Merge pull request #898 from MoonchildProductions/Sync-weave

Remove FxA Phase 1

93 files changed, 3323 insertions, 10569 deletions

diff --git a/services/sync/tests/unit/fake_login_manager.js b/services/sync/tests/unit/fake_login_manager.js
index 6f3148c45..32adcbcb5 100644
--- a/services/sync/tests/unit/fake_login_manager.js
+++ b/services/sync/tests/unit/fake_login_manager.js
@@ -4,7 +4,7 @@ Cu.import("resource://services-sync/util.js");
 // Fake Sample Data
 // ----------------------------------------
 
-var fakeSampleLogins = [
+let fakeSampleLogins = [
   // Fake nsILoginInfo object.
   {hostname: "www.boogle.com",
    formSubmitURL: "http://www.boogle.com/search",
diff --git a/services/sync/tests/unit/head_appinfo.js b/services/sync/tests/unit/head_appinfo.js
index d2a680df5..eea47905f 100644
--- a/services/sync/tests/unit/head_appinfo.js
+++ b/services/sync/tests/unit/head_appinfo.js
@@ -1,54 +1,65 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
-var {classes: Cc, interfaces: Ci, results: Cr, utils: Cu} = Components;
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+const {classes: Cc, interfaces: Ci, results: Cr, utils: Cu} = Components;
 
-var gSyncProfile;
+let gSyncProfile;
 
 gSyncProfile = do_get_profile();
 
 // Init FormHistoryStartup and pretend we opened a profile.
-var fhs = Cc["@mozilla.org/satchel/form-history-startup;1"]
+let fhs = Cc["@mozilla.org/satchel/form-history-startup;1"]
             .getService(Ci.nsIObserver);
 fhs.observe(null, "profile-after-change", null);
 
-// An app is going to have some prefs set which xpcshell tests don't.
-Services.prefs.setCharPref("identity.sync.tokenserver.uri", "http://token-server");
 
-// Set the validation prefs to attempt validation every time to avoid non-determinism.
-Services.prefs.setIntPref("services.sync.validation.interval", 0);
-Services.prefs.setIntPref("services.sync.validation.percentageChance", 100);
-Services.prefs.setIntPref("services.sync.validation.maxRecords", -1);
-Services.prefs.setBoolPref("services.sync.validation.enabled", true);
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
 // Make sure to provide the right OS so crypto loads the right binaries
-function getOS() {
-  switch (mozinfo.os) {
-    case "win":
-      return "WINNT";
-    case "mac":
-      return "Darwin";
-    default:
-      return "Linux";
-  }
-}
+let OS = "XPCShell";
+if ("@mozilla.org/windows-registry-key;1" in Cc)
+  OS = "WINNT";
+else if ("nsILocalFileMac" in Ci)
+  OS = "Darwin";
+else
+  OS = "Linux";
 
-Cu.import("resource://testing-common/AppInfo.jsm", this);
-updateAppInfo({
+let XULAppInfo = {
+  vendor: "Mozilla",
   name: "XPCShell",
   ID: "xpcshell@tests.mozilla.org",
   version: "1",
+  appBuildID: "20100621",
   platformVersion: "",
-  OS: getOS(),
-});
+  platformBuildID: "20100621",
+  inSafeMode: false,
+  logConsoleErrors: true,
+  OS: OS,
+  XPCOMABI: "noarch-spidermonkey",
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIXULAppInfo, Ci.nsIXULRuntime]),
+  invalidateCachesOnRestart: function invalidateCachesOnRestart() { }
+};
+
+let XULAppInfoFactory = {
+  createInstance: function (outer, iid) {
+    if (outer != null)
+      throw Cr.NS_ERROR_NO_AGGREGATION;
+    return XULAppInfo.QueryInterface(iid);
+  }
+};
+
+let registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
+registrar.registerFactory(Components.ID("{fbfae60b-64a4-44ef-a911-08ceb70b9f31}"),
+                          "XULAppInfo", "@mozilla.org/xre/app-info;1",
+                          XULAppInfoFactory);
+
 
 // Register resource aliases. Normally done in SyncComponents.manifest.
 function addResourceAlias() {
+  Cu.import("resource://gre/modules/Services.jsm");
   const resProt = Services.io.getProtocolHandler("resource")
                           .QueryInterface(Ci.nsIResProtocolHandler);
-  for (let s of ["common", "sync", "crypto"]) {
+  for each (let s in ["common", "sync", "crypto"]) {
     let uri = Services.io.newURI("resource://gre/modules/services-" + s + "/", null,
                                  null);
     resProt.setSubstitution("services-" + s, uri);
diff --git a/services/sync/tests/unit/head_errorhandler_common.js b/services/sync/tests/unit/head_errorhandler_common.js
deleted file mode 100644
index f4af60d9d..000000000
--- a/services/sync/tests/unit/head_errorhandler_common.js
+++ /dev/null
@@ -1,112 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/engines.js");
-
-// Common code for test_errorhandler_{1,2}.js -- pulled out to make it less
-// monolithic and take less time to execute.
-const EHTestsCommon = {
-
-  service_unavailable(request, response) {
-    let body = "Service Unavailable";
-    response.setStatusLine(request.httpVersion, 503, "Service Unavailable");
-    response.setHeader("Retry-After", "42");
-    response.bodyOutputStream.write(body, body.length);
-  },
-
-  sync_httpd_setup() {
-    let global = new ServerWBO("global", {
-      syncID: Service.syncID,
-      storageVersion: STORAGE_VERSION,
-      engines: {clients: {version: Service.clientsEngine.version,
-                          syncID: Service.clientsEngine.syncID},
-                catapult: {version: Service.engineManager.get("catapult").version,
-                           syncID: Service.engineManager.get("catapult").syncID}}
-    });
-    let clientsColl = new ServerCollection({}, true);
-
-    // Tracking info/collections.
-    let collectionsHelper = track_collections_helper();
-    let upd = collectionsHelper.with_updated_collection;
-
-    let handler_401 = httpd_handler(401, "Unauthorized");
-    return httpd_setup({
-      // Normal server behaviour.
-      "/1.1/johndoe/storage/meta/global": upd("meta", global.handler()),
-      "/1.1/johndoe/info/collections": collectionsHelper.handler,
-      "/1.1/johndoe/storage/crypto/keys":
-        upd("crypto", (new ServerWBO("keys")).handler()),
-      "/1.1/johndoe/storage/clients": upd("clients", clientsColl.handler()),
-
-      // Credentials are wrong or node reallocated.
-      "/1.1/janedoe/storage/meta/global": handler_401,
-      "/1.1/janedoe/info/collections": handler_401,
-
-      // Maintenance or overloaded (503 + Retry-After) at info/collections.
-      "/maintenance/1.1/broken.info/info/collections": EHTestsCommon.service_unavailable,
-
-      // Maintenance or overloaded (503 + Retry-After) at meta/global.
-      "/maintenance/1.1/broken.meta/storage/meta/global": EHTestsCommon.service_unavailable,
-      "/maintenance/1.1/broken.meta/info/collections": collectionsHelper.handler,
-
-      // Maintenance or overloaded (503 + Retry-After) at crypto/keys.
-      "/maintenance/1.1/broken.keys/storage/meta/global": upd("meta", global.handler()),
-      "/maintenance/1.1/broken.keys/info/collections": collectionsHelper.handler,
-      "/maintenance/1.1/broken.keys/storage/crypto/keys": EHTestsCommon.service_unavailable,
-
-      // Maintenance or overloaded (503 + Retry-After) at wiping collection.
-      "/maintenance/1.1/broken.wipe/info/collections": collectionsHelper.handler,
-      "/maintenance/1.1/broken.wipe/storage/meta/global": upd("meta", global.handler()),
-      "/maintenance/1.1/broken.wipe/storage/crypto/keys":
-        upd("crypto", (new ServerWBO("keys")).handler()),
-      "/maintenance/1.1/broken.wipe/storage": EHTestsCommon.service_unavailable,
-      "/maintenance/1.1/broken.wipe/storage/clients": upd("clients", clientsColl.handler()),
-      "/maintenance/1.1/broken.wipe/storage/catapult": EHTestsCommon.service_unavailable
-    });
-  },
-
-  CatapultEngine: (function() {
-    function CatapultEngine() {
-      SyncEngine.call(this, "Catapult", Service);
-    }
-    CatapultEngine.prototype = {
-      __proto__: SyncEngine.prototype,
-      exception: null, // tests fill this in
-      _sync: function _sync() {
-        if (this.exception) {
-          throw this.exception;
-        }
-      }
-    };
-
-    return CatapultEngine;
-  }()),
-
-
-  generateCredentialsChangedFailure() {
-    // Make sync fail due to changed credentials. We simply re-encrypt
-    // the keys with a different Sync Key, without changing the local one.
-    let newSyncKeyBundle = new SyncKeyBundle("johndoe", "23456234562345623456234562");
-    let keys = Service.collectionKeys.asWBO();
-    keys.encrypt(newSyncKeyBundle);
-    keys.upload(Service.resource(Service.cryptoKeysURL));
-  },
-
-  setUp(server) {
-    return configureIdentity({ username: "johndoe" }).then(
-      () => {
-        Service.serverURL  = server.baseURI + "/";
-        Service.clusterURL = server.baseURI + "/";
-      }
-    ).then(
-      () => EHTestsCommon.generateAndUploadKeys()
-    );
-  },
-
-  generateAndUploadKeys() {
-    generateNewKeys(Service.collectionKeys);
-    let serverKeys = Service.collectionKeys.asWBO("crypto", "keys");
-    serverKeys.encrypt(Service.identity.syncKeyBundle);
-    return serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success;
-  }
-};
diff --git a/services/sync/tests/unit/head_helpers.js b/services/sync/tests/unit/head_helpers.js
index 3c59e1de5..04534dc8e 100644
--- a/services/sync/tests/unit/head_helpers.js
+++ b/services/sync/tests/unit/head_helpers.js
@@ -4,39 +4,8 @@
 Cu.import("resource://services-common/async.js");
 Cu.import("resource://testing-common/services/common/utils.js");
 Cu.import("resource://testing-common/PlacesTestUtils.jsm");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
-XPCOMUtils.defineLazyGetter(this, 'SyncPingSchema', function() {
-  let ns = {};
-  Cu.import("resource://gre/modules/FileUtils.jsm", ns);
-  let stream = Cc["@mozilla.org/network/file-input-stream;1"]
-               .createInstance(Ci.nsIFileInputStream);
-  let jsonReader = Cc["@mozilla.org/dom/json;1"]
-                   .createInstance(Components.interfaces.nsIJSON);
-  let schema;
-  try {
-    let schemaFile = do_get_file("sync_ping_schema.json");
-    stream.init(schemaFile, ns.FileUtils.MODE_RDONLY, ns.FileUtils.PERMS_FILE, 0);
-    schema = jsonReader.decodeFromStream(stream, stream.available());
-  } finally {
-    stream.close();
-  }
-
-  // Allow tests to make whatever engines they want, this shouldn't cause
-  // validation failure.
-  schema.definitions.engine.properties.name = { type: "string" };
-  return schema;
-});
-
-XPCOMUtils.defineLazyGetter(this, 'SyncPingValidator', function() {
-  let ns = {};
-  Cu.import("resource://testing-common/ajv-4.1.1.js", ns);
-  let ajv = new ns.Ajv({ async: "co*" });
-  return ajv.compile(SyncPingSchema);
-});
-
-var provider = {
+let provider = {
   getFile: function(prop, persistent) {
     persistent.value = true;
     switch (prop) {
@@ -51,7 +20,7 @@ var provider = {
 Services.dirsvc.QueryInterface(Ci.nsIDirectoryService).registerProvider(provider);
 
 // This is needed for loadAddonTestFunctions().
-var gGlobalScope = this;
+let gGlobalScope = this;
 
 function ExtensionsTestPath(path) {
   if (path[0] != "/") {
@@ -76,24 +45,6 @@ function loadAddonTestFunctions() {
   createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
 }
 
-function webExtensionsTestPath(path) {
-  if (path[0] != "/") {
-    throw Error("Path must begin with '/': " + path);
-  }
-
-  return "../../../../toolkit/components/extensions/test/xpcshell" + path;
-}
-
-/**
- * Loads the WebExtension test functions by importing its test file.
- */
-function loadWebExtensionTestFunctions() {
-  const path = webExtensionsTestPath("/head_sync.js");
-  let file = do_get_file(path);
-  let uri = Services.io.newFileURI(file);
-  Services.scriptloader.loadSubScript(uri.spec, gGlobalScope);
-}
-
 function getAddonInstall(name) {
   let f = do_get_file(ExtensionsTestPath("/addons/" + name + ".xpi"));
   let cb = Async.makeSyncCallback();
@@ -255,192 +206,3 @@ function do_check_array_eq(a1, a2) {
     do_check_eq(a1[i], a2[i]);
   }
 }
-
-// Helper function to get the sync telemetry and add the typically used test
-// engine names to its list of allowed engines.
-function get_sync_test_telemetry() {
-  let ns = {};
-  Cu.import("resource://services-sync/telemetry.js", ns);
-  let testEngines = ["rotary", "steam", "sterling", "catapult"];
-  for (let engineName of testEngines) {
-    ns.SyncTelemetry.allowedEngines.add(engineName);
-  }
-  ns.SyncTelemetry.submissionInterval = -1;
-  return ns.SyncTelemetry;
-}
-
-function assert_valid_ping(record) {
-  // This is called as the test harness tears down due to shutdown. This
-  // will typically have no recorded syncs, and the validator complains about
-  // it. So ignore such records (but only ignore when *both* shutdown and
-  // no Syncs - either of them not being true might be an actual problem)
-  if (record && (record.why != "shutdown" || record.syncs.length != 0)) {
-    if (!SyncPingValidator(record)) {
-      deepEqual([], SyncPingValidator.errors, "Sync telemetry ping validation failed");
-    }
-    equal(record.version, 1);
-    record.syncs.forEach(p => {
-      lessOrEqual(p.when, Date.now());
-      if (p.devices) {
-        ok(!p.devices.some(device => device.id == p.deviceID));
-        equal(new Set(p.devices.map(device => device.id)).size,
-              p.devices.length, "Duplicate device ids in ping devices list");
-      }
-    });
-  }
-}
-
-// Asserts that `ping` is a ping that doesn't contain any failure information
-function assert_success_ping(ping) {
-  ok(!!ping);
-  assert_valid_ping(ping);
-  ping.syncs.forEach(record => {
-    ok(!record.failureReason);
-    equal(undefined, record.status);
-    greater(record.engines.length, 0);
-    for (let e of record.engines) {
-      ok(!e.failureReason);
-      equal(undefined, e.status);
-      if (e.validation) {
-        equal(undefined, e.validation.problems);
-        equal(undefined, e.validation.failureReason);
-      }
-      if (e.outgoing) {
-        for (let o of e.outgoing) {
-          equal(undefined, o.failed);
-          notEqual(undefined, o.sent);
-        }
-      }
-      if (e.incoming) {
-        equal(undefined, e.incoming.failed);
-        equal(undefined, e.incoming.newFailed);
-        notEqual(undefined, e.incoming.applied || e.incoming.reconciled);
-      }
-    }
-  });
-}
-
-// Hooks into telemetry to validate all pings after calling.
-function validate_all_future_pings() {
-  let telem = get_sync_test_telemetry();
-  telem.submit = assert_valid_ping;
-}
-
-function wait_for_ping(callback, allowErrorPings, getFullPing = false) {
-  return new Promise(resolve => {
-    let telem = get_sync_test_telemetry();
-    let oldSubmit = telem.submit;
-    telem.submit = function(record) {
-      telem.submit = oldSubmit;
-      if (allowErrorPings) {
-        assert_valid_ping(record);
-      } else {
-        assert_success_ping(record);
-      }
-      if (getFullPing) {
-        resolve(record);
-      } else {
-        equal(record.syncs.length, 1);
-        resolve(record.syncs[0]);
-      }
-    };
-    callback();
-  });
-}
-
-// Short helper for wait_for_ping
-function sync_and_validate_telem(allowErrorPings, getFullPing = false) {
-  return wait_for_ping(() => Service.sync(), allowErrorPings, getFullPing);
-}
-
-// Used for the (many) cases where we do a 'partial' sync, where only a single
-// engine is actually synced, but we still want to ensure we're generating a
-// valid ping. Returns a promise that resolves to the ping, or rejects with the
-// thrown error after calling an optional callback.
-function sync_engine_and_validate_telem(engine, allowErrorPings, onError) {
-  return new Promise((resolve, reject) => {
-    let telem = get_sync_test_telemetry();
-    let caughtError = null;
-    // Clear out status, so failures from previous syncs won't show up in the
-    // telemetry ping.
-    let ns = {};
-    Cu.import("resource://services-sync/status.js", ns);
-    ns.Status._engines = {};
-    ns.Status.partial = false;
-    // Ideally we'd clear these out like we do with engines, (probably via
-    // Status.resetSync()), but this causes *numerous* tests to fail, so we just
-    // assume that if no failureReason or engine failures are set, and the
-    // status properties are the same as they were initially, that it's just
-    // a leftover.
-    // This is only an issue since we're triggering the sync of just one engine,
-    // without doing any other parts of the sync.
-    let initialServiceStatus = ns.Status._service;
-    let initialSyncStatus = ns.Status._sync;
-
-    let oldSubmit = telem.submit;
-    telem.submit = function(ping) {
-      telem.submit = oldSubmit;
-      ping.syncs.forEach(record => {
-        if (record && record.status) {
-          // did we see anything to lead us to believe that something bad actually happened
-          let realProblem = record.failureReason || record.engines.some(e => {
-            if (e.failureReason || e.status) {
-              return true;
-            }
-            if (e.outgoing && e.outgoing.some(o => o.failed > 0)) {
-              return true;
-            }
-            return e.incoming && e.incoming.failed;
-          });
-          if (!realProblem) {
-            // no, so if the status is the same as it was initially, just assume
-            // that its leftover and that we can ignore it.
-            if (record.status.sync && record.status.sync == initialSyncStatus) {
-              delete record.status.sync;
-            }
-            if (record.status.service && record.status.service == initialServiceStatus) {
-              delete record.status.service;
-            }
-            if (!record.status.sync && !record.status.service) {
-              delete record.status;
-            }
-          }
-        }
-      });
-      if (allowErrorPings) {
-        assert_valid_ping(ping);
-      } else {
-        assert_success_ping(ping);
-      }
-      equal(ping.syncs.length, 1);
-      if (caughtError) {
-        if (onError) {
-          onError(ping.syncs[0]);
-        }
-        reject(caughtError);
-      } else {
-        resolve(ping.syncs[0]);
-      }
-    }
-    Svc.Obs.notify("weave:service:sync:start");
-    try {
-      engine.sync();
-    } catch (e) {
-      caughtError = e;
-    }
-    if (caughtError) {
-      Svc.Obs.notify("weave:service:sync:error", caughtError);
-    } else {
-      Svc.Obs.notify("weave:service:sync:finish");
-    }
-  });
-}
-
-// Avoid an issue where `client.name2` containing unicode characters causes
-// a number of tests to fail, due to them assuming that we do not need to utf-8
-// encode or decode data sent through the mocked server (see bug 1268912).
-Utils.getDefaultDeviceName = function() {
-  return "Test device name";
-};
-
-
diff --git a/services/sync/tests/unit/head_http_server.js b/services/sync/tests/unit/head_http_server.js
index 26f62310c..c917c4988 100644
--- a/services/sync/tests/unit/head_http_server.js
+++ b/services/sync/tests/unit/head_http_server.js
@@ -1,4 +1,4 @@
-var Cm = Components.manager;
+const Cm = Components.manager;
 
 // Shared logging for all HTTP server functions.
 Cu.import("resource://gre/modules/Log.jsm");
@@ -178,13 +178,9 @@ ServerCollection.prototype = {
    * @return an array of IDs.
    */
   keys: function keys(filter) {
-    let ids = [];
-    for (let [id, wbo] of Object.entries(this._wbos)) {
-      if (wbo.payload && (!filter || filter(id, wbo))) {
-        ids.push(id);
-      }
-    }
-    return ids;
+    return [id for ([id, wbo] in Iterator(this._wbos))
+               if (wbo.payload &&
+                   (!filter || filter(id, wbo)))];
   },
 
   /**
@@ -198,13 +194,8 @@ ServerCollection.prototype = {
    * @return an array of ServerWBOs.
    */
   wbos: function wbos(filter) {
-    let os = [];
-    for (let [id, wbo] of Object.entries(this._wbos)) {
-      if (wbo.payload) {
-        os.push(wbo);
-      }
-    }
-
+    let os = [wbo for ([id, wbo] in Iterator(this._wbos))
+              if (wbo.payload)];
     if (filter) {
       return os.filter(filter);
     }
@@ -276,7 +267,7 @@ ServerCollection.prototype = {
   count: function(options) {
     options = options || {};
     let c = 0;
-    for (let [id, wbo] of Object.entries(this._wbos)) {
+    for (let [id, wbo] in Iterator(this._wbos)) {
       if (wbo.modified && this._inResultSet(wbo, options)) {
         c++;
       }
@@ -287,23 +278,12 @@ ServerCollection.prototype = {
   get: function(options) {
     let result;
     if (options.full) {
-      let data = [];
-      for (let [id, wbo] of Object.entries(this._wbos)) {
-        // Drop deleted.
-        if (wbo.modified && this._inResultSet(wbo, options)) {
-          data.push(wbo.get());
-        }
-      }
-      let start = options.offset || 0;
+      let data = [wbo.get() for ([id, wbo] in Iterator(this._wbos))
+                            // Drop deleted.
+                            if (wbo.modified &&
+                                this._inResultSet(wbo, options))];
       if (options.limit) {
-        let numItemsPastOffset = data.length - start;
-        data = data.slice(start, start + options.limit);
-        // use options as a backchannel to set x-weave-next-offset
-        if (numItemsPastOffset > options.limit) {
-          options.nextOffset = start + options.limit;
-        }
-      } else if (start) {
-        data = data.slice(start);
+        data = data.slice(0, options.limit);
       }
       // Our implementation of application/newlines.
       result = data.join("\n") + "\n";
@@ -311,18 +291,10 @@ ServerCollection.prototype = {
       // Use options as a backchannel to report count.
       options.recordCount = data.length;
     } else {
-      let data = [];
-      for (let [id, wbo] of Object.entries(this._wbos)) {
-        if (this._inResultSet(wbo, options)) {
-          data.push(id);
-        }
-      }
-      let start = options.offset || 0;
+      let data = [id for ([id, wbo] in Iterator(this._wbos))
+                     if (this._inResultSet(wbo, options))];
       if (options.limit) {
-        data = data.slice(start, start + options.limit);
-        options.nextOffset = start + options.limit;
-      } else if (start) {
-        data = data.slice(start);
+        data = data.slice(0, options.limit);
       }
       result = JSON.stringify(data);
       options.recordCount = data.length;
@@ -337,8 +309,7 @@ ServerCollection.prototype = {
 
     // This will count records where we have an existing ServerWBO
     // registered with us as successful and all other records as failed.
-    for (let key in input) {
-      let record = input[key];
+    for each (let record in input) {
       let wbo = this.wbo(record.id);
       if (!wbo && this.acceptNew) {
         this._log.debug("Creating WBO " + JSON.stringify(record.id) +
@@ -361,7 +332,7 @@ ServerCollection.prototype = {
 
   delete: function(options) {
     let deleted = [];
-    for (let [id, wbo] of Object.entries(this._wbos)) {
+    for (let [id, wbo] in Iterator(this._wbos)) {
       if (this._inResultSet(wbo, options)) {
         this._log.debug("Deleting " + JSON.stringify(wbo));
         deleted.push(wbo.id);
@@ -383,7 +354,7 @@ ServerCollection.prototype = {
 
       // Parse queryString
       let options = {};
-      for (let chunk of request.queryString.split("&")) {
+      for each (let chunk in request.queryString.split("&")) {
         if (!chunk) {
           continue;
         }
@@ -403,36 +374,29 @@ ServerCollection.prototype = {
       if (options.limit) {
         options.limit = parseInt(options.limit, 10);
       }
-      if (options.offset) {
-        options.offset = parseInt(options.offset, 10);
-      }
 
       switch(request.method) {
         case "GET":
-          body = self.get(options, request);
-          // see http://moz-services-docs.readthedocs.io/en/latest/storage/apis-1.5.html
-          // for description of these headers.
-          let { recordCount: records, nextOffset } = options;
-
-          self._log.info("Records: " + records + ", nextOffset: " + nextOffset);
+          body = self.get(options);
+          // "If supported by the db, this header will return the number of
+          // records total in the request body of any multiple-record GET
+          // request."
+          let records = options.recordCount;
+          self._log.info("Records: " + records);
           if (records != null) {
             response.setHeader("X-Weave-Records", "" + records);
           }
-          if (nextOffset) {
-            response.setHeader("X-Weave-Next-Offset", "" + nextOffset);
-          }
-          response.setHeader("X-Last-Modified", "" + this.timestamp);
           break;
 
         case "POST":
-          let res = self.post(readBytesFromInputStream(request.bodyInputStream), request);
+          let res = self.post(readBytesFromInputStream(request.bodyInputStream));
           body = JSON.stringify(res);
           response.newModified = res.modified;
           break;
 
         case "DELETE":
           self._log.debug("Invoking ServerCollection.DELETE.");
-          let deleted = self.delete(options, request);
+          let deleted = self.delete(options);
           let ts = new_timestamp();
           body = JSON.stringify(ts);
           response.newModified = ts;
@@ -541,7 +505,7 @@ function track_collections_helper() {
  * find out what it needs without monkeypatching. Use this object as your
  * prototype, and override as appropriate.
  */
-var SyncServerCallback = {
+let SyncServerCallback = {
   onCollectionDeleted: function onCollectionDeleted(user, collection) {},
   onItemDeleted: function onItemDeleted(user, collection, wboID) {},
 
@@ -581,13 +545,13 @@ SyncServer.prototype = {
    * Start the SyncServer's underlying HTTP server.
    *
    * @param port
-   *        The numeric port on which to start. -1 implies the default, a
-   *        randomly chosen port.
+   *        The numeric port on which to start. A falsy value implies the
+   *        default, a randomly chosen port.
    * @param cb
    *        A callback function (of no arguments) which is invoked after
    *        startup.
    */
-  start: function start(port = -1, cb) {
+  start: function start(port, cb) {
     if (this.started) {
       this._log.warn("Warning: server already started on " + this.port);
       return;
@@ -605,7 +569,7 @@ SyncServer.prototype = {
     } catch (ex) {
       _("==========================================");
       _("Got exception starting Sync HTTP server.");
-      _("Error: " + Log.exceptionStr(ex));
+      _("Error: " + Utils.exceptionStr(ex));
       _("Is there a process already listening on port " + port + "?");
       _("==========================================");
       do_throw(ex);
@@ -703,10 +667,10 @@ SyncServer.prototype = {
       throw new Error("Unknown user.");
     }
     let userCollections = this.users[username].collections;
-    for (let [id, contents] of Object.entries(collections)) {
+    for (let [id, contents] in Iterator(collections)) {
       let coll = userCollections[id] ||
                  this._insertCollection(userCollections, id);
-      for (let [wboID, payload] of Object.entries(contents)) {
+      for (let [wboID, payload] in Iterator(contents)) {
         coll.insert(wboID, payload);
       }
     }
@@ -740,8 +704,7 @@ SyncServer.prototype = {
       throw new Error("Unknown user.");
     }
     let userCollections = this.users[username].collections;
-    for (let name in userCollections) {
-      let coll = userCollections[name];
+    for each (let [name, coll] in Iterator(userCollections)) {
       this._log.trace("Bulk deleting " + name + " for " + username + "...");
       coll.delete({});
     }
@@ -805,10 +768,7 @@ SyncServer.prototype = {
    */
   respond: function respond(req, resp, code, status, body, headers) {
     resp.setStatusLine(req.httpVersion, code, status);
-    if (!headers)
-      headers = this.defaultHeaders;
-    for (let header in headers) {
-      let value = headers[header];
+    for each (let [header, value] in Iterator(headers || this.defaultHeaders)) {
       resp.setHeader(header, value);
     }
     resp.setHeader("X-Weave-Timestamp", "" + this.timestamp(), false);
@@ -1035,7 +995,7 @@ SyncServer.prototype = {
  */
 function serverForUsers(users, contents, callback) {
   let server = new SyncServer(callback);
-  for (let [user, pass] of Object.entries(users)) {
+  for (let [user, pass] in Iterator(users)) {
     server.registerUser(user, pass);
     server.createContents(user, contents);
   }
diff --git a/services/sync/tests/unit/prefs_test_prefs_store.js b/services/sync/tests/unit/prefs_test_prefs_store.js
deleted file mode 100644
index 109757a35..000000000
--- a/services/sync/tests/unit/prefs_test_prefs_store.js
+++ /dev/null
@@ -1,25 +0,0 @@
-// This is a "preferences" file used by test_prefs_store.js
-
-// The prefs that control what should be synced.
-// Most of these are "default" prefs, so the value itself will not sync.
-pref("services.sync.prefs.sync.testing.int", true);
-pref("services.sync.prefs.sync.testing.string", true);
-pref("services.sync.prefs.sync.testing.bool", true);
-pref("services.sync.prefs.sync.testing.dont.change", true);
-// this one is a user pref, so it *will* sync.
-user_pref("services.sync.prefs.sync.testing.turned.off", false);
-pref("services.sync.prefs.sync.testing.nonexistent", true);
-pref("services.sync.prefs.sync.testing.default", true);
-
-// The preference values - these are all user_prefs, otherwise their value
-// will not be synced.
-user_pref("testing.int", 123);
-user_pref("testing.string", "ohai");
-user_pref("testing.bool", true);
-user_pref("testing.dont.change", "Please don't change me.");
-user_pref("testing.turned.off", "I won't get synced.");
-user_pref("testing.not.turned.on", "I won't get synced either!");
-
-// A pref that exists but still has the default value - will be synced with
-// null as the value.
-pref("testing.default", "I'm the default value");
diff --git a/services/sync/tests/unit/sync_ping_schema.json b/services/sync/tests/unit/sync_ping_schema.json
deleted file mode 100644
index 56114fb93..000000000
--- a/services/sync/tests/unit/sync_ping_schema.json
+++ /dev/null
@@ -1,198 +0,0 @@
-{
-  "$schema": "http://json-schema.org/draft-04/schema#",
-  "description": "schema for Sync pings, documentation avaliable in toolkit/components/telemetry/docs/sync-ping.rst",
-  "type": "object",
-  "additionalProperties": false,
-  "required": ["version", "syncs", "why"],
-  "properties": {
-    "version": { "type": "integer", "minimum": 0 },
-    "discarded": { "type": "integer", "minimum": 1 },
-    "why": { "enum": ["shutdown", "schedule"] },
-    "syncs": {
-      "type": "array",
-      "minItems": 1,
-      "items": { "$ref": "#/definitions/payload" }
-    }
-  },
-  "definitions": {
-    "payload": {
-      "type": "object",
-      "additionalProperties": false,
-      "required": ["when", "uid", "took"],
-      "properties": {
-        "didLogin": { "type": "boolean" },
-        "when": { "type": "integer" },
-        "uid": {
-          "type": "string",
-          "pattern": "^[0-9a-f]{32}$"
-        },
-        "devices": {
-          "type": "array",
-          "items": { "$ref": "#/definitions/device" }
-        },
-        "deviceID": {
-          "type": "string",
-          "pattern": "^[0-9a-f]{64}$"
-        },
-        "status": {
-          "type": "object",
-          "anyOf": [
-            { "required": ["sync"] },
-            { "required": ["service"] }
-          ],
-          "additionalProperties": false,
-          "properties": {
-            "sync": { "type": "string" },
-            "service": { "type": "string" }
-          }
-        },
-        "why": { "enum": ["startup", "schedule", "score", "user", "tabs"] },
-        "took": { "type": "integer", "minimum": -1 },
-        "failureReason": { "$ref": "#/definitions/error" },
-        "engines": {
-          "type": "array",
-          "minItems": 1,
-          "items": { "$ref": "#/definitions/engine" }
-        }
-      }
-    },
-    "device": {
-      "required": ["os", "id", "version"],
-      "additionalProperties": false,
-      "type": "object",
-      "properties": {
-        "id": { "type": "string", "pattern": "^[0-9a-f]{64}$" },
-        "os": { "type": "string" },
-        "version": { "type": "string" }
-      }
-    },
-    "engine": {
-      "required": ["name"],
-      "additionalProperties": false,
-      "properties": {
-        "failureReason": { "$ref": "#/definitions/error" },
-        "name": { "enum": ["addons", "bookmarks", "clients", "forms", "history", "passwords", "prefs", "tabs"] },
-        "took": { "type": "integer", "minimum": 1 },
-        "status": { "type": "string" },
-        "incoming": {
-          "type": "object",
-          "additionalProperties": false,
-          "anyOf": [
-            {"required": ["applied"]},
-            {"required": ["failed"]},
-            {"required": ["newFailed"]},
-            {"required": ["reconciled"]}
-          ],
-          "properties": {
-            "applied": { "type": "integer", "minimum": 1 },
-            "failed": { "type": "integer", "minimum": 1 },
-            "newFailed": { "type": "integer", "minimum": 1 },
-            "reconciled": { "type": "integer", "minimum": 1 }
-          }
-        },
-        "outgoing": {
-          "type": "array",
-          "minItems": 1,
-          "items": { "$ref": "#/definitions/outgoingBatch" }
-        },
-        "validation": {
-          "type": "object",
-          "additionalProperties": false,
-          "anyOf": [
-            { "required": ["checked"] },
-            { "required": ["failureReason"] }
-          ],
-          "properties": {
-            "checked": { "type": "integer", "minimum": 0 },
-            "failureReason": { "$ref": "#/definitions/error" },
-            "took": { "type": "integer" },
-            "version": { "type": "integer" },
-            "problems": {
-              "type": "array",
-              "minItems": 1,
-              "$ref": "#/definitions/validationProblem"
-            }
-          }
-        }
-      }
-    },
-    "outgoingBatch": {
-      "type": "object",
-      "additionalProperties": false,
-      "anyOf": [
-        {"required": ["sent"]},
-        {"required": ["failed"]}
-      ],
-      "properties": {
-        "sent": { "type": "integer", "minimum": 1 },
-        "failed": { "type": "integer", "minimum": 1 }
-      }
-    },
-    "error": {
-      "oneOf": [
-        { "$ref": "#/definitions/httpError" },
-        { "$ref": "#/definitions/nsError" },
-        { "$ref": "#/definitions/shutdownError" },
-        { "$ref": "#/definitions/authError" },
-        { "$ref": "#/definitions/otherError" },
-        { "$ref": "#/definitions/unexpectedError" },
-        { "$ref": "#/definitions/sqlError" }
-      ]
-    },
-    "httpError": {
-      "required": ["name", "code"],
-      "properties": {
-        "name": { "enum": ["httperror"] },
-        "code": { "type": "integer" }
-      }
-    },
-    "nsError": {
-      "required": ["name", "code"],
-      "properties": {
-        "name": { "enum": ["nserror"] },
-        "code": { "type": "integer" }
-      }
-    },
-    "shutdownError": {
-      "required": ["name"],
-      "properties": {
-        "name": { "enum": ["shutdownerror"] }
-      }
-    },
-    "authError": {
-      "required": ["name"],
-      "properties": {
-        "name": { "enum": ["autherror"] },
-        "from": { "enum": ["tokenserver", "fxaccounts", "hawkclient"] }
-      }
-    },
-    "otherError": {
-      "required": ["name"],
-      "properties": {
-        "name": { "enum": ["othererror"] },
-        "error": { "type": "string" }
-      }
-    },
-    "unexpectedError": {
-      "required": ["name"],
-      "properties": {
-        "name": { "enum": ["unexpectederror"] },
-        "error": { "type": "string" }
-      }
-    },
-    "sqlError": {
-      "required": ["name"],
-      "properties": {
-        "name": { "enum": ["sqlerror"] },
-        "code": { "type": "integer" }
-      }
-    },
-    "validationProblem": {
-      "required": ["name", "count"],
-      "properties": {
-        "name": { "type": "string" },
-        "count": { "type": "integer" }
-      }
-    }
-  }
-}
\ No newline at end of file
diff --git a/services/sync/tests/unit/systemaddon-search.xml b/services/sync/tests/unit/systemaddon-search.xml
deleted file mode 100644
index d34e3937c..000000000
--- a/services/sync/tests/unit/systemaddon-search.xml
+++ /dev/null
@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<searchresults total_results="1">
-  <addon id="5618">
-  <name>System Add-on Test</name>
-  <type id="1">Extension</type>
-  <guid>system1@tests.mozilla.org</guid>
-  <slug>addon11</slug>
-  <version>1.0</version>
-
-  <compatible_applications><application>
-      <name>Firefox</name>
-      <application_id>1</application_id>
-      <min_version>3.6</min_version>
-      <max_version>*</max_version>
-      <appID>xpcshell@tests.mozilla.org</appID>
-    </application></compatible_applications>
-  <all_compatible_os><os>ALL</os></all_compatible_os>
-
-  <install os="ALL" size="999">http://127.0.0.1:8888/system.xpi</install>
-    <created epoch="1252903662">
-      2009-09-14T04:47:42Z
-    </created>
-    <last_updated epoch="1315255329">
-      2011-09-05T20:42:09Z
-    </last_updated>
-    </addon>
-</searchresults>
diff --git a/services/sync/tests/unit/test_addon_utils.js b/services/sync/tests/unit/test_addon_utils.js
index bbbd81d0d..49824cd4c 100644
--- a/services/sync/tests/unit/test_addon_utils.js
+++ b/services/sync/tests/unit/test_addon_utils.js
@@ -3,7 +3,6 @@
 
 "use strict";
 
-Cu.import("resource://gre/modules/Log.jsm");
 Cu.import("resource://gre/modules/Preferences.jsm");
 Cu.import("resource://services-sync/addonutils.js");
 Cu.import("resource://services-sync/util.js");
@@ -11,7 +10,7 @@ Cu.import("resource://services-sync/util.js");
 const HTTP_PORT = 8888;
 const SERVER_ADDRESS = "http://127.0.0.1:8888";
 
-var prefs = new Preferences();
+let prefs = new Preferences();
 
 prefs.set("extensions.getAddons.get.url",
           SERVER_ADDRESS + "/search/guid:%IDS%");
@@ -36,7 +35,7 @@ function createAndStartHTTPServer(port=HTTP_PORT) {
     return server;
   } catch (ex) {
     _("Got exception starting HTTP server on port " + port);
-    _("Error: " + Log.exceptionStr(ex));
+    _("Error: " + Utils.exceptionStr(ex));
     do_throw(ex);
   }
 }
@@ -61,9 +60,6 @@ add_test(function test_handle_empty_source_uri() {
   do_check_true("installedIDs" in result);
   do_check_eq(0, result.installedIDs.length);
 
-  do_check_true("skipped" in result);
-  do_check_true(result.skipped.includes(ID));
-
   server.stop(run_next_test);
 });
 
@@ -83,18 +79,44 @@ add_test(function test_ignore_untrusted_source_uris() {
     let sourceURI = ioService.newURI(s, null, null);
     let addon = {sourceURI: sourceURI, name: "bad", id: "bad"};
 
-    let canInstall = AddonUtils.canInstallAddon(addon);
-    do_check_false(canInstall, "Correctly rejected a bad URL");
+    try {
+      let cb = Async.makeSpinningCallback();
+      AddonUtils.getInstallFromSearchResult(addon, cb, true);
+      cb.wait();
+    } catch (ex) {
+      do_check_neq(null, ex);
+      do_check_eq(0, ex.message.indexOf("Insecure source URI"));
+      continue;
+    }
+
+    // We should never get here if an exception is thrown.
+    do_check_true(false);
   }
 
+  let count = 0;
   for (let s of good) {
     let sourceURI = ioService.newURI(s, null, null);
     let addon = {sourceURI: sourceURI, name: "good", id: "good"};
 
-    let canInstall = AddonUtils.canInstallAddon(addon);
-    do_check_true(canInstall, "Correctly accepted a good URL");
+    // Despite what you might think, we don't get an error in the callback.
+    // The install won't work because the underlying Addon instance wasn't
+    // proper. But, that just results in an AddonInstall that is missing
+    // certain values. We really just care that the callback is being invoked
+    // anyway.
+    let callback = function onInstall(error, install) {
+      do_check_null(error);
+      do_check_neq(null, install);
+      do_check_eq(sourceURI.spec, install.sourceURI.spec);
+
+      count += 1;
+
+      if (count >= good.length) {
+        run_next_test();
+      }
+    };
+
+    AddonUtils.getInstallFromSearchResult(addon, callback, true);
   }
-  run_next_test();
 });
 
 add_test(function test_source_uri_rewrite() {
@@ -103,6 +125,8 @@ add_test(function test_source_uri_rewrite() {
   // This tests for conformance with bug 708134 so server-side metrics aren't
   // skewed.
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
+
   // We resort to monkeypatching because of the API design.
   let oldFunction = AddonUtils.__proto__.installAddonFromSearchResult;
 
@@ -127,15 +151,12 @@ add_test(function test_source_uri_rewrite() {
   let server = createAndStartHTTPServer();
 
   let installCallback = Async.makeSpinningCallback();
-  let installOptions = {
-    id: "rewrite@tests.mozilla.org",
-    requireSecureURI: false,
-  }
-  AddonUtils.installAddons([installOptions], installCallback);
+  AddonUtils.installAddons([{id: "rewrite@tests.mozilla.org"}], installCallback);
 
   installCallback.wait();
   do_check_true(installCalled);
   AddonUtils.__proto__.installAddonFromSearchResult = oldFunction;
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
   server.stop(run_next_test);
 });
diff --git a/services/sync/tests/unit/test_addons_engine.js b/services/sync/tests/unit/test_addons_engine.js
index 64e4e32e8..ca2e4bd96 100644
--- a/services/sync/tests/unit/test_addons_engine.js
+++ b/services/sync/tests/unit/test_addons_engine.js
@@ -13,20 +13,19 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-var prefs = new Preferences();
+let prefs = new Preferences();
 prefs.set("extensions.getAddons.get.url",
           "http://localhost:8888/search/guid:%IDS%");
-prefs.set("extensions.install.requireSecureOrigin", false);
 
 loadAddonTestFunctions();
 startupManager();
 
-var engineManager = Service.engineManager;
+let engineManager = Service.engineManager;
 
 engineManager.register(AddonsEngine);
-var engine = engineManager.get("addons");
-var reconciler = engine._reconciler;
-var tracker = engine._tracker;
+let engine = engineManager.get("addons");
+let reconciler = engine._reconciler;
+let tracker = engine._tracker;
 
 function advance_test() {
   reconciler._addons = {};
@@ -36,6 +35,8 @@ function advance_test() {
   reconciler.saveState(null, cb);
   cb.wait();
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
+
   run_next_test();
 }
 
@@ -103,6 +104,7 @@ add_test(function test_get_changed_ids() {
   tracker.clearChangedIDs();
 
   _("Ensure reconciler changes are populated.");
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
   let addon = installAddon("test_bootstrap1_1");
   tracker.clearChangedIDs(); // Just in case.
   changes = engine.getChangedIDs();
@@ -149,6 +151,9 @@ add_test(function test_disabled_install_semantics() {
   // This is essentially a test for bug 712542, which snuck into the original
   // add-on sync drop. It ensures that when an add-on is installed that the
   // disabled state and incoming syncGUID is preserved, even on the next sync.
+
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
+
   const USER       = "foo";
   const PASSWORD   = "password";
   const PASSPHRASE = "abcdeabcdeabcdeabcdeabcdea";
diff --git a/services/sync/tests/unit/test_addons_reconciler.js b/services/sync/tests/unit/test_addons_reconciler.js
index d93bdfc03..8cfa37d78 100644
--- a/services/sync/tests/unit/test_addons_reconciler.js
+++ b/services/sync/tests/unit/test_addons_reconciler.js
@@ -71,7 +71,7 @@ add_test(function test_install_detection() {
 
   const KEYS = ["id", "guid", "enabled", "installed", "modified", "type",
                 "scope", "foreignInstall"];
-  for (let key of KEYS) {
+  for each (let key in KEYS) {
     do_check_true(key in record);
     do_check_neq(null, record[key]);
   }
diff --git a/services/sync/tests/unit/test_addons_store.js b/services/sync/tests/unit/test_addons_store.js
index b52cfab31..b21f6afe1 100644
--- a/services/sync/tests/unit/test_addons_store.js
+++ b/services/sync/tests/unit/test_addons_store.js
@@ -3,47 +3,25 @@
 
 "use strict";
 
-Cu.import("resource://gre/modules/Log.jsm");
 Cu.import("resource://gre/modules/Preferences.jsm");
 Cu.import("resource://services-sync/addonutils.js");
 Cu.import("resource://services-sync/engines/addons.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://gre/modules/FileUtils.jsm");
 
 const HTTP_PORT = 8888;
 
-var prefs = new Preferences();
+let prefs = new Preferences();
 
 prefs.set("extensions.getAddons.get.url", "http://localhost:8888/search/guid:%IDS%");
-prefs.set("extensions.install.requireSecureOrigin", false);
-
-const SYSTEM_ADDON_ID = "system1@tests.mozilla.org";
-let systemAddonFile;
-
-// The system add-on must be installed before AddonManager is started.
-function loadSystemAddon() {
-  let addonFilename = SYSTEM_ADDON_ID + ".xpi";
-  const distroDir = FileUtils.getDir("ProfD", ["sysfeatures", "app0"], true);
-  do_get_file(ExtensionsTestPath("/data/system_addons/system1_1.xpi")).copyTo(distroDir, addonFilename);
-  systemAddonFile = FileUtils.File(distroDir.path);
-  systemAddonFile.append(addonFilename);
-  systemAddonFile.lastModifiedTime = Date.now();
-  // As we're not running in application, we need to setup the features directory
-  // used by system add-ons.
-  registerDirectory("XREAppFeat", distroDir);
-}
-
 loadAddonTestFunctions();
-loadSystemAddon();
 startupManager();
 
 Service.engineManager.register(AddonsEngine);
-var engine     = Service.engineManager.get("addons");
-var tracker    = engine._tracker;
-var store      = engine._store;
-var reconciler = engine._reconciler;
+let engine     = Service.engineManager.get("addons");
+let tracker    = engine._tracker;
+let store      = engine._store;
+let reconciler = engine._reconciler;
 
 /**
  * Create a AddonsRec for this application with the fields specified.
@@ -77,16 +55,12 @@ function createAndStartHTTPServer(port) {
     server.registerFile("/search/guid:missing-xpi%40tests.mozilla.org",
                         do_get_file("missing-xpi-search.xml"));
 
-    server.registerFile("/search/guid:system1%40tests.mozilla.org",
-                        do_get_file("systemaddon-search.xml"));
-    server.registerFile("/system.xpi", systemAddonFile);
-
     server.start(port);
 
     return server;
   } catch (ex) {
     _("Got exception starting HTTP server on port " + port);
-    _("Error: " + Log.exceptionStr(ex));
+    _("Error: " + Utils.exceptionStr(ex));
     do_throw(ex);
   }
 }
@@ -94,7 +68,6 @@ function createAndStartHTTPServer(port) {
 function run_test() {
   initTestLogging("Trace");
   Log.repository.getLogger("Sync.Engine.Addons").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.Tracker.Addons").level = Log.Level.Trace;
   Log.repository.getLogger("Sync.AddonsRepository").level =
     Log.Level.Trace;
 
@@ -219,6 +192,7 @@ add_test(function test_apply_uninstall() {
 add_test(function test_addon_syncability() {
   _("Ensure isAddonSyncable functions properly.");
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
   Svc.Prefs.set("addons.trustedSourceHostnames",
                 "addons.mozilla.org,other.example.com");
 
@@ -228,8 +202,8 @@ add_test(function test_addon_syncability() {
   do_check_true(store.isAddonSyncable(addon));
 
   let dummy = {};
-  const KEYS = ["id", "syncGUID", "type", "scope", "foreignInstall", "isSyncable"];
-  for (let k of KEYS) {
+  const KEYS = ["id", "syncGUID", "type", "scope", "foreignInstall"];
+  for each (let k in KEYS) {
     dummy[k] = addon[k];
   }
 
@@ -243,10 +217,6 @@ add_test(function test_addon_syncability() {
   do_check_false(store.isAddonSyncable(dummy));
   dummy.scope = addon.scope;
 
-  dummy.isSyncable = false;
-  do_check_false(store.isAddonSyncable(dummy));
-  dummy.isSyncable = addon.isSyncable;
-
   dummy.foreignInstall = true;
   do_check_false(store.isAddonSyncable(dummy));
   dummy.foreignInstall = false;
@@ -272,16 +242,16 @@ add_test(function test_addon_syncability() {
     "https://untrusted.example.com/foo", // non-trusted hostname`
   ];
 
-  for (let uri of trusted) {
+  for each (let uri in trusted) {
     do_check_true(store.isSourceURITrusted(createURI(uri)));
   }
 
-  for (let uri of untrusted) {
+  for each (let uri in untrusted) {
     do_check_false(store.isSourceURITrusted(createURI(uri)));
   }
 
   Svc.Prefs.set("addons.trustedSourceHostnames", "");
-  for (let uri of trusted) {
+  for each (let uri in trusted) {
     do_check_false(store.isSourceURITrusted(createURI(uri)));
   }
 
@@ -296,6 +266,8 @@ add_test(function test_addon_syncability() {
 add_test(function test_ignore_hotfixes() {
   _("Ensure that hotfix extensions are ignored.");
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
+
   // A hotfix extension is one that has the id the same as the
   // extensions.hotfix.id pref.
   let prefs = new Preferences("extensions.");
@@ -304,8 +276,8 @@ add_test(function test_ignore_hotfixes() {
   do_check_true(store.isAddonSyncable(addon));
 
   let dummy = {};
-  const KEYS = ["id", "syncGUID", "type", "scope", "foreignInstall", "isSyncable"];
-  for (let k of KEYS) {
+  const KEYS = ["id", "syncGUID", "type", "scope", "foreignInstall"];
+  for each (let k in KEYS) {
     dummy[k] = addon[k];
   }
 
@@ -327,6 +299,7 @@ add_test(function test_ignore_hotfixes() {
 
   uninstallAddon(addon);
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
   prefs.reset("hotfix.id");
 
   run_next_test();
@@ -336,6 +309,8 @@ add_test(function test_ignore_hotfixes() {
 add_test(function test_get_all_ids() {
   _("Ensures that getAllIDs() returns an appropriate set.");
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
+
   _("Installing two addons.");
   let addon1 = installAddon("test_install1");
   let addon2 = installAddon("test_bootstrap1_1");
@@ -354,6 +329,7 @@ add_test(function test_get_all_ids() {
   addon1.install.cancel();
   uninstallAddon(addon2);
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
   run_next_test();
 });
 
@@ -379,6 +355,9 @@ add_test(function test_change_item_id() {
 add_test(function test_create() {
   _("Ensure creating/installing an add-on from a record works.");
 
+  // Set this so that getInstallFromSearchResult doesn't end up
+  // failing the install due to an insecure source URI scheme.
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
   let server = createAndStartHTTPServer(HTTP_PORT);
 
   let addon = installAddon("test_bootstrap1_1");
@@ -398,6 +377,7 @@ add_test(function test_create() {
 
   uninstallAddon(newAddon);
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
   server.stop(run_next_test);
 });
 
@@ -432,18 +412,8 @@ add_test(function test_create_bad_install() {
   let record = createRecordForThisApp(guid, id, true, false);
 
   let failed = store.applyIncomingBatch([record]);
-  // This addon had no source URI so was skipped - but it's not treated as
-  // failure.
-  // XXX - this test isn't testing what we thought it was. Previously the addon
-  // was not being installed due to requireSecureURL checking *before* we'd
-  // attempted to get the XPI.
-  // With requireSecureURL disabled we do see a download failure, but the addon
-  // *does* get added to |failed|.
-  // FTR: onDownloadFailed() is called with ERROR_NETWORK_FAILURE, so it's going
-  // to be tricky to distinguish a 404 from other transient network errors
-  // where we do want the addon to end up in |failed|.
-  // This is being tracked in bug 1284778.
-  //do_check_eq(0, failed.length);
+  do_check_eq(1, failed.length);
+  do_check_eq(guid, failed[0]);
 
   let addon = getAddonFromAddonManagerByID(id);
   do_check_eq(null, addon);
@@ -451,56 +421,19 @@ add_test(function test_create_bad_install() {
   server.stop(run_next_test);
 });
 
-add_test(function test_ignore_system() {
-  _("Ensure we ignore system addons");
-  // Our system addon should not appear in getAllIDs
-  engine._refreshReconcilerState();
-  let num = 0;
-  for (let guid in store.getAllIDs()) {
-    num += 1;
-    let addon = reconciler.getAddonStateFromSyncGUID(guid);
-    do_check_neq(addon.id, SYSTEM_ADDON_ID);
-  }
-  do_check_true(num > 1, "should have seen at least one.")
-  run_next_test();
-});
-
-add_test(function test_incoming_system() {
-  _("Ensure we handle incoming records that refer to a system addon");
-  // eg, loop initially had a normal addon but it was then "promoted" to be a
-  // system addon but wanted to keep the same ID. The server record exists due
-  // to this.
-
-  // before we start, ensure the system addon isn't disabled.
-  do_check_false(getAddonFromAddonManagerByID(SYSTEM_ADDON_ID).userDisabled);
-
-  // Now simulate an incoming record with the same ID as the system addon,
-  // but flagged as disabled - it should not be applied.
-  let server = createAndStartHTTPServer(HTTP_PORT);
-  // We make the incoming record flag the system addon as disabled - it should
-  // be ignored.
-  let guid = Utils.makeGUID();
-  let record = createRecordForThisApp(guid, SYSTEM_ADDON_ID, false, false);
-
-  let failed = store.applyIncomingBatch([record]);
-  do_check_eq(0, failed.length);
-
-  // The system addon should still not be userDisabled.
-  do_check_false(getAddonFromAddonManagerByID(SYSTEM_ADDON_ID).userDisabled);
-
-  server.stop(run_next_test);
-});
-
 add_test(function test_wipe() {
   _("Ensures that wiping causes add-ons to be uninstalled.");
 
   let addon1 = installAddon("test_bootstrap1_1");
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
   store.wipe();
 
   let addon = getAddonFromAddonManagerByID(addon1.id);
   do_check_eq(null, addon);
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
+
   run_next_test();
 });
 
@@ -515,6 +448,7 @@ add_test(function test_wipe_and_install() {
   let record = createRecordForThisApp(installed.syncGUID, installed.id, true,
                                       false);
 
+  Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
   store.wipe();
 
   let deleted = getAddonFromAddonManagerByID(installed.id);
@@ -528,6 +462,7 @@ add_test(function test_wipe_and_install() {
   let fetched = getAddonFromAddonManagerByID(record.addonID);
   do_check_true(!!fetched);
 
+  Svc.Prefs.reset("addons.ignoreRepositoryChecking");
   server.stop(run_next_test);
 });
 
diff --git a/services/sync/tests/unit/test_addons_tracker.js b/services/sync/tests/unit/test_addons_tracker.js
index 01bf37ab9..690a57d03 100644
--- a/services/sync/tests/unit/test_addons_tracker.js
+++ b/services/sync/tests/unit/test_addons_tracker.js
@@ -11,13 +11,14 @@ Cu.import("resource://services-sync/util.js");
 
 loadAddonTestFunctions();
 startupManager();
+Svc.Prefs.set("addons.ignoreRepositoryChecking", true);
 Svc.Prefs.set("engine.addons", true);
 
 Service.engineManager.register(AddonsEngine);
-var engine     = Service.engineManager.get("addons");
-var reconciler = engine._reconciler;
-var store      = engine._store;
-var tracker    = engine._tracker;
+let engine     = Service.engineManager.get("addons");
+let reconciler = engine._reconciler;
+let store      = engine._store;
+let tracker    = engine._tracker;
 
 // Don't write out by default.
 tracker.persistChangedIDs = false;
diff --git a/services/sync/tests/unit/test_bookmark_duping.js b/services/sync/tests/unit/test_bookmark_duping.js
deleted file mode 100644
index 1e6c6ed2e..000000000
--- a/services/sync/tests/unit/test_bookmark_duping.js
+++ /dev/null
@@ -1,644 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://services-common/async.js");
-Cu.import("resource://gre/modules/Log.jsm");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/bookmarks.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://services-sync/bookmark_validator.js");
-
-
-initTestLogging("Trace");
-
-const bms = PlacesUtils.bookmarks;
-
-Service.engineManager.register(BookmarksEngine);
-
-const engine = new BookmarksEngine(Service);
-const store = engine._store;
-store._log.level = Log.Level.Trace;
-engine._log.level = Log.Level.Trace;
-
-function promiseOneObserver(topic) {
-  return new Promise((resolve, reject) => {
-    let observer = function(subject, topic, data) {
-      Services.obs.removeObserver(observer, topic);
-      resolve({ subject: subject, data: data });
-    }
-    Services.obs.addObserver(observer, topic, false);
-  });
-}
-
-function setup() {
- let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {bookmarks: {version: engine.version,
-                                          syncID: engine.syncID}}}},
-    bookmarks: {},
-  });
-
-  generateNewKeys(Service.collectionKeys);
-
-  new SyncTestingInfrastructure(server.server);
-
-  let collection = server.user("foo").collection("bookmarks");
-
-  Svc.Obs.notify("weave:engine:start-tracking");   // We skip usual startup...
-
-  return { server, collection };
-}
-
-function* cleanup(server) {
-  Svc.Obs.notify("weave:engine:stop-tracking");
-  Services.prefs.setBoolPref("services.sync-testing.startOverKeepIdentity", true);
-  let promiseStartOver = promiseOneObserver("weave:service:start-over:finish");
-  Service.startOver();
-  yield promiseStartOver;
-  yield new Promise(resolve => server.stop(resolve));
-  yield bms.eraseEverything();
-}
-
-function getFolderChildrenIDs(folderId) {
-  let index = 0;
-  let result = [];
-  while (true) {
-    let childId = bms.getIdForItemAt(folderId, index);
-    if (childId == -1) {
-      break;
-    }
-    result.push(childId);
-    index++;
-  }
-  return result;
-}
-
-function createFolder(parentId, title) {
-  let id = bms.createFolder(parentId, title, 0);
-  let guid = store.GUIDForId(id);
-  return { id, guid };
-}
-
-function createBookmark(parentId, url, title, index = bms.DEFAULT_INDEX) {
-  let uri = Utils.makeURI(url);
-  let id = bms.insertBookmark(parentId, uri, index, title)
-  let guid = store.GUIDForId(id);
-  return { id, guid };
-}
-
-function getServerRecord(collection, id) {
-  let wbo = collection.get({ full: true, ids: [id] });
-  // Whew - lots of json strings inside strings.
-  return JSON.parse(JSON.parse(JSON.parse(wbo).payload).ciphertext);
-}
-
-function* promiseNoLocalItem(guid) {
-  // Check there's no item with the specified guid.
-  let got = yield bms.fetch({ guid });
-  ok(!got, `No record remains with GUID ${guid}`);
-  // and while we are here ensure the places cache doesn't still have it.
-  yield Assert.rejects(PlacesUtils.promiseItemId(guid));
-}
-
-function* validate(collection, expectedFailures = []) {
-  let validator = new BookmarkValidator();
-  let records = collection.payloads();
-
-  let problems = validator.inspectServerRecords(records).problemData;
-  // all non-zero problems.
-  let summary = problems.getSummary().filter(prob => prob.count != 0);
-
-  // split into 2 arrays - expected and unexpected.
-  let isInExpectedFailures = elt =>  {
-    for (let i = 0; i < expectedFailures.length; i++) {
-      if (elt.name == expectedFailures[i].name && elt.count == expectedFailures[i].count) {
-        return true;
-      }
-    }
-    return false;
-  }
-  let expected = [];
-  let unexpected = [];
-  for (let elt of summary) {
-    (isInExpectedFailures(elt) ? expected : unexpected).push(elt);
-  }
-  if (unexpected.length || expected.length != expectedFailures.length) {
-    do_print("Validation failed:");
-    do_print(JSON.stringify(summary));
-    // print the entire validator output as it has IDs etc.
-    do_print(JSON.stringify(problems, undefined, 2));
-    // All server records and the entire bookmark tree.
-    do_print("Server records:\n" + JSON.stringify(collection.payloads(), undefined, 2));
-    let tree = yield PlacesUtils.promiseBookmarksTree("", { includeItemIds: true });
-    do_print("Local bookmark tree:\n" + JSON.stringify(tree, undefined, 2));
-    ok(false);
-  }
-}
-
-add_task(function* test_dupe_bookmark() {
-  _("Ensure that a bookmark we consider a dupe is handled correctly.");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-
-    engine.sync();
-
-    // We've added the bookmark, its parent (folder1) plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 6);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-
-    // Now create a new incoming record that looks alot like a dupe.
-    let newGUID = Utils.makeGUID();
-    let to_apply = {
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: folder1_guid,
-    };
-
-    collection.insert(newGUID, encryptPayload(to_apply), Date.now() / 1000 + 10);
-    _("Syncing so new dupe record is processed");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // We should have logically deleted the dupe record.
-    equal(collection.count(), 7);
-    ok(getServerRecord(collection, bmk1_guid).deleted);
-    // and physically removed from the local store.
-    yield promiseNoLocalItem(bmk1_guid);
-    // Parent should still only have 1 item.
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-    // The parent record on the server should now reference the new GUID and not the old.
-    let serverRecord = getServerRecord(collection, folder1_guid);
-    ok(!serverRecord.children.includes(bmk1_guid));
-    ok(serverRecord.children.includes(newGUID));
-
-    // and a final sanity check - use the validator
-    yield validate(collection);
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_reparented_bookmark() {
-  _("Ensure that a bookmark we consider a dupe from a different parent is handled correctly");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-    // Another parent folder *with the same name*
-    let {id: folder2_id, guid: folder2_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-
-    do_print(`folder1_guid=${folder1_guid}, folder2_guid=${folder2_guid}, bmk1_guid=${bmk1_guid}`);
-
-    engine.sync();
-
-    // We've added the bookmark, 2 folders plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 7);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-    equal(getFolderChildrenIDs(folder2_id).length, 0);
-
-    // Now create a new incoming record that looks alot like a dupe of the
-    // item in folder1_guid, but with a record that points to folder2_guid.
-    let newGUID = Utils.makeGUID();
-    let to_apply = {
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: folder2_guid,
-    };
-
-    collection.insert(newGUID, encryptPayload(to_apply), Date.now() / 1000 + 10);
-
-    _("Syncing so new dupe record is processed");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // We should have logically deleted the dupe record.
-    equal(collection.count(), 8);
-    ok(getServerRecord(collection, bmk1_guid).deleted);
-    // and physically removed from the local store.
-    yield promiseNoLocalItem(bmk1_guid);
-    // The original folder no longer has the item
-    equal(getFolderChildrenIDs(folder1_id).length, 0);
-    // But the second dupe folder does.
-    equal(getFolderChildrenIDs(folder2_id).length, 1);
-
-    // The record for folder1 on the server should reference neither old or new GUIDs.
-    let serverRecord1 = getServerRecord(collection, folder1_guid);
-    ok(!serverRecord1.children.includes(bmk1_guid));
-    ok(!serverRecord1.children.includes(newGUID));
-
-    // The record for folder2 on the server should only reference the new new GUID.
-    let serverRecord2 = getServerRecord(collection, folder2_guid);
-    ok(!serverRecord2.children.includes(bmk1_guid));
-    ok(serverRecord2.children.includes(newGUID));
-
-    // and a final sanity check - use the validator
-    yield validate(collection);
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_reparented_locally_changed_bookmark() {
-  _("Ensure that a bookmark with local changes we consider a dupe from a different parent is handled correctly");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-    // Another parent folder *with the same name*
-    let {id: folder2_id, guid: folder2_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-
-    do_print(`folder1_guid=${folder1_guid}, folder2_guid=${folder2_guid}, bmk1_guid=${bmk1_guid}`);
-
-    engine.sync();
-
-    // We've added the bookmark, 2 folders plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 7);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-    equal(getFolderChildrenIDs(folder2_id).length, 0);
-
-    // Now create a new incoming record that looks alot like a dupe of the
-    // item in folder1_guid, but with a record that points to folder2_guid.
-    let newGUID = Utils.makeGUID();
-    let to_apply = {
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: folder2_guid,
-    };
-
-    collection.insert(newGUID, encryptPayload(to_apply), Date.now() / 1000 + 10);
-
-    // Make a change to the bookmark that's a dupe, and set the modification
-    // time further in the future than the incoming record. This will cause
-    // us to issue the infamous "DATA LOSS" warning in the logs but cause us
-    // to *not* apply the incoming record.
-    engine._tracker.addChangedID(bmk1_guid, Date.now() / 1000 + 60);
-
-    _("Syncing so new dupe record is processed");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // We should have logically deleted the dupe record.
-    equal(collection.count(), 8);
-    ok(getServerRecord(collection, bmk1_guid).deleted);
-    // and physically removed from the local store.
-    yield promiseNoLocalItem(bmk1_guid);
-    // The original folder still longer has the item
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-    // The second folder does not.
-    equal(getFolderChildrenIDs(folder2_id).length, 0);
-
-    // The record for folder1 on the server should reference only the GUID.
-    let serverRecord1 = getServerRecord(collection, folder1_guid);
-    ok(!serverRecord1.children.includes(bmk1_guid));
-    ok(serverRecord1.children.includes(newGUID));
-
-    // The record for folder2 on the server should reference nothing.
-    let serverRecord2 = getServerRecord(collection, folder2_guid);
-    ok(!serverRecord2.children.includes(bmk1_guid));
-    ok(!serverRecord2.children.includes(newGUID));
-
-    // and a final sanity check - use the validator
-    yield validate(collection);
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_reparented_to_earlier_appearing_parent_bookmark() {
-  _("Ensure that a bookmark we consider a dupe from a different parent that " +
-    "appears in the same sync before the dupe item");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-    // One more folder we'll use later.
-    let {id: folder2_id, guid: folder2_guid} = createFolder(bms.toolbarFolder, "A second folder");
-
-    do_print(`folder1=${folder1_guid}, bmk1=${bmk1_guid} folder2=${folder2_guid}`);
-
-    engine.sync();
-
-    // We've added the bookmark, 2 folders plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 7);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-
-    let newGUID = Utils.makeGUID();
-    let newParentGUID = Utils.makeGUID();
-
-    // Have the new parent appear before the dupe item.
-    collection.insert(newParentGUID, encryptPayload({
-      id: newParentGUID,
-      type: "folder",
-      title: "Folder 1",
-      parentName: "A second folder",
-      parentid: folder2_guid,
-      children: [newGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    // And also the update to "folder 2" that references the new parent.
-    collection.insert(folder2_guid, encryptPayload({
-      id: folder2_guid,
-      type: "folder",
-      title: "A second folder",
-      parentName: "Bookmarks Toolbar",
-      parentid: "toolbar",
-      children: [newParentGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    // Now create a new incoming record that looks alot like a dupe of the
-    // item in folder1_guid, with a record that points to a parent with the
-    // same name which appeared earlier in this sync.
-    collection.insert(newGUID, encryptPayload({
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: newParentGUID,
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-
-    _("Syncing so new records are processed.");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // Everything should be parented correctly.
-    equal(getFolderChildrenIDs(folder1_id).length, 0);
-    let newParentID = store.idForGUID(newParentGUID);
-    let newID = store.idForGUID(newGUID);
-    deepEqual(getFolderChildrenIDs(newParentID), [newID]);
-
-    // Make sure the validator thinks everything is hunky-dory.
-    yield validate(collection);
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_reparented_to_later_appearing_parent_bookmark() {
-  _("Ensure that a bookmark we consider a dupe from a different parent that " +
-    "doesn't exist locally as we process the child, but does appear in the same sync");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-    // One more folder we'll use later.
-    let {id: folder2_id, guid: folder2_guid} = createFolder(bms.toolbarFolder, "A second folder");
-
-    do_print(`folder1=${folder1_guid}, bmk1=${bmk1_guid} folder2=${folder2_guid}`);
-
-    engine.sync();
-
-    // We've added the bookmark, 2 folders plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 7);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-
-    // Now create a new incoming record that looks alot like a dupe of the
-    // item in folder1_guid, but with a record that points to a parent with the
-    // same name, but a non-existing local ID.
-    let newGUID = Utils.makeGUID();
-    let newParentGUID = Utils.makeGUID();
-
-    collection.insert(newGUID, encryptPayload({
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: newParentGUID,
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    // Now have the parent appear after (so when the record above is processed
-    // this is still unknown.)
-    collection.insert(newParentGUID, encryptPayload({
-      id: newParentGUID,
-      type: "folder",
-      title: "Folder 1",
-      parentName: "A second folder",
-      parentid: folder2_guid,
-      children: [newGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-    // And also the update to "folder 2" that references the new parent.
-    collection.insert(folder2_guid, encryptPayload({
-      id: folder2_guid,
-      type: "folder",
-      title: "A second folder",
-      parentName: "Bookmarks Toolbar",
-      parentid: "toolbar",
-      children: [newParentGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    _("Syncing so out-of-order records are processed.");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // The intended parent did end up existing, so it should be parented
-    // correctly after de-duplication.
-    equal(getFolderChildrenIDs(folder1_id).length, 0);
-    let newParentID = store.idForGUID(newParentGUID);
-    let newID = store.idForGUID(newGUID);
-    deepEqual(getFolderChildrenIDs(newParentID), [newID]);
-
-    // Make sure the validator thinks everything is hunky-dory.
-    yield validate(collection);
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_reparented_to_future_arriving_parent_bookmark() {
-  _("Ensure that a bookmark we consider a dupe from a different parent that " +
-    "doesn't exist locally and doesn't appear in this Sync is handled correctly");
-
-  let { server, collection } = this.setup();
-
-  try {
-    // The parent folder and one bookmark in it.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-    let {id: bmk1_id, guid: bmk1_guid} = createBookmark(folder1_id, "http://getfirefox.com/", "Get Firefox!");
-    // One more folder we'll use later.
-    let {id: folder2_id, guid: folder2_guid} = createFolder(bms.toolbarFolder, "A second folder");
-
-    do_print(`folder1=${folder1_guid}, bmk1=${bmk1_guid} folder2=${folder2_guid}`);
-
-    engine.sync();
-
-    // We've added the bookmark, 2 folders plus "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 7);
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-
-    // Now create a new incoming record that looks alot like a dupe of the
-    // item in folder1_guid, but with a record that points to a parent with the
-    // same name, but a non-existing local ID.
-    let newGUID = Utils.makeGUID();
-    let newParentGUID = Utils.makeGUID();
-
-    collection.insert(newGUID, encryptPayload({
-      id: newGUID,
-      bmkUri: "http://getfirefox.com/",
-      type: "bookmark",
-      title: "Get Firefox!",
-      parentName: "Folder 1",
-      parentid: newParentGUID,
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    _("Syncing so new dupe record is processed");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // We should have logically deleted the dupe record.
-    equal(collection.count(), 8);
-    ok(getServerRecord(collection, bmk1_guid).deleted);
-    // and physically removed from the local store.
-    yield promiseNoLocalItem(bmk1_guid);
-    // The intended parent doesn't exist, so it remains in the original folder
-    equal(getFolderChildrenIDs(folder1_id).length, 1);
-
-    // The record for folder1 on the server should reference the new GUID.
-    let serverRecord1 = getServerRecord(collection, folder1_guid);
-    ok(!serverRecord1.children.includes(bmk1_guid));
-    ok(serverRecord1.children.includes(newGUID));
-
-    // As the incoming parent is missing the item should have been annotated
-    // with that missing parent.
-    equal(PlacesUtils.annotations.getItemAnnotation(store.idForGUID(newGUID), "sync/parent"),
-          newParentGUID);
-
-    // Check the validator. Sadly, this is known to cause a mismatch between
-    // the server and client views of the tree.
-    let expected = [
-      // We haven't fixed the incoming record that referenced the missing parent.
-      { name: "orphans", count: 1 },
-    ];
-    yield validate(collection, expected);
-
-    // Now have the parent magically appear in a later sync - but
-    // it appears as being in a different parent from our existing "Folder 1",
-    // so the folder itself isn't duped.
-    collection.insert(newParentGUID, encryptPayload({
-      id: newParentGUID,
-      type: "folder",
-      title: "Folder 1",
-      parentName: "A second folder",
-      parentid: folder2_guid,
-      children: [newGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-    // We also queue an update to "folder 2" that references the new parent.
-    collection.insert(folder2_guid, encryptPayload({
-      id: folder2_guid,
-      type: "folder",
-      title: "A second folder",
-      parentName: "Bookmarks Toolbar",
-      parentid: "toolbar",
-      children: [newParentGUID],
-      tags: [],
-    }), Date.now() / 1000 + 10);
-
-    _("Syncing so missing parent appears");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    // The intended parent now does exist, so it should have been reparented.
-    equal(getFolderChildrenIDs(folder1_id).length, 0);
-    let newParentID = store.idForGUID(newParentGUID);
-    let newID = store.idForGUID(newGUID);
-    deepEqual(getFolderChildrenIDs(newParentID), [newID]);
-
-    // validation now has different errors :(
-    expected = [
-      // The validator reports multipleParents because:
-      // * The incoming record newParentGUID still (and correctly) references
-      //   newGUID as a child.
-      // * Our original Folder1 was updated to include newGUID when it
-      //   originally de-deuped and couldn't find the parent.
-      // * When the parent *did* eventually arrive we used the parent annotation
-      //   to correctly reparent - but that reparenting process does not change
-      //   the server record.
-      // Hence, newGUID is a child of both those server records :(
-      { name: "multipleParents", count: 1 },
-    ];
-    yield validate(collection, expected);
-
-  } finally {
-    yield cleanup(server);
-  }
-});
-
-add_task(function* test_dupe_empty_folder() {
-  _("Ensure that an empty folder we consider a dupe is handled correctly.");
-  // Empty folders aren't particularly interesting in practice (as that seems
-  // an edge-case) but duping folders with items is broken - bug 1293163.
-  let { server, collection } = this.setup();
-
-  try {
-    // The folder we will end up duping away.
-    let {id: folder1_id, guid: folder1_guid } = createFolder(bms.toolbarFolder, "Folder 1");
-
-    engine.sync();
-
-    // We've added 1 folder, "menu", "toolbar", "unfiled", and "mobile".
-    equal(collection.count(), 5);
-
-    // Now create new incoming records that looks alot like a dupe of "Folder 1".
-    let newFolderGUID = Utils.makeGUID();
-    collection.insert(newFolderGUID, encryptPayload({
-      id: newFolderGUID,
-      type: "folder",
-      title: "Folder 1",
-      parentName: "Bookmarks Toolbar",
-      parentid: "toolbar",
-      children: [],
-    }), Date.now() / 1000 + 10);
-
-    _("Syncing so new dupe records are processed");
-    engine.lastSync = engine.lastSync - 0.01;
-    engine.sync();
-
-    yield validate(collection);
-
-    // Collection now has one additional record - the logically deleted dupe.
-    equal(collection.count(), 6);
-    // original folder should be logically deleted.
-    ok(getServerRecord(collection, folder1_guid).deleted);
-    yield promiseNoLocalItem(folder1_guid);
-  } finally {
-    yield cleanup(server);
-  }
-});
-// XXX - TODO - folders with children. Bug 1293163
diff --git a/services/sync/tests/unit/test_bookmark_engine.js b/services/sync/tests/unit/test_bookmark_engine.js
index 9de6c5c0d..bd4c740cb 100644
--- a/services/sync/tests/unit/test_bookmark_engine.js
+++ b/services/sync/tests/unit/test_bookmark_engine.js
@@ -2,10 +2,9 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://gre/modules/PlacesSyncUtils.jsm");
 Cu.import("resource://gre/modules/BookmarkJSONUtils.jsm");
+Cu.import("resource://services-common/async.js");
 Cu.import("resource://gre/modules/Log.jsm");
-Cu.import("resource://services-sync/constants.js");
 Cu.import("resource://services-sync/engines.js");
 Cu.import("resource://services-sync/engines/bookmarks.js");
 Cu.import("resource://services-sync/service.js");
@@ -13,168 +12,9 @@ Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 Cu.import("resource://gre/modules/Promise.jsm");
 
-initTestLogging("Trace");
-
 Service.engineManager.register(BookmarksEngine);
 
-function* assertChildGuids(folderGuid, expectedChildGuids, message) {
-  let tree = yield PlacesUtils.promiseBookmarksTree(folderGuid);
-  let childGuids = tree.children.map(child => child.guid);
-  deepEqual(childGuids, expectedChildGuids, message);
-}
-
-add_task(function* test_change_during_sync() {
-  _("Ensure that we track changes made during a sync.");
-
-  let engine  = new BookmarksEngine(Service);
-  let store   = engine._store;
-  let tracker = engine._tracker;
-  let server = serverForFoo(engine);
-  new SyncTestingInfrastructure(server.server);
-
-  let collection = server.user("foo").collection("bookmarks");
-
-  let bz_id = PlacesUtils.bookmarks.insertBookmark(
-    PlacesUtils.bookmarksMenuFolderId, Utils.makeURI("https://bugzilla.mozilla.org/"),
-    PlacesUtils.bookmarks.DEFAULT_INDEX, "Bugzilla");
-  let bz_guid = yield PlacesUtils.promiseItemGuid(bz_id);
-    _(`Bugzilla GUID: ${bz_guid}`);
-
-  Svc.Obs.notify("weave:engine:start-tracking");
-
-  try {
-    let folder1_id = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.toolbarFolder, "Folder 1", 0);
-    let folder1_guid = store.GUIDForId(folder1_id);
-    _(`Folder GUID: ${folder1_guid}`);
-
-    let bmk1_id = PlacesUtils.bookmarks.insertBookmark(
-      folder1_id, Utils.makeURI("http://getthunderbird.com/"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Thunderbird!");
-    let bmk1_guid = store.GUIDForId(bmk1_id);
-    _(`Thunderbird GUID: ${bmk1_guid}`);
-
-    // Sync is synchronous, so, to simulate a bookmark change made during a
-    // sync, we create a server record that adds a bookmark as a side effect.
-    let bmk2_guid = "get-firefox1"; // New child of Folder 1, created remotely.
-    let bmk3_id = -1; // New child of Folder 1, created locally during sync.
-    let folder2_guid = "folder2-1111"; // New folder, created remotely.
-    let tagQuery_guid = "tag-query111"; // New tag query child of Folder 2, created remotely.
-    let bmk4_guid = "example-org1"; // New tagged child of Folder 2, created remotely.
-    {
-      // An existing record changed on the server that should not trigger
-      // another sync when applied.
-      let bzBmk = new Bookmark("bookmarks", bz_guid);
-      bzBmk.bmkUri      = "https://bugzilla.mozilla.org/";
-      bzBmk.description = "New description";
-      bzBmk.title       = "Bugzilla";
-      bzBmk.tags        = ["new", "tags"];
-      bzBmk.parentName  = "Bookmarks Toolbar";
-      bzBmk.parentid    = "toolbar";
-      collection.insert(bz_guid, encryptPayload(bzBmk.cleartext));
-
-      let remoteFolder = new BookmarkFolder("bookmarks", folder2_guid);
-      remoteFolder.title      = "Folder 2";
-      remoteFolder.children   = [bmk4_guid, tagQuery_guid];
-      remoteFolder.parentName = "Bookmarks Menu";
-      remoteFolder.parentid   = "menu";
-      collection.insert(folder2_guid, encryptPayload(remoteFolder.cleartext));
-
-      let localFxBmk = new Bookmark("bookmarks", bmk2_guid);
-      localFxBmk.bmkUri        = "http://getfirefox.com/";
-      localFxBmk.description   = "Firefox is awesome.";
-      localFxBmk.title         = "Get Firefox!";
-      localFxBmk.tags          = ["firefox", "awesome", "browser"];
-      localFxBmk.keyword       = "awesome";
-      localFxBmk.loadInSidebar = false;
-      localFxBmk.parentName    = "Folder 1";
-      localFxBmk.parentid      = folder1_guid;
-      let remoteFxBmk = collection.insert(bmk2_guid, encryptPayload(localFxBmk.cleartext));
-      remoteFxBmk.get = function get() {
-        _("Inserting bookmark into local store");
-        bmk3_id = PlacesUtils.bookmarks.insertBookmark(
-          folder1_id, Utils.makeURI("https://mozilla.org/"),
-          PlacesUtils.bookmarks.DEFAULT_INDEX, "Mozilla");
-
-        return ServerWBO.prototype.get.apply(this, arguments);
-      };
-
-      // A tag query referencing a nonexistent tag folder, which we should
-      // create locally when applying the record.
-      let localTagQuery = new BookmarkQuery("bookmarks", tagQuery_guid);
-      localTagQuery.bmkUri     = "place:type=7&folder=999";
-      localTagQuery.title      = "Taggy tags";
-      localTagQuery.folderName = "taggy";
-      localTagQuery.parentName = "Folder 2";
-      localTagQuery.parentid   = folder2_guid;
-      collection.insert(tagQuery_guid, encryptPayload(localTagQuery.cleartext));
-
-      // A bookmark that should appear in the results for the tag query.
-      let localTaggedBmk = new Bookmark("bookmarks", bmk4_guid);
-      localTaggedBmk.bmkUri     = "https://example.org";
-      localTaggedBmk.title      = "Tagged bookmark";
-      localTaggedBmk.tags       = ["taggy"];
-      localTaggedBmk.parentName = "Folder 2";
-      localTaggedBmk.parentid   = folder2_guid;
-      collection.insert(bmk4_guid, encryptPayload(localTaggedBmk.cleartext));
-    }
-
-    yield* assertChildGuids(folder1_guid, [bmk1_guid], "Folder should have 1 child before first sync");
-
-    _("Perform first sync");
-    {
-      let changes = engine.pullNewChanges();
-      deepEqual(changes.ids().sort(), [folder1_guid, bmk1_guid, "toolbar"].sort(),
-        "Should track bookmark and folder created before first sync");
-      yield sync_engine_and_validate_telem(engine, false);
-    }
-
-    let bmk2_id = store.idForGUID(bmk2_guid);
-    let bmk3_guid = store.GUIDForId(bmk3_id);
-    _(`Mozilla GUID: ${bmk3_guid}`);
-    {
-      equal(store.GUIDForId(bmk2_id), bmk2_guid,
-        "Remote bookmark should be applied during first sync");
-      ok(bmk3_id > -1,
-        "Bookmark created during first sync should exist locally");
-      ok(!collection.wbo(bmk3_guid),
-        "Bookmark created during first sync shouldn't be uploaded yet");
-
-      yield* assertChildGuids(folder1_guid, [bmk1_guid, bmk3_guid, bmk2_guid],
-        "Folder 1 should have 3 children after first sync");
-      yield* assertChildGuids(folder2_guid, [bmk4_guid, tagQuery_guid],
-        "Folder 2 should have 2 children after first sync");
-      let taggedURIs = PlacesUtils.tagging.getURIsForTag("taggy");
-      equal(taggedURIs.length, 1, "Should have 1 tagged URI");
-      equal(taggedURIs[0].spec, "https://example.org/",
-        "Synced tagged bookmark should appear in tagged URI list");
-    }
-
-    _("Perform second sync");
-    {
-      let changes = engine.pullNewChanges();
-      deepEqual(changes.ids().sort(), [bmk3_guid, folder1_guid].sort(),
-        "Should track bookmark added during last sync and its parent");
-      yield sync_engine_and_validate_telem(engine, false);
-
-      ok(collection.wbo(bmk3_guid),
-        "Bookmark created during first sync should be uploaded during second sync");
-
-      yield* assertChildGuids(folder1_guid, [bmk1_guid, bmk3_guid, bmk2_guid],
-        "Folder 1 should have same children after second sync");
-      yield* assertChildGuids(folder2_guid, [bmk4_guid, tagQuery_guid],
-        "Folder 2 should have same children after second sync");
-    }
-  } finally {
-    store.wipe();
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    yield new Promise(resolve => server.stop(resolve));
-    Svc.Obs.notify("weave:engine:stop-tracking");
-  }
-});
-
-add_task(function* bad_record_allIDs() {
+add_test(function bad_record_allIDs() {
   let server = new SyncServer();
   server.start();
   let syncTesting = new SyncTestingInfrastructure(server.server);
@@ -192,6 +32,9 @@ add_task(function* bad_record_allIDs() {
   _("Record is " + badRecordID);
   _("Type: " + PlacesUtils.bookmarks.getItemType(badRecordID));
 
+  _("Fetching children.");
+  store._getChildren("toolbar", {});
+
   _("Fetching all IDs.");
   let all = store.getAllIDs();
 
@@ -201,7 +44,49 @@ add_task(function* bad_record_allIDs() {
 
   _("Clean up.");
   PlacesUtils.bookmarks.removeItem(badRecordID);
-  yield new Promise(r => server.stop(r));
+  server.stop(run_next_test);
+});
+
+add_test(function test_ID_caching() {
+  let server = new SyncServer();
+  server.start();
+  let syncTesting = new SyncTestingInfrastructure(server.server);
+
+  _("Ensure that Places IDs are not cached.");
+  let engine = new BookmarksEngine(Service);
+  let store = engine._store;
+  _("All IDs: " + JSON.stringify(store.getAllIDs()));
+
+  let mobileID = store.idForGUID("mobile");
+  _("Change the GUID for that item, and drop the mobile anno.");
+  store._setGUID(mobileID, "abcdefghijkl");
+  PlacesUtils.annotations.removeItemAnnotation(mobileID, "mobile/bookmarksRoot");
+
+  let err;
+  let newMobileID;
+
+  // With noCreate, we don't find an entry.
+  try {
+    newMobileID = store.idForGUID("mobile", true);
+    _("New mobile ID: " + newMobileID);
+  } catch (ex) {
+    err = ex;
+    _("Error: " + Utils.exceptionStr(err));
+  }
+
+  do_check_true(!err);
+
+  // With !noCreate, lookup works, and it's different.
+  newMobileID = store.idForGUID("mobile", false);
+  _("New mobile ID: " + newMobileID);
+  do_check_true(!!newMobileID);
+  do_check_neq(newMobileID, mobileID);
+
+  // And it's repeatable, even with creation enabled.
+  do_check_eq(newMobileID, store.idForGUID("mobile", false));
+
+  do_check_eq(store.GUIDForId(mobileID), "abcdefghijkl");
+  server.stop(run_next_test);
 });
 
 function serverForFoo(engine) {
@@ -212,7 +97,7 @@ function serverForFoo(engine) {
   });
 }
 
-add_task(function* test_processIncoming_error_orderChildren() {
+add_test(function test_processIncoming_error_orderChildren() {
   _("Ensure that _orderChildren() is called even when _processIncoming() throws an error.");
 
   let engine = new BookmarksEngine(Service);
@@ -259,11 +144,11 @@ add_task(function* test_processIncoming_error_orderChildren() {
 
     let error;
     try {
-      yield sync_engine_and_validate_telem(engine, true)
+      engine.sync();
     } catch(ex) {
       error = ex;
     }
-    ok(!!error);
+    do_check_true(!!error);
 
     // Verify that the bookmark order has been applied.
     let new_children = store.createRecord(folder1_guid).children;
@@ -278,11 +163,11 @@ add_task(function* test_processIncoming_error_orderChildren() {
     store.wipe();
     Svc.Prefs.resetBranch("");
     Service.recordManager.clearCache();
-    yield new Promise(resolve => server.stop(resolve));
+    server.stop(run_next_test);
   }
 });
 
-add_task(function* test_restorePromptsReupload() {
+add_task(function test_restorePromptsReupload() {
   _("Ensure that restoring from a backup will reupload all records.");
   let engine = new BookmarksEngine(Service);
   let store  = engine._store;
@@ -319,7 +204,8 @@ add_task(function* test_restorePromptsReupload() {
     backupFile.append("t_b_e_" + Date.now() + ".json");
 
     _("Backing up to file " + backupFile.path);
-    yield BookmarkJSONUtils.exportToFile(backupFile.path);
+    backupFile.create(Ci.nsILocalFile.NORMAL_FILE_TYPE, 0600);
+    yield BookmarkJSONUtils.exportToFile(backupFile);
 
     _("Create a different record and sync.");
     let bmk2_id = PlacesUtils.bookmarks.insertBookmark(
@@ -331,17 +217,17 @@ add_task(function* test_restorePromptsReupload() {
 
     let error;
     try {
-      yield sync_engine_and_validate_telem(engine, false);
+      engine.sync();
     } catch(ex) {
       error = ex;
-      _("Got error: " + Log.exceptionStr(ex));
+      _("Got error: " + Utils.exceptionStr(ex));
     }
     do_check_true(!error);
 
     _("Verify that there's only one bookmark on the server, and it's Thunderbird.");
     // Of course, there's also the Bookmarks Toolbar and Bookmarks Menu...
     let wbos = collection.keys(function (id) {
-      return ["menu", "toolbar", "mobile", "unfiled", folder1_guid].indexOf(id) == -1;
+      return ["menu", "toolbar", "mobile", folder1_guid].indexOf(id) == -1;
     });
     do_check_eq(wbos.length, 1);
     do_check_eq(wbos[0], bmk2_guid);
@@ -371,14 +257,14 @@ add_task(function* test_restorePromptsReupload() {
     do_check_true(found);
 
     _("Have the correct number of IDs locally, too.");
-    do_check_eq(count, ["menu", "toolbar", "mobile", "unfiled", folder1_id, bmk1_id].length);
+    do_check_eq(count, ["menu", "toolbar", folder1_id, bmk1_id].length);
 
     _("Sync again. This'll wipe bookmarks from the server.");
     try {
-      yield sync_engine_and_validate_telem(engine, false);
+      engine.sync();
     } catch(ex) {
       error = ex;
-      _("Got error: " + Log.exceptionStr(ex));
+      _("Got error: " + Utils.exceptionStr(ex));
     }
     do_check_true(!error);
 
@@ -391,9 +277,7 @@ add_task(function* test_restorePromptsReupload() {
     let folderWBOs   = payloads.filter(function (wbo) {
                          return ((wbo.type == "folder") &&
                                  (wbo.id   != "menu") &&
-                                 (wbo.id   != "toolbar") &&
-                                 (wbo.id   != "unfiled") &&
-                                 (wbo.id   != "mobile"));
+                                 (wbo.id   != "toolbar"));
                        });
 
     do_check_eq(bookmarkWBOs.length, 1);
@@ -420,12 +304,10 @@ function FakeRecord(constructor, r) {
   for (let x in r) {
     this[x] = r[x];
   }
-  // Borrow the constructor's conversion functions.
-  this.toSyncBookmark = constructor.prototype.toSyncBookmark;
 }
 
 // Bug 632287.
-add_task(function* test_mismatched_types() {
+add_test(function test_mismatched_types() {
   _("Ensure that handling a record that changes type causes deletion " +
     "then re-adding.");
 
@@ -437,7 +319,6 @@ add_task(function* test_mismatched_types() {
     "description":null,
     "parentid": "toolbar"
   };
-  oldRecord.cleartext = oldRecord;
 
   let newRecord = {
     "id": "l1nZZXfB8nC7",
@@ -453,7 +334,6 @@ add_task(function* test_mismatched_types() {
        "oT74WwV8_j4P", "IztsItWVSo3-"],
     "parentid": "toolbar"
   };
-  newRecord.cleartext = newRecord;
 
   let engine = new BookmarksEngine(Service);
   let store  = engine._store;
@@ -466,8 +346,8 @@ add_task(function* test_mismatched_types() {
     let bms = PlacesUtils.bookmarks;
     let oldR = new FakeRecord(BookmarkFolder, oldRecord);
     let newR = new FakeRecord(Livemark, newRecord);
-    oldR.parentid = PlacesUtils.bookmarks.toolbarGuid;
-    newR.parentid = PlacesUtils.bookmarks.toolbarGuid;
+    oldR._parent = PlacesUtils.bookmarks.toolbarFolder;
+    newR._parent = PlacesUtils.bookmarks.toolbarFolder;
 
     store.applyIncoming(oldR);
     _("Applied old. It's a folder.");
@@ -490,11 +370,11 @@ add_task(function* test_mismatched_types() {
     store.wipe();
     Svc.Prefs.resetBranch("");
     Service.recordManager.clearCache();
-    yield new Promise(r => server.stop(r));
+    server.stop(run_next_test);
   }
 });
 
-add_task(function* test_bookmark_guidMap_fail() {
+add_test(function test_bookmark_guidMap_fail() {
   _("Ensure that failures building the GUID map cause early death.");
 
   let engine = new BookmarksEngine(Service);
@@ -514,9 +394,7 @@ add_task(function* test_bookmark_guidMap_fail() {
   engine.lastSync = 1;   // So we don't back up.
 
   // Make building the GUID map fail.
-
-  let pbt = PlacesUtils.promiseBookmarksTree;
-  PlacesUtils.promiseBookmarksTree = function() { return Promise.reject("Nooo"); };
+  store.getAllIDs = function () { throw "Nooo"; };
 
   // Ensure that we throw when accessing _guidMap.
   engine._syncStartup();
@@ -542,11 +420,26 @@ add_task(function* test_bookmark_guidMap_fail() {
   }
   do_check_eq(err, "Nooo");
 
-  PlacesUtils.promiseBookmarksTree = pbt;
-  yield new Promise(r => server.stop(r));
+  server.stop(run_next_test);
+});
+
+add_test(function test_bookmark_is_taggable() {
+  let engine = new BookmarksEngine(Service);
+  let store = engine._store;
+
+  do_check_true(store.isTaggable("bookmark"));
+  do_check_true(store.isTaggable("microsummary"));
+  do_check_true(store.isTaggable("query"));
+  do_check_false(store.isTaggable("folder"));
+  do_check_false(store.isTaggable("livemark"));
+  do_check_false(store.isTaggable(null));
+  do_check_false(store.isTaggable(undefined));
+  do_check_false(store.isTaggable(""));
+
+  run_next_test();
 });
 
-add_task(function* test_bookmark_tag_but_no_uri() {
+add_test(function test_bookmark_tag_but_no_uri() {
   _("Ensure that a bookmark record with tags, but no URI, doesn't throw an exception.");
 
   let engine = new BookmarksEngine(Service);
@@ -555,43 +448,30 @@ add_task(function* test_bookmark_tag_but_no_uri() {
   // We're simply checking that no exception is thrown, so
   // no actual checks in this test.
 
-  yield PlacesSyncUtils.bookmarks.insert({
-    kind: PlacesSyncUtils.bookmarks.KINDS.BOOKMARK,
-    syncId: Utils.makeGUID(),
-    parentSyncId: "toolbar",
-    url: "http://example.com",
-    tags: ["foo"],
-  });
-  yield PlacesSyncUtils.bookmarks.insert({
-    kind: PlacesSyncUtils.bookmarks.KINDS.BOOKMARK,
-    syncId: Utils.makeGUID(),
-    parentSyncId: "toolbar",
-    url: "http://example.org",
-    tags: null,
-  });
-  yield PlacesSyncUtils.bookmarks.insert({
-    kind: PlacesSyncUtils.bookmarks.KINDS.BOOKMARK,
-    syncId: Utils.makeGUID(),
-    url: "about:fake",
-    parentSyncId: "toolbar",
-    tags: null,
-  });
+  store._tagURI(null, ["foo"]);
+  store._tagURI(null, null);
+  store._tagURI(Utils.makeURI("about:fake"), null);
 
-  let record = new FakeRecord(BookmarkFolder, {
-    parentid:    "toolbar",
+  let record = {
+    _parent:     PlacesUtils.bookmarks.toolbarFolder,
     id:          Utils.makeGUID(),
     description: "",
     tags:        ["foo"],
     title:       "Taggy tag",
     type:        "folder"
-  });
+  };
+
+  // Because update() walks the cleartext.
+  record.cleartext = record;
 
   store.create(record);
   record.tags = ["bar"];
   store.update(record);
+
+  run_next_test();
 });
 
-add_task(function* test_misreconciled_root() {
+add_test(function test_misreconciled_root() {
   _("Ensure that we don't reconcile an arbitrary record with a root.");
 
   let engine = new BookmarksEngine(Service);
@@ -636,9 +516,6 @@ add_task(function* test_misreconciled_root() {
 
   _("Applying record.");
   engine._processIncoming({
-    getBatched() {
-      return this.get();
-    },
     get: function () {
       this.recordHandler(encrypted);
       return {success: true}
@@ -655,7 +532,7 @@ add_task(function* test_misreconciled_root() {
   do_check_eq(parentGUIDBefore, parentGUIDAfter);
   do_check_eq(parentIDBefore, parentIDAfter);
 
-  yield new Promise(r => server.stop(r));
+  server.stop(run_next_test);
 });
 
 function run_test() {
diff --git a/services/sync/tests/unit/test_bookmark_invalid.js b/services/sync/tests/unit/test_bookmark_invalid.js
deleted file mode 100644
index af476a7f9..000000000
--- a/services/sync/tests/unit/test_bookmark_invalid.js
+++ /dev/null
@@ -1,63 +0,0 @@
-Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://gre/modules/Log.jsm");
-Cu.import("resource://gre/modules/Task.jsm");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/bookmarks.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-
-Service.engineManager.register(BookmarksEngine);
-
-var engine = Service.engineManager.get("bookmarks");
-var store = engine._store;
-var tracker = engine._tracker;
-
-add_task(function* test_ignore_invalid_uri() {
-  _("Ensure that we don't die with invalid bookmarks.");
-
-  // First create a valid bookmark.
-  let bmid = PlacesUtils.bookmarks.insertBookmark(PlacesUtils.unfiledBookmarksFolderId,
-                                                  Services.io.newURI("http://example.com/", null, null),
-                                                  PlacesUtils.bookmarks.DEFAULT_INDEX,
-                                                  "the title");
-
-  // Now update moz_places with an invalid url.
-  yield PlacesUtils.withConnectionWrapper("test_ignore_invalid_uri", Task.async(function* (db) {
-    yield db.execute(
-      `UPDATE moz_places SET url = :url, url_hash = hash(:url)
-       WHERE id = (SELECT b.fk FROM moz_bookmarks b
-       WHERE b.id = :id LIMIT 1)`,
-      { id: bmid, url: "<invalid url>" });
-  }));
-
-  // Ensure that this doesn't throw even though the DB is now in a bad state (a
-  // bookmark has an illegal url).
-  engine._buildGUIDMap();
-});
-
-add_task(function* test_ignore_missing_uri() {
-  _("Ensure that we don't die with a bookmark referencing an invalid bookmark id.");
-
-  // First create a valid bookmark.
-  let bmid = PlacesUtils.bookmarks.insertBookmark(PlacesUtils.unfiledBookmarksFolderId,
-                                                  Services.io.newURI("http://example.com/", null, null),
-                                                  PlacesUtils.bookmarks.DEFAULT_INDEX,
-                                                  "the title");
-
-  // Now update moz_bookmarks to reference a non-existing places ID
-  yield PlacesUtils.withConnectionWrapper("test_ignore_missing_uri", Task.async(function* (db) {
-    yield db.execute(
-      `UPDATE moz_bookmarks SET fk = 999999
-       WHERE id = :id`
-      , { id: bmid });
-  }));
-
-  // Ensure that this doesn't throw even though the DB is now in a bad state (a
-  // bookmark has an illegal url).
-  engine._buildGUIDMap();
-});
-
-function run_test() {
-  initTestLogging('Trace');
-  run_next_test();
-}
diff --git a/services/sync/tests/unit/test_bookmark_legacy_microsummaries_support.js b/services/sync/tests/unit/test_bookmark_legacy_microsummaries_support.js
index 207372ed6..a7e3a4647 100644
--- a/services/sync/tests/unit/test_bookmark_legacy_microsummaries_support.js
+++ b/services/sync/tests/unit/test_bookmark_legacy_microsummaries_support.js
@@ -85,12 +85,12 @@ function run_test() {
   do_check_eq(PlacesUtils.bookmarks.getKeywordForBookmark(id), null);
 
   do_check_throws(
-    () => PlacesUtils.annotations.getItemAnnotation(id, GENERATORURI_ANNO),
+    function () PlacesUtils.annotations.getItemAnnotation(id, GENERATORURI_ANNO),
     Cr.NS_ERROR_NOT_AVAILABLE
   );
 
   do_check_throws(
-    () => PlacesUtils.annotations.getItemAnnotation(id, STATICTITLE_ANNO),
+    function () PlacesUtils.annotations.getItemAnnotation(id, STATICTITLE_ANNO),
     Cr.NS_ERROR_NOT_AVAILABLE
   );
 
diff --git a/services/sync/tests/unit/test_bookmark_livemarks.js b/services/sync/tests/unit/test_bookmark_livemarks.js
index 8adde76d8..d7cda091b 100644
--- a/services/sync/tests/unit/test_bookmark_livemarks.js
+++ b/services/sync/tests/unit/test_bookmark_livemarks.js
@@ -12,11 +12,11 @@ Cu.import("resource://testing-common/services/common/utils.js");
 
 const DESCRIPTION_ANNO = "bookmarkProperties/description";
 
-var engine = Service.engineManager.get("bookmarks");
-var store = engine._store;
+let engine = Service.engineManager.get("bookmarks");
+let store = engine._store;
 
 // Record borrowed from Bug 631361.
-var record631361 = {
+let record631361 = {
   id: "M5bwUKK8hPyF",
   index: 150,
   modified: 1296768176.49,
@@ -103,11 +103,20 @@ add_test(function test_livemark_descriptions() {
 add_test(function test_livemark_invalid() {
   _("Livemarks considered invalid by nsLivemarkService are skipped.");
 
+  _("Parent is 0, which is invalid. Will be set to unfiled.");
+  let noParentRec = makeLivemark(record631361.payload, true);
+  noParentRec._parent = 0;
+  store.create(noParentRec);
+  let recID = store.idForGUID(noParentRec.id, true);
+  do_check_true(recID > 0);
+  do_check_eq(PlacesUtils.bookmarks.getFolderIdForItem(recID), PlacesUtils.bookmarks.unfiledBookmarksFolder);
+
   _("Parent is unknown. Will be set to unfiled.");
   let lateParentRec = makeLivemark(record631361.payload, true);
   let parentGUID = Utils.makeGUID();
   lateParentRec.parentid = parentGUID;
-  do_check_eq(-1, store.idForGUID(parentGUID));
+  lateParentRec._parent = store.idForGUID(parentGUID);   // Usually done by applyIncoming.
+  do_check_eq(-1, lateParentRec._parent);
 
   store.create(lateParentRec);
   recID = store.idForGUID(lateParentRec.id, true);
@@ -124,7 +133,7 @@ add_test(function test_livemark_invalid() {
 
   _("Parent is a Livemark. Will be skipped.");
   let lmParentRec = makeLivemark(record631361.payload, true);
-  lmParentRec.parentid = store.GUIDForId(recID);
+  lmParentRec._parent = recID;
   store.create(lmParentRec);
   // No exception, but no creation occurs.
   do_check_eq(-1, store.idForGUID(lmParentRec.id, true));
diff --git a/services/sync/tests/unit/test_bookmark_order.js b/services/sync/tests/unit/test_bookmark_order.js
index 7625a813f..56806dba0 100644
--- a/services/sync/tests/unit/test_bookmark_order.js
+++ b/services/sync/tests/unit/test_bookmark_order.js
@@ -2,61 +2,53 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 _("Making sure after processing incoming bookmarks, they show up in the right order");
-Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://gre/modules/Task.jsm");
+Cu.import("resource://gre/modules/PlacesUtils.jsm", this);
 Cu.import("resource://services-sync/engines/bookmarks.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
-var check = Task.async(function* (expected, message) {
-  let root = yield PlacesUtils.promiseBookmarksTree();
+function getBookmarks(folderId) {
+  let bookmarks = [];
+
+  let pos = 0;
+  while (true) {
+    let itemId = PlacesUtils.bookmarks.getIdForItemAt(folderId, pos);
+    _("Got itemId", itemId, "under", folderId, "at", pos);
+    if (itemId == -1)
+      break;
+
+    switch (PlacesUtils.bookmarks.getItemType(itemId)) {
+      case PlacesUtils.bookmarks.TYPE_BOOKMARK:
+        bookmarks.push(PlacesUtils.bookmarks.getItemTitle(itemId));
+        break;
+      case PlacesUtils.bookmarks.TYPE_FOLDER:
+        bookmarks.push(getBookmarks(itemId));
+        break;
+      default:
+        _("Unsupported item type..");
+    }
+
+    pos++;
+  }
+
+  return bookmarks;
+}
 
-  let bookmarks = (function mapTree(children) {
-    return children.map(child => {
-      let result = {
-        guid: child.guid,
-        index: child.index,
-      };
-      if (child.children) {
-        result.children = mapTree(child.children);
-      }
-      if (child.annos) {
-        let orphanAnno = child.annos.find(
-          anno => anno.name == "sync/parent");
-        if (orphanAnno) {
-          result.requestedParent = orphanAnno.value;
-        }
-      }
-      return result;
-    });
-  }(root.children));
+function check(expected) {
+  let bookmarks = getBookmarks(PlacesUtils.bookmarks.unfiledBookmarksFolder);
 
   _("Checking if the bookmark structure is", JSON.stringify(expected));
   _("Got bookmarks:", JSON.stringify(bookmarks));
-  deepEqual(bookmarks, expected);
-});
+  do_check_true(Utils.deepEquals(bookmarks, expected));
+}
 
-add_task(function* test_bookmark_order() {
+function run_test() {
   let store = new BookmarksEngine(Service)._store;
   initTestLogging("Trace");
 
   _("Starting with a clean slate of no bookmarks");
   store.wipe();
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    // Index 2 is the tags root. (Root indices depend on the order of the
-    // `CreateRoot` calls in `Database::CreateBookmarkRoots`).
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "clean slate");
+  check([]);
 
   function bookmark(name, parent) {
     let bookmark = new Bookmark("http://weave.server/my-bookmark");
@@ -83,447 +75,64 @@ add_task(function* test_bookmark_order() {
     store._orderChildren();
     delete store._childrenToOrder;
   }
-  let id10 = "10_aaaaaaaaa";
+
   _("basic add first bookmark");
-  apply(bookmark(id10, ""));
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "basic add first bookmark");
-  let id20 = "20_aaaaaaaaa";
+  apply(bookmark("10", ""));
+  check(["10"]);
+
   _("basic append behind 10");
-  apply(bookmark(id20, ""));
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "basic append behind 10");
+  apply(bookmark("20", ""));
+  check(["10", "20"]);
 
-  let id31 = "31_aaaaaaaaa";
-  let id30 = "f30_aaaaaaaa";
   _("basic create in folder");
-  apply(bookmark(id31, id30));
-  let f30 = folder(id30, "", [id31]);
+  apply(bookmark("31", "f30"));
+  let f30 = folder("f30", "", ["31"]);
   apply(f30);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "basic create in folder");
+  check(["10", "20", ["31"]]);
 
-  let id41 = "41_aaaaaaaaa";
-  let id40 = "f40_aaaaaaaa";
   _("insert missing parent -> append to unfiled");
-  apply(bookmark(id41, id40));
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id41,
-      index: 3,
-      requestedParent: id40,
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "insert missing parent -> append to unfiled");
-
-  let id42 = "42_aaaaaaaaa";
+  apply(bookmark("41", "f40"));
+  check(["10", "20", ["31"], "41"]);
 
   _("insert another missing parent -> append");
-  apply(bookmark(id42, id40));
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id41,
-      index: 3,
-      requestedParent: id40,
-    }, {
-      guid: id42,
-      index: 4,
-      requestedParent: id40,
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "insert another missing parent -> append");
+  apply(bookmark("42", "f40"));
+  check(["10", "20", ["31"], "41", "42"]);
 
   _("insert folder -> move children and followers");
-  let f40 = folder(id40, "", [id41, id42]);
+  let f40 = folder("f40", "", ["41", "42"]);
   apply(f40);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id40,
-      index: 3,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "insert folder -> move children and followers");
+  check(["10", "20", ["31"], ["41", "42"]]);
 
   _("Moving 41 behind 42 -> update f40");
-  f40.children = [id42, id41];
+  f40.children = ["42", "41"];
   apply(f40);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id40,
-      index: 3,
-      children: [{
-        guid: id42,
-        index: 0,
-      }, {
-        guid: id41,
-        index: 1,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Moving 41 behind 42 -> update f40");
+  check(["10", "20", ["31"], ["42", "41"]]);
 
   _("Moving 10 back to front -> update 10, 20");
-  f40.children = [id41, id42];
+  f40.children = ["41", "42"];
   apply(f40);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id20,
-      index: 1,
-    }, {
-      guid: id30,
-      index: 2,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id40,
-      index: 3,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Moving 10 back to front -> update 10, 20");
+  check(["10", "20", ["31"], ["41", "42"]]);
 
   _("Moving 20 behind 42 in f40 -> update 50");
-  apply(bookmark(id20, id40));
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id10,
-      index: 0,
-    }, {
-      guid: id30,
-      index: 1,
-      children: [{
-        guid: id31,
-        index: 0,
-      }],
-    }, {
-      guid: id40,
-      index: 2,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }, {
-        guid: id20,
-        index: 2,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Moving 20 behind 42 in f40 -> update 50");
+  apply(bookmark("20", "f40"));
+  check(["10", ["31"], ["41", "42", "20"]]);
 
   _("Moving 10 in front of 31 in f30 -> update 10, f30");
-  apply(bookmark(id10, id30));
-  f30.children = [id10, id31];
+  apply(bookmark("10", "f30"));
+  f30.children = ["10", "31"];
   apply(f30);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id30,
-      index: 0,
-      children: [{
-        guid: id10,
-        index: 0,
-      }, {
-        guid: id31,
-        index: 1,
-      }],
-    }, {
-      guid: id40,
-      index: 1,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }, {
-        guid: id20,
-        index: 2,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Moving 10 in front of 31 in f30 -> update 10, f30");
+  check([["10", "31"], ["41", "42", "20"]]);
 
   _("Moving 20 from f40 to f30 -> update 20, f30");
-  apply(bookmark(id20, id30));
-  f30.children = [id10, id20, id31];
+  apply(bookmark("20", "f30"));
+  f30.children = ["10", "20", "31"];
   apply(f30);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id30,
-      index: 0,
-      children: [{
-        guid: id10,
-        index: 0,
-      }, {
-        guid: id20,
-        index: 1,
-      }, {
-        guid: id31,
-        index: 2,
-      }],
-    }, {
-      guid: id40,
-      index: 1,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }]
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Moving 20 from f40 to f30 -> update 20, f30");
+  check([["10", "20", "31"], ["41", "42"]]);
 
   _("Move 20 back to front -> update 20, f30");
-  apply(bookmark(id20, ""));
-  f30.children = [id10, id31];
+  apply(bookmark("20", ""));
+  f30.children = ["10", "31"];
   apply(f30);
-  yield check([{
-    guid: PlacesUtils.bookmarks.menuGuid,
-    index: 0,
-  }, {
-    guid: PlacesUtils.bookmarks.toolbarGuid,
-    index: 1,
-  }, {
-    guid: PlacesUtils.bookmarks.unfiledGuid,
-    index: 3,
-    children: [{
-      guid: id30,
-      index: 0,
-      children: [{
-        guid: id10,
-        index: 0,
-      }, {
-        guid: id31,
-        index: 1,
-      }],
-    }, {
-      guid: id40,
-      index: 1,
-      children: [{
-        guid: id41,
-        index: 0,
-      }, {
-        guid: id42,
-        index: 1,
-      }],
-    }, {
-      guid: id20,
-      index: 2,
-    }],
-  }, {
-    guid: PlacesUtils.bookmarks.mobileGuid,
-    index: 4,
-  }], "Move 20 back to front -> update 20, f30");
+  check([["10", "31"], ["41", "42"], "20"]);
 
-});
+}
diff --git a/services/sync/tests/unit/test_bookmark_places_query_rewriting.js b/services/sync/tests/unit/test_bookmark_places_query_rewriting.js
index 0ddf81583..8b764d675 100644
--- a/services/sync/tests/unit/test_bookmark_places_query_rewriting.js
+++ b/services/sync/tests/unit/test_bookmark_places_query_rewriting.js
@@ -7,54 +7,45 @@ Cu.import("resource://services-sync/engines/bookmarks.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
-var engine = new BookmarksEngine(Service);
-var store = engine._store;
-
-function makeTagRecord(id, uri) {
-  let tagRecord = new BookmarkQuery("bookmarks", id);
-  tagRecord.queryId = "MagicTags";
-  tagRecord.parentName = "Bookmarks Toolbar";
-  tagRecord.bmkUri = uri;
-  tagRecord.title = "tagtag";
-  tagRecord.folderName = "bar";
-  tagRecord.parentid = PlacesUtils.bookmarks.toolbarGuid;
-  return tagRecord;
-}
+let engine = new BookmarksEngine(Service);
+let store = engine._store;
 
 function run_test() {
   initTestLogging("Trace");
   Log.repository.getLogger("Sync.Engine.Bookmarks").level = Log.Level.Trace;
   Log.repository.getLogger("Sync.Store.Bookmarks").level = Log.Level.Trace;
 
+  let tagRecord = new BookmarkQuery("bookmarks", "abcdefabcdef");
   let uri = "place:folder=499&type=7&queryType=1";
-  let tagRecord = makeTagRecord("abcdefabcdef", uri);
+  tagRecord.queryId = "MagicTags";
+  tagRecord.parentName = "Bookmarks Toolbar";
+  tagRecord.bmkUri = uri;
+  tagRecord.title = "tagtag";
+  tagRecord.folderName = "bar";
 
   _("Type: " + tagRecord.type);
   _("Folder name: " + tagRecord.folderName);
-  store.applyIncoming(tagRecord);
+  store.preprocessTagQuery(tagRecord);
+
+  _("Verify that the URI has been rewritten.");
+  do_check_neq(tagRecord.bmkUri, uri);
 
-  let tags = PlacesUtils.getFolderContents(PlacesUtils.tagsFolderId).root;
+  let tags = store._getNode(PlacesUtils.tagsFolderId);
+  tags.containerOpen = true;
   let tagID;
-  try {
-    for (let i = 0; i < tags.childCount; ++i) {
-      let child = tags.getChild(i);
-      if (child.title == "bar") {
-        tagID = child.itemId;
-      }
-    }
-  } finally {
-    tags.containerOpen = false;
+  for (let i = 0; i < tags.childCount; ++i) {
+    let child = tags.getChild(i);
+    if (child.title == "bar")
+      tagID = child.itemId;
   }
+  tags.containerOpen = false;
 
   _("Tag ID: " + tagID);
-  let insertedRecord = store.createRecord("abcdefabcdef", "bookmarks");
-  do_check_eq(insertedRecord.bmkUri, uri.replace("499", tagID));
+  do_check_eq(tagRecord.bmkUri, uri.replace("499", tagID));
 
   _("... but not if the type is wrong.");
   let wrongTypeURI = "place:folder=499&type=2&queryType=1";
-  let wrongTypeRecord = makeTagRecord("fedcbafedcba", wrongTypeURI);
-  store.applyIncoming(wrongTypeRecord);
-
-  insertedRecord = store.createRecord("fedcbafedcba", "bookmarks");
-  do_check_eq(insertedRecord.bmkUri, wrongTypeURI);
+  tagRecord.bmkUri = wrongTypeURI;
+  store.preprocessTagQuery(tagRecord);
+  do_check_eq(tagRecord.bmkUri, wrongTypeURI);
 }
diff --git a/services/sync/tests/unit/test_bookmark_smart_bookmarks.js b/services/sync/tests/unit/test_bookmark_smart_bookmarks.js
index 942cf2761..4e9b2834d 100644
--- a/services/sync/tests/unit/test_bookmark_smart_bookmarks.js
+++ b/services/sync/tests/unit/test_bookmark_smart_bookmarks.js
@@ -16,8 +16,8 @@ var IOService = Cc["@mozilla.org/network/io-service;1"]
 
 
 Service.engineManager.register(BookmarksEngine);
-var engine = Service.engineManager.get("bookmarks");
-var store = engine._store;
+let engine = Service.engineManager.get("bookmarks");
+let store = engine._store;
 
 // Clean up after other tests. Only necessary in XULRunner.
 store.wipe();
@@ -57,7 +57,7 @@ function serverForFoo(engine) {
 
 // Verify that Places smart bookmarks have their annotation uploaded and
 // handled locally.
-add_task(function *test_annotation_uploaded() {
+add_test(function test_annotation_uploaded() {
   let server = serverForFoo(engine);
   new SyncTestingInfrastructure(server.server);
 
@@ -110,9 +110,9 @@ add_task(function *test_annotation_uploaded() {
   let collection = server.user("foo").collection("bookmarks");
 
   try {
-    yield sync_engine_and_validate_telem(engine, false);
+    engine.sync();
     let wbos = collection.keys(function (id) {
-                 return ["menu", "toolbar", "mobile", "unfiled"].indexOf(id) == -1;
+                 return ["menu", "toolbar", "mobile"].indexOf(id) == -1;
                });
     do_check_eq(wbos.length, 1);
 
@@ -141,7 +141,7 @@ add_task(function *test_annotation_uploaded() {
     do_check_eq(smartBookmarkCount(), startCount);
 
     _("Sync. Verify that the downloaded record carries the annotation.");
-    yield sync_engine_and_validate_telem(engine, false);
+    engine.sync();
 
     _("Verify that the Places DB now has an annotated bookmark.");
     _("Our count has increased again.");
diff --git a/services/sync/tests/unit/test_bookmark_store.js b/services/sync/tests/unit/test_bookmark_store.js
index 902206ba6..53ea433e6 100644
--- a/services/sync/tests/unit/test_bookmark_store.js
+++ b/services/sync/tests/unit/test_bookmark_store.js
@@ -11,17 +11,17 @@ const PARENT_ANNO = "sync/parent";
 
 Service.engineManager.register(BookmarksEngine);
 
-var engine = Service.engineManager.get("bookmarks");
-var store = engine._store;
-var tracker = engine._tracker;
+let engine = Service.engineManager.get("bookmarks");
+let store = engine._store;
+let tracker = engine._tracker;
 
 // Don't write some persistence files asynchronously.
 tracker.persistChangedIDs = false;
 
-var fxuri = Utils.makeURI("http://getfirefox.com/");
-var tburi = Utils.makeURI("http://getthunderbird.com/");
+let fxuri = Utils.makeURI("http://getfirefox.com/");
+let tburi = Utils.makeURI("http://getthunderbird.com/");
 
-add_task(function* test_ignore_specials() {
+add_test(function test_ignore_specials() {
   _("Ensure that we can't delete bookmark roots.");
 
   // Belt...
@@ -30,7 +30,6 @@ add_task(function* test_ignore_specials() {
   do_check_neq(null, store.idForGUID("toolbar"));
 
   store.applyIncoming(record);
-  yield store.deletePending();
 
   // Ensure that the toolbar exists.
   do_check_neq(null, store.idForGUID("toolbar"));
@@ -40,11 +39,11 @@ add_task(function* test_ignore_specials() {
 
   // Braces...
   store.remove(record);
-  yield store.deletePending();
   do_check_neq(null, store.idForGUID("toolbar"));
   engine._buildGUIDMap();
 
   store.wipe();
+  run_next_test();
 });
 
 add_test(function test_bookmark_create() {
@@ -81,8 +80,8 @@ add_test(function test_bookmark_create() {
     _("Have the store create a new record object. Verify that it has the same data.");
     let newrecord = store.createRecord(fxrecord.id);
     do_check_true(newrecord instanceof Bookmark);
-    for (let property of ["type", "bmkUri", "description", "title",
-                          "keyword", "parentName", "parentid"]) {
+    for each (let property in ["type", "bmkUri", "description", "title",
+                               "keyword", "parentName", "parentid"]) {
       do_check_eq(newrecord[property], fxrecord[property]);
     }
     do_check_true(Utils.deepEquals(newrecord.tags.sort(),
@@ -167,7 +166,7 @@ add_test(function test_bookmark_createRecord() {
 
     _("Verify that the record is created accordingly.");
     let record = store.createRecord(bmk1_guid);
-    do_check_eq(record.title, "");
+    do_check_eq(record.title, null);
     do_check_eq(record.description, null);
     do_check_eq(record.keyword, null);
 
@@ -198,7 +197,7 @@ add_test(function test_folder_create() {
     _("Have the store create a new record object. Verify that it has the same data.");
     let newrecord = store.createRecord(folder.id);
     do_check_true(newrecord instanceof BookmarkFolder);
-    for (let property of ["title", "parentName", "parentid"])
+    for each (let property in ["title", "parentName", "parentid"])
       do_check_eq(newrecord[property], folder[property]);
 
     _("Folders have high sort index to ensure they're synced first.");
@@ -244,7 +243,7 @@ add_test(function test_folder_createRecord() {
   }
 });
 
-add_task(function* test_deleted() {
+add_test(function test_deleted() {
   try {
     _("Create a bookmark that will be deleted.");
     let bmk1_id = PlacesUtils.bookmarks.insertBookmark(
@@ -256,7 +255,7 @@ add_task(function* test_deleted() {
     let record = new PlacesItem("bookmarks", bmk1_guid);
     record.deleted = true;
     store.applyIncoming(record);
-    yield store.deletePending();
+
     _("Ensure it has been deleted.");
     let error;
     try {
@@ -272,6 +271,7 @@ add_task(function* test_deleted() {
   } finally {
     _("Clean up.");
     store.wipe();
+    run_next_test();
   }
 });
 
@@ -428,106 +428,6 @@ add_test(function test_empty_query_doesnt_die() {
   run_next_test();
 });
 
-function assertDeleted(id) {
-  let error;
-  try {
-    PlacesUtils.bookmarks.getItemType(id);
-  } catch (e) {
-    error = e;
-  }
-  equal(error.result, Cr.NS_ERROR_ILLEGAL_VALUE)
-}
-
-add_task(function* test_delete_buffering() {
-  store.wipe();
-  try {
-    _("Create a folder with two bookmarks.");
-    let folder = new BookmarkFolder("bookmarks", "testfolder-1");
-    folder.parentName = "Bookmarks Toolbar";
-    folder.parentid = "toolbar";
-    folder.title = "Test Folder";
-    store.applyIncoming(folder);
-
-
-    let fxRecord = new Bookmark("bookmarks", "get-firefox1");
-    fxRecord.bmkUri        = fxuri.spec;
-    fxRecord.title         = "Get Firefox!";
-    fxRecord.parentName    = "Test Folder";
-    fxRecord.parentid      = "testfolder-1";
-
-    let tbRecord = new Bookmark("bookmarks", "get-tndrbrd1");
-    tbRecord.bmkUri        = tburi.spec;
-    tbRecord.title         = "Get Thunderbird!";
-    tbRecord.parentName    = "Test Folder";
-    tbRecord.parentid      = "testfolder-1";
-
-    store.applyIncoming(fxRecord);
-    store.applyIncoming(tbRecord);
-
-    let folderId = store.idForGUID(folder.id);
-    let fxRecordId = store.idForGUID(fxRecord.id);
-    let tbRecordId = store.idForGUID(tbRecord.id);
-
-    _("Check everything was created correctly.");
-
-    equal(PlacesUtils.bookmarks.getItemType(fxRecordId),
-          PlacesUtils.bookmarks.TYPE_BOOKMARK);
-    equal(PlacesUtils.bookmarks.getItemType(tbRecordId),
-          PlacesUtils.bookmarks.TYPE_BOOKMARK);
-    equal(PlacesUtils.bookmarks.getItemType(folderId),
-          PlacesUtils.bookmarks.TYPE_FOLDER);
-
-    equal(PlacesUtils.bookmarks.getFolderIdForItem(fxRecordId), folderId);
-    equal(PlacesUtils.bookmarks.getFolderIdForItem(tbRecordId), folderId);
-    equal(PlacesUtils.bookmarks.getFolderIdForItem(folderId),
-          PlacesUtils.bookmarks.toolbarFolder);
-
-    _("Delete the folder and one bookmark.");
-
-    let deleteFolder = new PlacesItem("bookmarks", "testfolder-1");
-    deleteFolder.deleted = true;
-
-    let deleteFxRecord = new PlacesItem("bookmarks", "get-firefox1");
-    deleteFxRecord.deleted = true;
-
-    store.applyIncoming(deleteFolder);
-    store.applyIncoming(deleteFxRecord);
-
-    _("Check that we haven't deleted them yet, but that the deletions are queued");
-    // these will throw if we've deleted them
-    equal(PlacesUtils.bookmarks.getItemType(fxRecordId),
-           PlacesUtils.bookmarks.TYPE_BOOKMARK);
-
-    equal(PlacesUtils.bookmarks.getItemType(folderId),
-           PlacesUtils.bookmarks.TYPE_FOLDER);
-
-    equal(PlacesUtils.bookmarks.getFolderIdForItem(fxRecordId), folderId);
-
-    ok(store._foldersToDelete.has(folder.id));
-    ok(store._atomsToDelete.has(fxRecord.id));
-    ok(!store._atomsToDelete.has(tbRecord.id));
-
-    _("Process pending deletions and ensure that the right things are deleted.");
-    let updatedGuids = yield store.deletePending();
-
-    deepEqual(updatedGuids.sort(), ["get-tndrbrd1", "toolbar"]);
-
-    assertDeleted(fxRecordId);
-    assertDeleted(folderId);
-
-    ok(!store._foldersToDelete.has(folder.id));
-    ok(!store._atomsToDelete.has(fxRecord.id));
-
-    equal(PlacesUtils.bookmarks.getFolderIdForItem(tbRecordId),
-          PlacesUtils.bookmarks.toolbarFolder);
-
-  } finally {
-    _("Clean up.");
-    store.wipe();
-  }
-});
-
-
 function run_test() {
   initTestLogging('Trace');
   run_next_test();
diff --git a/services/sync/tests/unit/test_bookmark_tracker.js b/services/sync/tests/unit/test_bookmark_tracker.js
index 9b9242579..6060fbae4 100644
--- a/services/sync/tests/unit/test_bookmark_tracker.js
+++ b/services/sync/tests/unit/test_bookmark_tracker.js
@@ -2,80 +2,24 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://gre/modules/PlacesSyncUtils.jsm");
-Cu.import("resource://gre/modules/Task.jsm");
 Cu.import("resource://services-sync/constants.js");
 Cu.import("resource://services-sync/engines/bookmarks.js");
 Cu.import("resource://services-sync/engines.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
-Cu.import("resource:///modules/PlacesUIUtils.jsm");
 
 Service.engineManager.register(BookmarksEngine);
-var engine = Service.engineManager.get("bookmarks");
-var store  = engine._store;
-var tracker = engine._tracker;
+let engine = Service.engineManager.get("bookmarks");
+let store  = engine._store;
+let tracker = engine._tracker;
 
 store.wipe();
 tracker.persistChangedIDs = false;
 
-const DAY_IN_MS = 24 * 60 * 60 * 1000;
-
-// Test helpers.
-function* verifyTrackerEmpty() {
-  let changes = engine.pullNewChanges();
-  equal(changes.count(), 0);
-  equal(tracker.score, 0);
-}
-
-function* resetTracker() {
-  tracker.clearChangedIDs();
-  tracker.resetScore();
-}
-
-function* cleanup() {
-  store.wipe();
-  yield resetTracker();
-  yield stopTracking();
-}
-
-// startTracking is a signal that the test wants to notice things that happen
-// after this is called (ie, things already tracked should be discarded.)
-function* startTracking() {
-  Svc.Obs.notify("weave:engine:start-tracking");
-}
-
-function* stopTracking() {
-  Svc.Obs.notify("weave:engine:stop-tracking");
-}
-
-function* verifyTrackedItems(tracked) {
-  let changes = engine.pullNewChanges();
-  let trackedIDs = new Set(changes.ids());
-  for (let guid of tracked) {
-    ok(changes.has(guid), `${guid} should be tracked`);
-    ok(changes.getModifiedTimestamp(guid) > 0,
-      `${guid} should have a modified time`);
-    trackedIDs.delete(guid);
-  }
-  equal(trackedIDs.size, 0, `Unhandled tracked IDs: ${
-    JSON.stringify(Array.from(trackedIDs))}`);
-}
-
-function* verifyTrackedCount(expected) {
-  let changes = engine.pullNewChanges();
-  equal(changes.count(), expected);
-}
-
-// Copied from PlacesSyncUtils.jsm.
-function findAnnoItems(anno, val) {
-  let annos = PlacesUtils.annotations;
-  return annos.getItemsWithAnnotation(anno, {}).filter(id =>
-    annos.getItemAnnotation(id, anno) == val);
-}
-
-add_task(function* test_tracking() {
-  _("Test starting and stopping the tracker");
+function test_tracking() {
+  _("Verify we've got an empty tracker to work with.");
+  let tracker = engine._tracker;
+  do_check_empty(tracker.changedIDs);
 
   let folder = PlacesUtils.bookmarks.createFolder(
     PlacesUtils.bookmarks.bookmarksMenuFolder,
@@ -89,630 +33,60 @@ add_task(function* test_tracking() {
   try {
     _("Create bookmark. Won't show because we haven't started tracking yet");
     createBmk();
-    yield verifyTrackedCount(0);
+    do_check_empty(tracker.changedIDs);
     do_check_eq(tracker.score, 0);
 
     _("Tell the tracker to start tracking changes.");
-    yield startTracking();
+    Svc.Obs.notify("weave:engine:start-tracking");
     createBmk();
     // We expect two changed items because the containing folder
     // changed as well (new child).
-    yield verifyTrackedCount(2);
+    do_check_attribute_count(tracker.changedIDs, 2);
     do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
 
     _("Notifying twice won't do any harm.");
-    yield startTracking();
+    Svc.Obs.notify("weave:engine:start-tracking");
     createBmk();
-    yield verifyTrackedCount(3);
+    do_check_attribute_count(tracker.changedIDs, 3);
     do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 4);
 
     _("Let's stop tracking again.");
-    yield resetTracker();
-    yield stopTracking();
+    tracker.clearChangedIDs();
+    tracker.resetScore();
+    Svc.Obs.notify("weave:engine:stop-tracking");
     createBmk();
-    yield verifyTrackedCount(0);
+    do_check_empty(tracker.changedIDs);
     do_check_eq(tracker.score, 0);
 
     _("Notifying twice won't do any harm.");
-    yield stopTracking();
+    Svc.Obs.notify("weave:engine:stop-tracking");
     createBmk();
-    yield verifyTrackedCount(0);
+    do_check_empty(tracker.changedIDs);
     do_check_eq(tracker.score, 0);
 
   } finally {
     _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_batch_tracking() {
-  _("Test tracker does the correct thing during and after a places 'batch'");
-
-  yield startTracking();
-
-  PlacesUtils.bookmarks.runInBatchMode({
-    runBatched: function() {
-      let folder = PlacesUtils.bookmarks.createFolder(
-        PlacesUtils.bookmarks.bookmarksMenuFolder,
-        "Test Folder", PlacesUtils.bookmarks.DEFAULT_INDEX);
-      // We should be tracking the new folder and its parent (and need to jump
-      // through blocking hoops...)
-      Async.promiseSpinningly(Task.spawn(verifyTrackedCount(2)));
-      // But not have bumped the score.
-      do_check_eq(tracker.score, 0);
-    }
-  }, null);
-
-  // Out of batch mode - tracker should be the same, but score should be up.
-  yield verifyTrackedCount(2);
-  do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  yield cleanup();
-});
-
-add_task(function* test_nested_batch_tracking() {
-  _("Test tracker does the correct thing if a places 'batch' is nested");
-
-  yield startTracking();
-
-  PlacesUtils.bookmarks.runInBatchMode({
-    runBatched: function() {
-
-      PlacesUtils.bookmarks.runInBatchMode({
-        runBatched: function() {
-          let folder = PlacesUtils.bookmarks.createFolder(
-            PlacesUtils.bookmarks.bookmarksMenuFolder,
-            "Test Folder", PlacesUtils.bookmarks.DEFAULT_INDEX);
-          // We should be tracking the new folder and its parent (and need to jump
-          // through blocking hoops...)
-          Async.promiseSpinningly(Task.spawn(verifyTrackedCount(2)));
-          // But not have bumped the score.
-          do_check_eq(tracker.score, 0);
-        }
-      }, null);
-      _("inner batch complete.");
-      // should still not have a score as the outer batch is pending.
-      do_check_eq(tracker.score, 0);
-    }
-  }, null);
-
-  // Out of both batches - tracker should be the same, but score should be up.
-  yield verifyTrackedCount(2);
-  do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  yield cleanup();
-});
-
-add_task(function* test_tracker_sql_batching() {
-  _("Test tracker does the correct thing when it is forced to batch SQL queries");
-
-  const SQLITE_MAX_VARIABLE_NUMBER = 999;
-  let numItems = SQLITE_MAX_VARIABLE_NUMBER * 2 + 10;
-  let createdIDs = [];
-
-  yield startTracking();
-
-  PlacesUtils.bookmarks.runInBatchMode({
-    runBatched: function() {
-      for (let i = 0; i < numItems; i++) {
-        let syncBmkID = PlacesUtils.bookmarks.insertBookmark(
-                          PlacesUtils.bookmarks.unfiledBookmarksFolder,
-                          Utils.makeURI("https://example.org/" + i),
-                          PlacesUtils.bookmarks.DEFAULT_INDEX,
-                          "Sync Bookmark " + i);
-        createdIDs.push(syncBmkID);
-      }
-    }
-  }, null);
-
-  do_check_eq(createdIDs.length, numItems);
-  yield verifyTrackedCount(numItems + 1); // the folder is also tracked.
-  yield cleanup();
-});
-
-add_task(function* test_onItemAdded() {
-  _("Items inserted via the synchronous bookmarks API should be tracked");
-
-  try {
-    yield startTracking();
-
-    _("Insert a folder using the sync API");
-    let syncFolderID = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder, "Sync Folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let syncFolderGUID = engine._store.GUIDForId(syncFolderID);
-    yield verifyTrackedItems(["menu", syncFolderGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-
-    yield resetTracker();
-    yield startTracking();
-
-    _("Insert a bookmark using the sync API");
-    let syncBmkID = PlacesUtils.bookmarks.insertBookmark(syncFolderID,
-      Utils.makeURI("https://example.org/sync"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Sync Bookmark");
-    let syncBmkGUID = engine._store.GUIDForId(syncBmkID);
-    yield verifyTrackedItems([syncFolderGUID, syncBmkGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-
-    yield resetTracker();
-    yield startTracking();
-
-    _("Insert a separator using the sync API");
-    let syncSepID = PlacesUtils.bookmarks.insertSeparator(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      PlacesUtils.bookmarks.getItemIndex(syncFolderID));
-    let syncSepGUID = engine._store.GUIDForId(syncSepID);
-    yield verifyTrackedItems(["menu", syncSepGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemAdded() {
-  _("Items inserted via the asynchronous bookmarks API should be tracked");
-
-  try {
-    yield startTracking();
-
-    _("Insert a folder using the async API");
-    let asyncFolder = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      title: "Async Folder",
-    });
-    yield verifyTrackedItems(["menu", asyncFolder.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-
-    yield resetTracker();
-    yield startTracking();
-
-    _("Insert a bookmark using the async API");
-    let asyncBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: asyncFolder.guid,
-      url: "https://example.org/async",
-      title: "Async Bookmark",
-    });
-    yield verifyTrackedItems([asyncFolder.guid, asyncBmk.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-
-    yield resetTracker();
-    yield startTracking();
-
-    _("Insert a separator using the async API");
-    let asyncSep = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_SEPARATOR,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      index: asyncFolder.index,
-    });
-    yield verifyTrackedItems(["menu", asyncSep.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemChanged() {
-  _("Items updated using the asynchronous bookmarks API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark");
-    let fxBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    _(`Firefox GUID: ${fxBmk.guid}`);
-
-    yield startTracking();
-
-    _("Update the bookmark using the async API");
-    yield PlacesUtils.bookmarks.update({
-      guid: fxBmk.guid,
-      title: "Download Firefox",
-      url: "https://www.mozilla.org/firefox",
-      // PlacesUtils.bookmarks.update rejects last modified dates older than
-      // the added date.
-      lastModified: new Date(Date.now() + DAY_IN_MS),
-    });
-
-    yield verifyTrackedItems([fxBmk.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemChanged_itemDates() {
-  _("Changes to item dates should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark");
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-
-    yield startTracking();
-
-    _("Reset the bookmark's added date");
-    // Convert to microseconds for PRTime.
-    let dateAdded = (Date.now() - DAY_IN_MS) * 1000;
-    PlacesUtils.bookmarks.setItemDateAdded(fx_id, dateAdded);
-    yield verifyTrackedItems([fx_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-    yield resetTracker();
-
-    _("Set the bookmark's last modified date");
-    let dateModified = Date.now() * 1000;
-    PlacesUtils.bookmarks.setItemLastModified(fx_id, dateModified);
-    yield verifyTrackedItems([fx_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemChanged_changeBookmarkURI() {
-  _("Changes to bookmark URIs should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark");
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-
-    _("Set a tracked annotation to make sure we only notify once");
-    PlacesUtils.annotations.setItemAnnotation(
-      fx_id, PlacesSyncUtils.bookmarks.DESCRIPTION_ANNO, "A test description", 0,
-      PlacesUtils.annotations.EXPIRE_NEVER);
-
-    yield startTracking();
-
-    _("Change the bookmark's URI");
-    PlacesUtils.bookmarks.changeBookmarkURI(fx_id,
-      Utils.makeURI("https://www.mozilla.org/firefox"));
-    yield verifyTrackedItems([fx_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemTagged() {
-  _("Items tagged using the synchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Create a folder");
-    let folder = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder, "Parent",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folderGUID = engine._store.GUIDForId(folder);
-    _("Folder ID: " + folder);
-    _("Folder GUID: " + folderGUID);
-
-    _("Track changes to tags");
-    let uri = Utils.makeURI("http://getfirefox.com");
-    let b = PlacesUtils.bookmarks.insertBookmark(
-      folder, uri,
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-    let bGUID = engine._store.GUIDForId(b);
-    _("New item is " + b);
-    _("GUID: " + bGUID);
-
-    yield startTracking();
-
-    _("Tag the item");
-    PlacesUtils.tagging.tagURI(uri, ["foo"]);
-
-    // bookmark should be tracked, folder should not be.
-    yield verifyTrackedItems([bGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 5);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemUntagged() {
-  _("Items untagged using the synchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert tagged bookmarks");
-    let uri = Utils.makeURI("http://getfirefox.com");
-    let fx1ID = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder, uri,
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-    let fx1GUID = engine._store.GUIDForId(fx1ID);
-    // Different parent and title; same URL.
-    let fx2ID = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.toolbarFolder, uri,
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Download Firefox");
-    let fx2GUID = engine._store.GUIDForId(fx2ID);
-    PlacesUtils.tagging.tagURI(uri, ["foo"]);
-
-    yield startTracking();
-
-    _("Remove the tag");
-    PlacesUtils.tagging.untagURI(uri, ["foo"]);
-
-    yield verifyTrackedItems([fx1GUID, fx2GUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemUntagged() {
-  _("Items untagged using the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert tagged bookmarks");
-    let fxBmk1 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let fxBmk2 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
-      url: "http://getfirefox.com",
-      title: "Download Firefox",
-    });
-    let tag = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.tagsGuid,
-      title: "some tag",
-    });
-    let fxTag = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: tag.guid,
-      url: "http://getfirefox.com",
-    });
-
-    yield startTracking();
-
-    _("Remove the tag using the async bookmarks API");
-    yield PlacesUtils.bookmarks.remove(fxTag.guid);
-
-    yield verifyTrackedItems([fxBmk1.guid, fxBmk2.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemTagged() {
-  _("Items tagged using the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert untagged bookmarks");
-    let folder1 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      title: "Folder 1",
-    });
-    let fxBmk1 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: folder1.guid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let folder2 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      title: "Folder 2",
-    });
-    // Different parent and title; same URL.
-    let fxBmk2 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: folder2.guid,
-      url: "http://getfirefox.com",
-      title: "Download Firefox",
-    });
-
-    yield startTracking();
-
-    // This will change once tags are moved into a separate table (bug 424160).
-    // We specifically test this case because Bookmarks.jsm updates tagged
-    // bookmarks and notifies observers.
-    _("Insert a tag using the async bookmarks API");
-    let tag = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.tagsGuid,
-      title: "some tag",
-    });
-
-    _("Tag an item using the async bookmarks API");
-    yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: tag.guid,
-      url: "http://getfirefox.com",
-    });
-
-    yield verifyTrackedItems([fxBmk1.guid, fxBmk2.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 6);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemKeywordChanged() {
-  _("Keyword changes via the synchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-    let folder = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder, "Parent",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folderGUID = engine._store.GUIDForId(folder);
-    _("Track changes to keywords");
-    let uri = Utils.makeURI("http://getfirefox.com");
-    let b = PlacesUtils.bookmarks.insertBookmark(
-      folder, uri,
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-    let bGUID = engine._store.GUIDForId(b);
-    _("New item is " + b);
-    _("GUID: " + bGUID);
-
-    yield startTracking();
-
-    _("Give the item a keyword");
-    PlacesUtils.bookmarks.setKeywordForBookmark(b, "the_keyword");
-
-    // bookmark should be tracked, folder should not be.
-    yield verifyTrackedItems([bGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-
-  } finally {
-    _("Clean up.");
-    yield cleanup();
+    store.wipe();
+    tracker.clearChangedIDs();
+    tracker.resetScore();
+    Svc.Obs.notify("weave:engine:stop-tracking");
   }
-});
-
-add_task(function* test_async_onItemKeywordChanged() {
-  _("Keyword changes via the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert two bookmarks with the same URL");
-    let fxBmk1 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let fxBmk2 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
-      url: "http://getfirefox.com",
-      title: "Download Firefox",
-    });
-
-    yield startTracking();
-
-    _("Add a keyword for both items");
-    yield PlacesUtils.keywords.insert({
-      keyword: "the_keyword",
-      url: "http://getfirefox.com",
-      postData: "postData",
-    });
-
-    yield verifyTrackedItems([fxBmk1.guid, fxBmk2.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemKeywordDeleted() {
-  _("Keyword deletions via the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert two bookmarks with the same URL and keywords");
-    let fxBmk1 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let fxBmk2 = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
-      url: "http://getfirefox.com",
-      title: "Download Firefox",
-    });
-    yield PlacesUtils.keywords.insert({
-      keyword: "the_keyword",
-      url: "http://getfirefox.com",
-    });
-
-    yield startTracking();
-
-    _("Remove the keyword");
-    yield PlacesUtils.keywords.remove("the_keyword");
-
-    yield verifyTrackedItems([fxBmk1.guid, fxBmk2.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemPostDataChanged() {
-  _("Post data changes should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark");
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-
-    yield startTracking();
+}
 
-    // PlacesUtils.setPostDataForBookmark is deprecated, but still used by
-    // PlacesTransactions.NewBookmark.
-    _("Post data for the bookmark should be ignored");
-    yield PlacesUtils.setPostDataForBookmark(fx_id, "postData");
-    yield verifyTrackerEmpty();
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
+function test_onItemChanged() {
+  // Anno that's in ANNOS_TO_TRACK.
+  const DESCRIPTION_ANNO = "bookmarkProperties/description";
 
-add_task(function* test_onItemAnnoChanged() {
-  _("Item annotations should be tracked");
+  _("Verify we've got an empty tracker to work with.");
+  let tracker = engine._tracker;
+  do_check_empty(tracker.changedIDs);
+  do_check_eq(tracker.score, 0);
 
   try {
-    yield stopTracking();
+    Svc.Obs.notify("weave:engine:stop-tracking");
     let folder = PlacesUtils.bookmarks.createFolder(
       PlacesUtils.bookmarks.bookmarksMenuFolder, "Parent",
       PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folderGUID = engine._store.GUIDForId(folder);
     _("Track changes to annos.");
     let b = PlacesUtils.bookmarks.insertBookmark(
       folder, Utils.makeURI("http://getfirefox.com"),
@@ -721,225 +95,27 @@ add_task(function* test_onItemAnnoChanged() {
     _("New item is " + b);
     _("GUID: " + bGUID);
 
-    yield startTracking();
+    Svc.Obs.notify("weave:engine:start-tracking");
     PlacesUtils.annotations.setItemAnnotation(
-      b, PlacesSyncUtils.bookmarks.DESCRIPTION_ANNO, "A test description", 0,
+      b, DESCRIPTION_ANNO, "A test description", 0,
       PlacesUtils.annotations.EXPIRE_NEVER);
-    // bookmark should be tracked, folder should not.
-    yield verifyTrackedItems([bGUID]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-    yield resetTracker();
-
-    PlacesUtils.annotations.removeItemAnnotation(b,
-      PlacesSyncUtils.bookmarks.DESCRIPTION_ANNO);
-    yield verifyTrackedItems([bGUID]);
+    do_check_true(tracker.changedIDs[bGUID] > 0);
     do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemAdded_filtered_root() {
-  _("Items outside the change roots should not be tracked");
-
-  try {
-    yield startTracking();
-
-    _("Create a new root");
-    let rootID = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.placesRoot,
-      "New root",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let rootGUID = engine._store.GUIDForId(rootID);
-    _(`New root GUID: ${rootGUID}`);
-
-    _("Insert a bookmark underneath the new root");
-    let untrackedBmkID = PlacesUtils.bookmarks.insertBookmark(
-      rootID,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let untrackedBmkGUID = engine._store.GUIDForId(untrackedBmkID);
-    _(`New untracked bookmark GUID: ${untrackedBmkGUID}`);
-
-    _("Insert a bookmark underneath the Places root");
-    let rootBmkID = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.placesRoot,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-    let rootBmkGUID = engine._store.GUIDForId(rootBmkID);
-    _(`New Places root bookmark GUID: ${rootBmkGUID}`);
-
-    _("New root and bookmark should be ignored");
-    yield verifyTrackedItems([]);
-    // ...But we'll still increment the score and filter out the changes at
-    // sync time.
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 6);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemDeleted_filtered_root() {
-  _("Deleted items outside the change roots should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark underneath the Places root");
-    let rootBmkID = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.placesRoot,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-    let rootBmkGUID = engine._store.GUIDForId(rootBmkID);
-    _(`New Places root bookmark GUID: ${rootBmkGUID}`);
-
-    yield startTracking();
-
-    PlacesUtils.bookmarks.removeItem(rootBmkID);
-
-    // We shouldn't upload tombstones for items in filtered roots, but the
-    // `onItemRemoved` observer doesn't have enough context to determine
-    // the root, so we'll end up uploading it.
-    yield verifyTrackedItems([rootBmkGUID]);
-    // We'll increment the counter twice (once for the removed item, and once
-    // for the Places root), then filter out the root.
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
 
-add_task(function* test_onPageAnnoChanged() {
-  _("Page annotations should not be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a bookmark without an annotation");
-    let pageURI = Utils.makeURI("http://getfirefox.com");
-    PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      pageURI,
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-
-    yield startTracking();
-
-    _("Add a page annotation");
-    PlacesUtils.annotations.setPageAnnotation(pageURI, "URIProperties/characterSet",
-      "UTF-8", 0, PlacesUtils.annotations.EXPIRE_NEVER);
-    yield verifyTrackerEmpty();
-    yield resetTracker();
-
-    _("Remove the page annotation");
-    PlacesUtils.annotations.removePageAnnotation(pageURI,
-      "URIProperties/characterSet");
-    yield verifyTrackerEmpty();
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onFaviconChanged() {
-  _("Favicon changes should not be tracked");
-
-  try {
-    yield stopTracking();
-
-    let pageURI = Utils.makeURI("http://getfirefox.com");
-    let iconURI = Utils.makeURI("http://getfirefox.com/icon");
-    PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      pageURI,
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-
-    yield PlacesTestUtils.addVisits(pageURI);
-
-    yield startTracking();
-
-    _("Favicon annotations should be ignored");
-    let iconURL = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAA" +
-      "AAAA6fptVAAAACklEQVQI12NgAAAAAgAB4iG8MwAAAABJRU5ErkJggg==";
-
-    PlacesUtils.favicons.replaceFaviconDataFromDataURL(iconURI, iconURL, 0,
-      Services.scriptSecurityManager.getSystemPrincipal());
-
-    yield new Promise(resolve => {
-      PlacesUtils.favicons.setAndFetchFaviconForPage(pageURI, iconURI, true,
-        PlacesUtils.favicons.FAVICON_LOAD_NON_PRIVATE, (iconURI, dataLen, data, mimeType) => {
-          resolve();
-        },
-        Services.scriptSecurityManager.getSystemPrincipal());
-    });
-    yield verifyTrackerEmpty();
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onLivemarkAdded() {
-  _("New livemarks should be tracked");
-
-  try {
-    yield startTracking();
-
-    _("Insert a livemark");
-    let livemark = yield PlacesUtils.livemarks.addLivemark({
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      // Use a local address just in case, to avoid potential aborts for
-      // non-local connections.
-      feedURI: Utils.makeURI("http://localhost:0"),
-    });
-    // Prevent the livemark refresh timer from requesting the URI.
-    livemark.terminate();
-
-    yield verifyTrackedItems(["menu", livemark.guid]);
-    // Three changes: one for the parent, one for creating the livemark
-    // folder, and one for setting the "livemark/feedURI" anno on the folder.
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onLivemarkDeleted() {
-  _("Deleted livemarks should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert a livemark");
-    let livemark = yield PlacesUtils.livemarks.addLivemark({
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      feedURI: Utils.makeURI("http://localhost:0"),
-    });
-    livemark.terminate();
-
-    yield startTracking();
-
-    _("Remove a livemark");
-    yield PlacesUtils.livemarks.removeLivemark({
-      guid: livemark.guid,
-    });
-
-    yield verifyTrackedItems(["menu", livemark.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
   } finally {
     _("Clean up.");
-    yield cleanup();
+    store.wipe();
+    tracker.clearChangedIDs();
+    tracker.resetScore();
+    Svc.Obs.notify("weave:engine:stop-tracking");
   }
-});
+}
 
-add_task(function* test_onItemMoved() {
-  _("Items moved via the synchronous API should be tracked");
+function test_onItemMoved() {
+  _("Verify we've got an empty tracker to work with.");
+  let tracker = engine._tracker;
+  do_check_empty(tracker.changedIDs);
+  do_check_eq(tracker.score, 0);
 
   try {
     let fx_id = PlacesUtils.bookmarks.insertBookmark(
@@ -948,590 +124,55 @@ add_task(function* test_onItemMoved() {
       PlacesUtils.bookmarks.DEFAULT_INDEX,
       "Get Firefox!");
     let fx_guid = engine._store.GUIDForId(fx_id);
-    _("Firefox GUID: " + fx_guid);
     let tb_id = PlacesUtils.bookmarks.insertBookmark(
       PlacesUtils.bookmarks.bookmarksMenuFolder,
       Utils.makeURI("http://getthunderbird.com"),
       PlacesUtils.bookmarks.DEFAULT_INDEX,
       "Get Thunderbird!");
     let tb_guid = engine._store.GUIDForId(tb_id);
-    _("Thunderbird GUID: " + tb_guid);
 
-    yield startTracking();
+    Svc.Obs.notify("weave:engine:start-tracking");
 
     // Moving within the folder will just track the folder.
     PlacesUtils.bookmarks.moveItem(
       tb_id, PlacesUtils.bookmarks.bookmarksMenuFolder, 0);
-    yield verifyTrackedItems(['menu']);
+    do_check_true(tracker.changedIDs['menu'] > 0);
+    do_check_eq(tracker.changedIDs['toolbar'], undefined);
+    do_check_eq(tracker.changedIDs[fx_guid], undefined);
+    do_check_eq(tracker.changedIDs[tb_guid], undefined);
     do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-    yield resetTracker();
+    tracker.clearChangedIDs();
+    tracker.resetScore();
 
     // Moving a bookmark to a different folder will track the old
     // folder, the new folder and the bookmark.
-    PlacesUtils.bookmarks.moveItem(fx_id, PlacesUtils.bookmarks.toolbarFolder,
+    PlacesUtils.bookmarks.moveItem(tb_id, PlacesUtils.bookmarks.toolbarFolder,
                                    PlacesUtils.bookmarks.DEFAULT_INDEX);
-    yield verifyTrackedItems(['menu', 'toolbar', fx_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemMoved_update() {
-  _("Items moved via the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    let fxBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let tbBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getthunderbird.com",
-      title: "Get Thunderbird!",
-    });
-
-    yield startTracking();
-
-    _("Repositioning a bookmark should track the folder");
-    yield PlacesUtils.bookmarks.update({
-      guid: tbBmk.guid,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      index: 0,
-    });
-    yield verifyTrackedItems(['menu']);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-    yield resetTracker();
-
-    _("Reparenting a bookmark should track both folders and the bookmark");
-    yield PlacesUtils.bookmarks.update({
-      guid: tbBmk.guid,
-      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
-      index: PlacesUtils.bookmarks.DEFAULT_INDEX,
-    });
-    yield verifyTrackedItems(['menu', 'toolbar', tbBmk.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemMoved_reorder() {
-  _("Items reordered via the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Insert out-of-order bookmarks");
-    let fxBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    _(`Firefox GUID: ${fxBmk.guid}`);
-
-    let tbBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getthunderbird.com",
-      title: "Get Thunderbird!",
-    });
-    _(`Thunderbird GUID: ${tbBmk.guid}`);
-
-    let mozBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "https://mozilla.org",
-      title: "Mozilla",
-    });
-    _(`Mozilla GUID: ${mozBmk.guid}`);
-
-    yield startTracking();
-
-    _("Reorder bookmarks");
-    yield PlacesUtils.bookmarks.reorder(PlacesUtils.bookmarks.menuGuid,
-      [mozBmk.guid, fxBmk.guid, tbBmk.guid]);
-
-    // As with setItemIndex, we should only track the folder if we reorder
-    // its children, but we should bump the score for every changed item.
-    yield verifyTrackedItems(["menu"]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemMoved_setItemIndex() {
-  _("Items with updated indices should be tracked");
-
-  try {
-    yield stopTracking();
-
-    let folder_id = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      "Test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder_guid = engine._store.GUIDForId(folder_id);
-    _(`Folder GUID: ${folder_guid}`);
-
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      folder_id,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Thunderbird");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-    _(`Thunderbird GUID: ${tb_guid}`);
-
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      folder_id,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Firefox");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-
-    let moz_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("https://mozilla.org"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Mozilla"
-    );
-    let moz_guid = engine._store.GUIDForId(moz_id);
-    _(`Mozilla GUID: ${moz_guid}`);
-
-    yield startTracking();
-
-    // PlacesSortFolderByNameTransaction exercises
-    // PlacesUtils.bookmarks.setItemIndex.
-    let txn = new PlacesSortFolderByNameTransaction(folder_id);
-
-    // We're reordering items within the same folder, so only the folder
-    // should be tracked.
-    _("Execute the sort folder transaction");
-    txn.doTransaction();
-    yield verifyTrackedItems([folder_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-    yield resetTracker();
-
-    _("Undo the sort folder transaction");
-    txn.undoTransaction();
-    yield verifyTrackedItems([folder_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemDeleted_removeFolderTransaction() {
-  _("Folders removed in a transaction should be tracked");
-
-  try {
-    yield stopTracking();
-
-    _("Create a folder with two children");
-    let folder_id = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      "Test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder_guid = engine._store.GUIDForId(folder_id);
-    _(`Folder GUID: ${folder_guid}`);
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      folder_id,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      folder_id,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-    _(`Thunderbird GUID: ${tb_guid}`);
-
-    yield startTracking();
-
-    let txn = PlacesUtils.bookmarks.getRemoveFolderTransaction(folder_id);
-    // We haven't executed the transaction yet.
-    yield verifyTrackerEmpty();
-
-    _("Execute the remove folder transaction");
-    txn.doTransaction();
-    yield verifyTrackedItems(["menu", folder_guid, fx_guid, tb_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 6);
-    yield resetTracker();
-
-    _("Undo the remove folder transaction");
-    txn.undoTransaction();
-
-    // At this point, the restored folder has the same ID, but a different GUID.
-    let new_folder_guid = yield PlacesUtils.promiseItemGuid(folder_id);
-
-    yield verifyTrackedItems(["menu", new_folder_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-    yield resetTracker();
-
-    _("Redo the transaction");
-    txn.redoTransaction();
-    yield verifyTrackedItems(["menu", new_folder_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_treeMoved() {
-  _("Moving an entire tree of bookmarks should track the parents");
-
-  try {
-    // Create a couple of parent folders.
-    let folder1_id = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      "First test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder1_guid = engine._store.GUIDForId(folder1_id);
-
-    // A second folder in the first.
-    let folder2_id = PlacesUtils.bookmarks.createFolder(
-      folder1_id,
-      "Second test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder2_guid = engine._store.GUIDForId(folder2_id);
-
-    // Create a couple of bookmarks in the second folder.
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      folder2_id,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      folder2_id,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-
-    yield startTracking();
-
-    // Move folder 2 to be a sibling of folder1.
-    PlacesUtils.bookmarks.moveItem(
-      folder2_id, PlacesUtils.bookmarks.bookmarksMenuFolder, 0);
-    // the menu and both folders should be tracked, the children should not be.
-    yield verifyTrackedItems(['menu', folder1_guid, folder2_guid]);
+    do_check_true(tracker.changedIDs['menu'] > 0);
+    do_check_true(tracker.changedIDs['toolbar'] > 0);
+    do_check_eq(tracker.changedIDs[fx_guid], undefined);
+    do_check_true(tracker.changedIDs[tb_guid] > 0);
     do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 3);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemDeleted() {
-  _("Bookmarks deleted via the synchronous API should be tracked");
-
-  try {
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-
-    yield startTracking();
-
-    // Delete the last item - the item and parent should be tracked.
-    PlacesUtils.bookmarks.removeItem(tb_id);
-
-    yield verifyTrackedItems(['menu', tb_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_async_onItemDeleted() {
-  _("Bookmarks deleted via the asynchronous API should be tracked");
-
-  try {
-    yield stopTracking();
-
-    let fxBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    let tbBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "http://getthunderbird.com",
-      title: "Get Thunderbird!",
-    });
-
-    yield startTracking();
-
-    _("Delete the first item");
-    yield PlacesUtils.bookmarks.remove(fxBmk.guid);
 
-    yield verifyTrackedItems(["menu", fxBmk.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 2);
   } finally {
     _("Clean up.");
-    yield cleanup();
+    store.wipe();
+    tracker.clearChangedIDs();
+    tracker.resetScore();
+    Svc.Obs.notify("weave:engine:stop-tracking");
   }
-});
-
-add_task(function* test_async_onItemDeleted_eraseEverything() {
-  _("Erasing everything should track all deleted items");
-
-  try {
-    yield stopTracking();
 
-    let fxBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.mobileGuid,
-      url: "http://getfirefox.com",
-      title: "Get Firefox!",
-    });
-    _(`Firefox GUID: ${fxBmk.guid}`);
-    let tbBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.mobileGuid,
-      url: "http://getthunderbird.com",
-      title: "Get Thunderbird!",
-    });
-    _(`Thunderbird GUID: ${tbBmk.guid}`);
-    let mozBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "https://mozilla.org",
-      title: "Mozilla",
-    });
-    _(`Mozilla GUID: ${mozBmk.guid}`);
-    let mdnBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: PlacesUtils.bookmarks.menuGuid,
-      url: "https://developer.mozilla.org",
-      title: "MDN",
-    });
-    _(`MDN GUID: ${mdnBmk.guid}`);
-    let bugsFolder = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: PlacesUtils.bookmarks.toolbarGuid,
-      title: "Bugs",
-    });
-    _(`Bugs folder GUID: ${bugsFolder.guid}`);
-    let bzBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: bugsFolder.guid,
-      url: "https://bugzilla.mozilla.org",
-      title: "Bugzilla",
-    });
-    _(`Bugzilla GUID: ${bzBmk.guid}`);
-    let bugsChildFolder = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_FOLDER,
-      parentGuid: bugsFolder.guid,
-      title: "Bugs child",
-    });
-    _(`Bugs child GUID: ${bugsChildFolder.guid}`);
-    let bugsGrandChildBmk = yield PlacesUtils.bookmarks.insert({
-      type: PlacesUtils.bookmarks.TYPE_BOOKMARK,
-      parentGuid: bugsChildFolder.guid,
-      url: "https://example.com",
-      title: "Bugs grandchild",
-    });
-    _(`Bugs grandchild GUID: ${bugsGrandChildBmk.guid}`);
-
-    yield startTracking();
-
-    yield PlacesUtils.bookmarks.eraseEverything();
-
-    // `eraseEverything` removes all items from the database before notifying
-    // observers. Because of this, grandchild lookup in the tracker's
-    // `onItemRemoved` observer will fail. That means we won't track
-    // (bzBmk.guid, bugsGrandChildBmk.guid, bugsChildFolder.guid), even
-    // though we should.
-    yield verifyTrackedItems(["menu", mozBmk.guid, mdnBmk.guid, "toolbar",
-                              bugsFolder.guid, "mobile", fxBmk.guid,
-                              tbBmk.guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 10);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemDeleted_removeFolderChildren() {
-  _("Removing a folder's children should track the folder and its children");
-
-  try {
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.mobileFolderId,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    _(`Firefox GUID: ${fx_guid}`);
-
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.mobileFolderId,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-    _(`Thunderbird GUID: ${tb_guid}`);
-
-    let moz_id = PlacesUtils.bookmarks.insertBookmark(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      Utils.makeURI("https://mozilla.org"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Mozilla"
-    );
-    let moz_guid = engine._store.GUIDForId(moz_id);
-    _(`Mozilla GUID: ${moz_guid}`);
-
-    yield startTracking();
-
-    _(`Mobile root ID: ${PlacesUtils.mobileFolderId}`);
-    PlacesUtils.bookmarks.removeFolderChildren(PlacesUtils.mobileFolderId);
-
-    yield verifyTrackedItems(["mobile", fx_guid, tb_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 4);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_onItemDeleted_tree() {
-  _("Deleting a tree of bookmarks should track all items");
-
-  try {
-    // Create a couple of parent folders.
-    let folder1_id = PlacesUtils.bookmarks.createFolder(
-      PlacesUtils.bookmarks.bookmarksMenuFolder,
-      "First test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder1_guid = engine._store.GUIDForId(folder1_id);
-
-    // A second folder in the first.
-    let folder2_id = PlacesUtils.bookmarks.createFolder(
-      folder1_id,
-      "Second test folder",
-      PlacesUtils.bookmarks.DEFAULT_INDEX);
-    let folder2_guid = engine._store.GUIDForId(folder2_id);
-
-    // Create a couple of bookmarks in the second folder.
-    let fx_id = PlacesUtils.bookmarks.insertBookmark(
-      folder2_id,
-      Utils.makeURI("http://getfirefox.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Firefox!");
-    let fx_guid = engine._store.GUIDForId(fx_id);
-    let tb_id = PlacesUtils.bookmarks.insertBookmark(
-      folder2_id,
-      Utils.makeURI("http://getthunderbird.com"),
-      PlacesUtils.bookmarks.DEFAULT_INDEX,
-      "Get Thunderbird!");
-    let tb_guid = engine._store.GUIDForId(tb_id);
-
-    yield startTracking();
-
-    // Delete folder2 - everything we created should be tracked.
-    PlacesUtils.bookmarks.removeItem(folder2_id);
-
-    yield verifyTrackedItems([fx_guid, tb_guid, folder1_guid, folder2_guid]);
-    do_check_eq(tracker.score, SCORE_INCREMENT_XLARGE * 6);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
-
-add_task(function* test_mobile_query() {
-  _("Ensure we correctly create the mobile query");
-
-  try {
-    // Creates the organizer queries as a side effect.
-    let leftPaneId = PlacesUIUtils.leftPaneFolderId;
-    _(`Left pane root ID: ${leftPaneId}`);
-
-    let allBookmarksIds = findAnnoItems("PlacesOrganizer/OrganizerQuery", "AllBookmarks");
-    equal(allBookmarksIds.length, 1, "Should create folder with all bookmarks queries");
-    let allBookmarkGuid = yield PlacesUtils.promiseItemGuid(allBookmarksIds[0]);
-
-    _("Try creating query after organizer is ready");
-    tracker._ensureMobileQuery();
-    let queryIds = findAnnoItems("PlacesOrganizer/OrganizerQuery", "MobileBookmarks");
-    equal(queryIds.length, 0, "Should not create query without any mobile bookmarks");
-
-    _("Insert mobile bookmark, then create query");
-    yield PlacesUtils.bookmarks.insert({
-      parentGuid: PlacesUtils.bookmarks.mobileGuid,
-      url: "https://mozilla.org",
-    });
-    tracker._ensureMobileQuery();
-    queryIds = findAnnoItems("PlacesOrganizer/OrganizerQuery", "MobileBookmarks", {});
-    equal(queryIds.length, 1, "Should create query once mobile bookmarks exist");
-
-    let queryId = queryIds[0];
-    let queryGuid = yield PlacesUtils.promiseItemGuid(queryId);
+}
 
-    let queryInfo = yield PlacesUtils.bookmarks.fetch(queryGuid);
-    equal(queryInfo.url, `place:folder=${PlacesUtils.mobileFolderId}`, "Query should point to mobile root");
-    equal(queryInfo.title, "Mobile Bookmarks", "Query title should be localized");
-    equal(queryInfo.parentGuid, allBookmarkGuid, "Should append mobile query to all bookmarks queries");
+function run_test() {
+  initTestLogging("Trace");
 
-    _("Rename root and query, then recreate");
-    yield PlacesUtils.bookmarks.update({
-      guid: PlacesUtils.bookmarks.mobileGuid,
-      title: "renamed root",
-    });
-    yield PlacesUtils.bookmarks.update({
-      guid: queryGuid,
-      title: "renamed query",
-    });
-    tracker._ensureMobileQuery();
-    let rootInfo = yield PlacesUtils.bookmarks.fetch(PlacesUtils.bookmarks.mobileGuid);
-    equal(rootInfo.title, "Mobile Bookmarks", "Should fix root title");
-    queryInfo = yield PlacesUtils.bookmarks.fetch(queryGuid);
-    equal(queryInfo.title, "Mobile Bookmarks", "Should fix query title");
+  Log.repository.getLogger("Sync.Engine.Bookmarks").level = Log.Level.Trace;
+  Log.repository.getLogger("Sync.Store.Bookmarks").level = Log.Level.Trace;
+  Log.repository.getLogger("Sync.Tracker.Bookmarks").level = Log.Level.Trace;
 
-    _("Point query to different folder");
-    yield PlacesUtils.bookmarks.update({
-      guid: queryGuid,
-      url: "place:folder=BOOKMARKS_MENU",
-    });
-    tracker._ensureMobileQuery();
-    queryInfo = yield PlacesUtils.bookmarks.fetch(queryGuid);
-    equal(queryInfo.url.href, `place:folder=${PlacesUtils.mobileFolderId}`,
-      "Should fix query URL to point to mobile root");
+  test_tracking();
+  test_onItemChanged();
+  test_onItemMoved();
+}
 
-    _("We shouldn't track the query or the left pane root");
-    yield verifyTrackedCount(0);
-    do_check_eq(tracker.score, 0);
-  } finally {
-    _("Clean up.");
-    yield cleanup();
-  }
-});
diff --git a/services/sync/tests/unit/test_bookmark_validator.js b/services/sync/tests/unit/test_bookmark_validator.js
deleted file mode 100644
index cc0b3b08f..000000000
--- a/services/sync/tests/unit/test_bookmark_validator.js
+++ /dev/null
@@ -1,347 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Components.utils.import("resource://services-sync/bookmark_validator.js");
-Components.utils.import("resource://services-sync/util.js");
-
-function inspectServerRecords(data) {
-  return new BookmarkValidator().inspectServerRecords(data);
-}
-
-add_test(function test_isr_rootOnServer() {
-  let c = inspectServerRecords([{
-    id: 'places',
-    type: 'folder',
-    children: [],
-  }]);
-  ok(c.problemData.rootOnServer);
-  run_next_test();
-});
-
-add_test(function test_isr_empty() {
-  let c = inspectServerRecords([]);
-  ok(!c.problemData.rootOnServer);
-  notEqual(c.root, null);
-  run_next_test();
-});
-
-add_test(function test_isr_cycles() {
-  let c = inspectServerRecords([
-    {id: 'C', type: 'folder', children: ['A', 'B'], parentid: 'places'},
-    {id: 'A', type: 'folder', children: ['B'], parentid: 'B'},
-    {id: 'B', type: 'folder', children: ['A'], parentid: 'A'},
-  ]).problemData;
-
-  equal(c.cycles.length, 1);
-  ok(c.cycles[0].indexOf('A') >= 0);
-  ok(c.cycles[0].indexOf('B') >= 0);
-  run_next_test();
-});
-
-add_test(function test_isr_orphansMultiParents() {
-  let c = inspectServerRecords([
-    { id: 'A', type: 'bookmark', parentid: 'D' },
-    { id: 'B', type: 'folder', parentid: 'places', children: ['A']},
-    { id: 'C', type: 'folder', parentid: 'places', children: ['A']},
-
-  ]).problemData;
-  deepEqual(c.orphans, [{ id: "A", parent: "D" }]);
-  equal(c.multipleParents.length, 1)
-  ok(c.multipleParents[0].parents.indexOf('B') >= 0);
-  ok(c.multipleParents[0].parents.indexOf('C') >= 0);
-  run_next_test();
-});
-
-add_test(function test_isr_orphansMultiParents2() {
-  let c = inspectServerRecords([
-    { id: 'A', type: 'bookmark', parentid: 'D' },
-    { id: 'B', type: 'folder', parentid: 'places', children: ['A']},
-  ]).problemData;
-  equal(c.orphans.length, 1);
-  equal(c.orphans[0].id, 'A');
-  equal(c.multipleParents.length, 0);
-  run_next_test();
-});
-
-add_test(function test_isr_deletedParents() {
-  let c = inspectServerRecords([
-    { id: 'A', type: 'bookmark', parentid: 'B' },
-    { id: 'B', type: 'folder', parentid: 'places', children: ['A']},
-    { id: 'B', type: 'item', deleted: true},
-  ]).problemData;
-  deepEqual(c.deletedParents, ['A'])
-  run_next_test();
-});
-
-add_test(function test_isr_badChildren() {
-  let c = inspectServerRecords([
-    { id: 'A', type: 'bookmark', parentid: 'places', children: ['B', 'C'] },
-    { id: 'C', type: 'bookmark', parentid: 'A' }
-  ]).problemData;
-  deepEqual(c.childrenOnNonFolder, ['A'])
-  deepEqual(c.missingChildren, [{parent: 'A', child: 'B'}]);
-  deepEqual(c.parentNotFolder, ['C']);
-  run_next_test();
-});
-
-
-add_test(function test_isr_parentChildMismatches() {
-  let c = inspectServerRecords([
-    { id: 'A', type: 'folder', parentid: 'places', children: [] },
-    { id: 'B', type: 'bookmark', parentid: 'A' }
-  ]).problemData;
-  deepEqual(c.parentChildMismatches, [{parent: 'A', child: 'B'}]);
-  run_next_test();
-});
-
-add_test(function test_isr_duplicatesAndMissingIDs() {
-  let c = inspectServerRecords([
-    {id: 'A', type: 'folder', parentid: 'places', children: []},
-    {id: 'A', type: 'folder', parentid: 'places', children: []},
-    {type: 'folder', parentid: 'places', children: []}
-  ]).problemData;
-  equal(c.missingIDs, 1);
-  deepEqual(c.duplicates, ['A']);
-  run_next_test();
-});
-
-add_test(function test_isr_duplicateChildren()  {
-  let c = inspectServerRecords([
-    {id: 'A', type: 'folder', parentid: 'places', children: ['B', 'B']},
-    {id: 'B', type: 'bookmark', parentid: 'A'},
-  ]).problemData;
-  deepEqual(c.duplicateChildren, ['A']);
-  run_next_test();
-});
-
-// Each compareServerWithClient test mutates these, so we can't just keep them
-// global
-function getDummyServerAndClient() {
-  let server = [
-    {
-      id: 'menu',
-      parentid: 'places',
-      type: 'folder',
-      parentName: '',
-      title: 'foo',
-      children: ['bbbbbbbbbbbb', 'cccccccccccc']
-    },
-    {
-      id: 'bbbbbbbbbbbb',
-      type: 'bookmark',
-      parentid: 'menu',
-      parentName: 'foo',
-      title: 'bar',
-      bmkUri: 'http://baz.com'
-    },
-    {
-      id: 'cccccccccccc',
-      parentid: 'menu',
-      parentName: 'foo',
-      title: '',
-      type: 'query',
-      bmkUri: 'place:type=6&sort=14&maxResults=10'
-    }
-  ];
-
-  let client = {
-    "guid": "root________",
-    "title": "",
-    "id": 1,
-    "type": "text/x-moz-place-container",
-    "children": [
-      {
-        "guid": "menu________",
-        "title": "foo",
-        "id": 1000,
-        "type": "text/x-moz-place-container",
-        "children": [
-          {
-            "guid": "bbbbbbbbbbbb",
-            "title": "bar",
-            "id": 1001,
-            "type": "text/x-moz-place",
-            "uri": "http://baz.com"
-          },
-          {
-            "guid": "cccccccccccc",
-            "title": "",
-            "id": 1002,
-            "annos": [{
-              "name": "Places/SmartBookmark",
-              "flags": 0,
-              "expires": 4,
-              "value": "RecentTags"
-            }],
-            "type": "text/x-moz-place",
-            "uri": "place:type=6&sort=14&maxResults=10"
-          }
-        ]
-      }
-    ]
-  };
-  return {server, client};
-}
-
-
-add_test(function test_cswc_valid() {
-  let {server, client} = getDummyServerAndClient();
-
-  let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-  equal(c.clientMissing.length, 0);
-  equal(c.serverMissing.length, 0);
-  equal(c.differences.length, 0);
-  run_next_test();
-});
-
-add_test(function test_cswc_serverMissing() {
-  let {server, client} = getDummyServerAndClient();
-  // remove c
-  server.pop();
-  server[0].children.pop();
-
-  let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-  deepEqual(c.serverMissing, ['cccccccccccc']);
-  equal(c.clientMissing.length, 0);
-  deepEqual(c.structuralDifferences, [{id: 'menu', differences: ['childGUIDs']}]);
-  run_next_test();
-});
-
-add_test(function test_cswc_clientMissing() {
-  let {server, client} = getDummyServerAndClient();
-  client.children[0].children.pop();
-
-  let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-  deepEqual(c.clientMissing, ['cccccccccccc']);
-  equal(c.serverMissing.length, 0);
-  deepEqual(c.structuralDifferences, [{id: 'menu', differences: ['childGUIDs']}]);
-  run_next_test();
-});
-
-add_test(function test_cswc_differences() {
-  {
-    let {server, client} = getDummyServerAndClient();
-    client.children[0].children[0].title = 'asdf';
-    let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-    equal(c.clientMissing.length, 0);
-    equal(c.serverMissing.length, 0);
-    deepEqual(c.differences, [{id: 'bbbbbbbbbbbb', differences: ['title']}]);
-  }
-
-  {
-    let {server, client} = getDummyServerAndClient();
-    server[2].type = 'bookmark';
-    let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-    equal(c.clientMissing.length, 0);
-    equal(c.serverMissing.length, 0);
-    deepEqual(c.differences, [{id: 'cccccccccccc', differences: ['type']}]);
-  }
-  run_next_test();
-});
-
-add_test(function test_cswc_serverUnexpected() {
-  let {server, client} = getDummyServerAndClient();
-  client.children.push({
-    "guid": "dddddddddddd",
-    "title": "",
-    "id": 2000,
-    "annos": [{
-      "name": "places/excludeFromBackup",
-      "flags": 0,
-      "expires": 4,
-      "value": 1
-    }, {
-      "name": "PlacesOrganizer/OrganizerFolder",
-      "flags": 0,
-      "expires": 4,
-      "value": 7
-    }],
-    "type": "text/x-moz-place-container",
-    "children": [{
-      "guid": "eeeeeeeeeeee",
-      "title": "History",
-      "annos": [{
-        "name": "places/excludeFromBackup",
-        "flags": 0,
-        "expires": 4,
-        "value": 1
-      }, {
-        "name": "PlacesOrganizer/OrganizerQuery",
-        "flags": 0,
-        "expires": 4,
-        "value": "History"
-      }],
-      "type": "text/x-moz-place",
-      "uri": "place:type=3&sort=4"
-    }]
-  });
-  server.push({
-    id: 'dddddddddddd',
-    parentid: 'places',
-    parentName: '',
-    title: '',
-    type: 'folder',
-    children: ['eeeeeeeeeeee']
-  }, {
-    id: 'eeeeeeeeeeee',
-    parentid: 'dddddddddddd',
-    parentName: '',
-    title: 'History',
-    type: 'query',
-    bmkUri: 'place:type=3&sort=4'
-  });
-
-  let c = new BookmarkValidator().compareServerWithClient(server, client).problemData;
-  equal(c.clientMissing.length, 0);
-  equal(c.serverMissing.length, 0);
-  equal(c.serverUnexpected.length, 2);
-  deepEqual(c.serverUnexpected, ["dddddddddddd", "eeeeeeeeeeee"]);
-  run_next_test();
-});
-
-function validationPing(server, client, duration) {
-  return wait_for_ping(function() {
-    // fake this entirely
-    Svc.Obs.notify("weave:service:sync:start");
-    Svc.Obs.notify("weave:engine:sync:start", null, "bookmarks");
-    Svc.Obs.notify("weave:engine:sync:finish", null, "bookmarks");
-    let validator = new BookmarkValidator();
-    let data = {
-      // We fake duration and version just so that we can verify they're passed through.
-      duration,
-      version: validator.version,
-      recordCount: server.length,
-      problems: validator.compareServerWithClient(server, client).problemData,
-    };
-    Svc.Obs.notify("weave:engine:validate:finish", data, "bookmarks");
-    Svc.Obs.notify("weave:service:sync:finish");
-  }, true); // Allow "failing" pings, since having validation info indicates failure.
-}
-
-add_task(function *test_telemetry_integration() {
-  let {server, client} = getDummyServerAndClient();
-  // remove "c"
-  server.pop();
-  server[0].children.pop();
-  const duration = 50;
-  let ping = yield validationPing(server, client, duration);
-  ok(ping.engines);
-  let bme = ping.engines.find(e => e.name === "bookmarks");
-  ok(bme);
-  ok(bme.validation);
-  ok(bme.validation.problems)
-  equal(bme.validation.checked, server.length);
-  equal(bme.validation.took, duration);
-  bme.validation.problems.sort((a, b) => String.localeCompare(a.name, b.name));
-  equal(bme.validation.version, new BookmarkValidator().version);
-  deepEqual(bme.validation.problems, [
-    { name: "badClientRoots", count: 3 },
-    { name: "sdiff:childGUIDs", count: 1 },
-    { name: "serverMissing", count: 1 },
-    { name: "structuralDifferences", count: 1 },
-  ]);
-});
-
-function run_test() {
-  run_next_test();
-}
diff --git a/services/sync/tests/unit/test_browserid_identity.js b/services/sync/tests/unit/test_browserid_identity.js
index 531c01bf6..f3cde9f8f 100644
--- a/services/sync/tests/unit/test_browserid_identity.js
+++ b/services/sync/tests/unit/test_browserid_identity.js
@@ -16,14 +16,13 @@ Cu.import("resource://gre/modules/FxAccountsCommon.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/status.js");
 Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-common/tokenserverclient.js");
 
 const SECOND_MS = 1000;
 const MINUTE_MS = SECOND_MS * 60;
 const HOUR_MS = MINUTE_MS * 60;
 
-var identityConfig = makeIdentityConfig();
-var browseridManager = new BrowserIDManager();
+let identityConfig = makeIdentityConfig();
+let browseridManager = new BrowserIDManager();
 configureFxAccountIdentity(browseridManager, identityConfig);
 
 /**
@@ -32,14 +31,11 @@ configureFxAccountIdentity(browseridManager, identityConfig);
  * headers.  We will use this to test clock skew compensation in these headers
  * below.
  */
-var MockFxAccountsClient = function() {
+let MockFxAccountsClient = function() {
   FxAccountsClient.apply(this);
 };
 MockFxAccountsClient.prototype = {
-  __proto__: FxAccountsClient.prototype,
-  accountStatus() {
-    return Promise.resolve(true);
-  }
+  __proto__: FxAccountsClient.prototype
 };
 
 function MockFxAccounts() {
@@ -77,7 +73,7 @@ add_test(function test_initial_state() {
   }
 );
 
-add_task(function* test_initialializeWithCurrentIdentity() {
+add_task(function test_initialializeWithCurrentIdentity() {
     _("Verify start after initializeWithCurrentIdentity");
     browseridManager.initializeWithCurrentIdentity();
     yield browseridManager.whenReadyToAuthenticate.promise;
@@ -87,57 +83,7 @@ add_task(function* test_initialializeWithCurrentIdentity() {
   }
 );
 
-add_task(function* test_initialializeWithAuthErrorAndDeletedAccount() {
-    _("Verify sync unpair after initializeWithCurrentIdentity with auth error + account deleted");
-
-    var identityConfig = makeIdentityConfig();
-    var browseridManager = new BrowserIDManager();
-
-    // Use the real `_getAssertion` method that calls
-    // `mockFxAClient.signCertificate`.
-    let fxaInternal = makeFxAccountsInternalMock(identityConfig);
-    delete fxaInternal._getAssertion;
-
-    configureFxAccountIdentity(browseridManager, identityConfig, fxaInternal);
-    browseridManager._fxaService.internal.initialize();
-
-    let signCertificateCalled = false;
-    let accountStatusCalled = false;
-
-    let MockFxAccountsClient = function() {
-      FxAccountsClient.apply(this);
-    };
-    MockFxAccountsClient.prototype = {
-      __proto__: FxAccountsClient.prototype,
-      signCertificate() {
-        signCertificateCalled = true;
-        return Promise.reject({
-          code: 401,
-          errno: ERRNO_INVALID_AUTH_TOKEN,
-        });
-      },
-      accountStatus() {
-        accountStatusCalled = true;
-        return Promise.resolve(false);
-      }
-    };
-
-    let mockFxAClient = new MockFxAccountsClient();
-    browseridManager._fxaService.internal._fxAccountsClient = mockFxAClient;
-
-    yield browseridManager.initializeWithCurrentIdentity();
-    yield Assert.rejects(browseridManager.whenReadyToAuthenticate.promise,
-                     "should reject due to an auth error");
-
-    do_check_true(signCertificateCalled);
-    do_check_true(accountStatusCalled);
-    do_check_false(browseridManager.account);
-    do_check_false(browseridManager._token);
-    do_check_false(browseridManager.hasValidToken());
-    do_check_false(browseridManager.account);
-});
-
-add_task(function* test_initialializeWithNoKeys() {
+add_task(function test_initialializeWithNoKeys() {
     _("Verify start after initializeWithCurrentIdentity without kA, kB or keyFetchToken");
     let identityConfig = makeIdentityConfig();
     delete identityConfig.fxaccount.user.kA;
@@ -306,7 +252,7 @@ add_test(function test_RESTResourceAuthenticatorSkew() {
   run_next_test();
 });
 
-add_task(function* test_ensureLoggedIn() {
+add_task(function test_ensureLoggedIn() {
   configureFxAccountIdentity(browseridManager);
   yield browseridManager.initializeWithCurrentIdentity();
   yield browseridManager.whenReadyToAuthenticate.promise;
@@ -318,8 +264,8 @@ add_task(function* test_ensureLoggedIn() {
 
   // arrange for no logged in user.
   let fxa = browseridManager._fxaService
-  let signedInUser = fxa.internal.currentAccountState.storageManager.accountData;
-  fxa.internal.currentAccountState.storageManager.accountData = null;
+  let signedInUser = fxa.internal.currentAccountState.signedInUser;
+  fxa.internal.currentAccountState.signedInUser = null;
   browseridManager.initializeWithCurrentIdentity();
   Assert.ok(!browseridManager._shouldHaveSyncKeyBundle,
             "_shouldHaveSyncKeyBundle should be false so we know we are testing what we think we are.");
@@ -327,8 +273,7 @@ add_task(function* test_ensureLoggedIn() {
   yield Assert.rejects(browseridManager.ensureLoggedIn(), "expecting rejection due to no user");
   Assert.ok(browseridManager._shouldHaveSyncKeyBundle,
             "_shouldHaveSyncKeyBundle should always be true after ensureLogin completes.");
-  // Restore the logged in user to what it was.
-  fxa.internal.currentAccountState.storageManager.accountData = signedInUser;
+  fxa.internal.currentAccountState.signedInUser = signedInUser;
   Status.login = LOGIN_FAILED_LOGIN_REJECTED;
   yield Assert.rejects(browseridManager.ensureLoggedIn(),
                        "LOGIN_FAILED_LOGIN_REJECTED should have caused immediate rejection");
@@ -404,7 +349,7 @@ add_test(function test_computeXClientStateHeader() {
   run_next_test();
 });
 
-add_task(function* test_getTokenErrors() {
+add_task(function test_getTokenErrors() {
   _("BrowserIDManager correctly handles various failures to get a token.");
 
   _("Arrange for a 401 - Sync should reflect an auth error.");
@@ -437,75 +382,7 @@ add_task(function* test_getTokenErrors() {
   Assert.equal(Status.login, LOGIN_FAILED_NETWORK_ERROR, "login state is LOGIN_FAILED_NETWORK_ERROR");
 });
 
-add_task(function* test_refreshCertificateOn401() {
-  _("BrowserIDManager refreshes the FXA certificate after a 401.");
-  var identityConfig = makeIdentityConfig();
-  var browseridManager = new BrowserIDManager();
-  // Use the real `_getAssertion` method that calls
-  // `mockFxAClient.signCertificate`.
-  let fxaInternal = makeFxAccountsInternalMock(identityConfig);
-  delete fxaInternal._getAssertion;
-  configureFxAccountIdentity(browseridManager, identityConfig, fxaInternal);
-  browseridManager._fxaService.internal.initialize();
-
-  let getCertCount = 0;
-
-  let MockFxAccountsClient = function() {
-    FxAccountsClient.apply(this);
-  };
-  MockFxAccountsClient.prototype = {
-    __proto__: FxAccountsClient.prototype,
-    signCertificate() {
-      ++getCertCount;
-    }
-  };
-
-  let mockFxAClient = new MockFxAccountsClient();
-  browseridManager._fxaService.internal._fxAccountsClient = mockFxAClient;
-
-  let didReturn401 = false;
-  let didReturn200 = false;
-  let mockTSC = mockTokenServer(() => {
-    if (getCertCount <= 1) {
-      didReturn401 = true;
-      return {
-        status: 401,
-        headers: {"content-type": "application/json"},
-        body: JSON.stringify({}),
-      };
-    } else {
-      didReturn200 = true;
-      return {
-        status: 200,
-        headers: {"content-type": "application/json"},
-        body: JSON.stringify({
-          id:           "id",
-          key:          "key",
-          api_endpoint: "http://example.com/",
-          uid:          "uid",
-          duration:     300,
-        })
-      };
-    }
-  });
-
-  browseridManager._tokenServerClient = mockTSC;
-
-  yield browseridManager.initializeWithCurrentIdentity();
-  yield browseridManager.whenReadyToAuthenticate.promise;
-
-  do_check_eq(getCertCount, 2);
-  do_check_true(didReturn401);
-  do_check_true(didReturn200);
-  do_check_true(browseridManager.account);
-  do_check_true(browseridManager._token);
-  do_check_true(browseridManager.hasValidToken());
-  do_check_true(browseridManager.account);
-});
-
-
-
-add_task(function* test_getTokenErrorWithRetry() {
+add_task(function test_getTokenErrorWithRetry() {
   _("tokenserver sends an observer notification on various backoff headers.");
 
   // Set Sync's backoffInterval to zero - after we simulated the backoff header
@@ -547,7 +424,7 @@ add_task(function* test_getTokenErrorWithRetry() {
   Assert.ok(Status.backoffInterval >= 200000);
 });
 
-add_task(function* test_getKeysErrorWithBackoff() {
+add_task(function test_getKeysErrorWithBackoff() {
   _("Auth server (via hawk) sends an observer notification on backoff headers.");
 
   // Set Sync's backoffInterval to zero - after we simulated the backoff header
@@ -581,7 +458,7 @@ add_task(function* test_getKeysErrorWithBackoff() {
   Assert.ok(Status.backoffInterval >= 100000);
 });
 
-add_task(function* test_getKeysErrorWithRetry() {
+add_task(function test_getKeysErrorWithRetry() {
   _("Auth server (via hawk) sends an observer notification on retry headers.");
 
   // Set Sync's backoffInterval to zero - after we simulated the backoff header
@@ -615,7 +492,7 @@ add_task(function* test_getKeysErrorWithRetry() {
   Assert.ok(Status.backoffInterval >= 100000);
 });
 
-add_task(function* test_getHAWKErrors() {
+add_task(function test_getHAWKErrors() {
   _("BrowserIDManager correctly handles various HAWK failures.");
 
   _("Arrange for a 401 - Sync should reflect an auth error.");
@@ -648,7 +525,7 @@ add_task(function* test_getHAWKErrors() {
   Assert.equal(Status.login, LOGIN_FAILED_NETWORK_ERROR, "login state is LOGIN_FAILED_NETWORK_ERROR");
 });
 
-add_task(function* test_getGetKeysFailing401() {
+add_task(function test_getGetKeysFailing401() {
   _("BrowserIDManager correctly handles 401 responses fetching keys.");
 
   _("Arrange for a 401 - Sync should reflect an auth error.");
@@ -669,7 +546,7 @@ add_task(function* test_getGetKeysFailing401() {
   Assert.equal(Status.login, LOGIN_FAILED_LOGIN_REJECTED, "login was rejected");
 });
 
-add_task(function* test_getGetKeysFailing503() {
+add_task(function test_getGetKeysFailing503() {
   _("BrowserIDManager correctly handles 5XX responses fetching keys.");
 
   _("Arrange for a 503 - Sync should reflect a network error.");
@@ -690,7 +567,7 @@ add_task(function* test_getGetKeysFailing503() {
   Assert.equal(Status.login, LOGIN_FAILED_NETWORK_ERROR, "state reflects network error");
 });
 
-add_task(function* test_getKeysMissing() {
+add_task(function test_getKeysMissing() {
   _("BrowserIDManager correctly handles getKeys succeeding but not returning keys.");
 
   let browseridManager = new BrowserIDManager();
@@ -708,17 +585,7 @@ add_task(function* test_getKeysMissing() {
     fetchAndUnwrapKeys: function () {
       return Promise.resolve({});
     },
-    fxAccountsClient: new MockFxAccountsClient(),
-    newAccountState(credentials) {
-      // We only expect this to be called with null indicating the (mock)
-      // storage should be read.
-      if (credentials) {
-        throw new Error("Not expecting to have credentials passed");
-      }
-      let storageManager = new MockFxaStorageManager();
-      storageManager.initialize(identityConfig.fxaccount.user);
-      return new AccountState(storageManager);
-    },
+    fxAccountsClient: new MockFxAccountsClient()
   });
 
   // Add a mock to the currentAccountState object.
@@ -730,6 +597,9 @@ add_task(function* test_getKeysMissing() {
     return Promise.resolve(this.cert.cert);
   };
 
+  // Ensure the new FxAccounts mock has a signed-in user.
+  fxa.internal.currentAccountState.signedInUser = browseridManager._fxaService.internal.currentAccountState.signedInUser;
+
   browseridManager._fxaService = fxa;
 
   yield browseridManager.initializeWithCurrentIdentity();
@@ -744,41 +614,6 @@ add_task(function* test_getKeysMissing() {
   Assert.ok(ex.message.indexOf("missing kA or kB") >= 0);
 });
 
-add_task(function* test_signedInUserMissing() {
-  _("BrowserIDManager detects getSignedInUser returning incomplete account data");
-
-  let browseridManager = new BrowserIDManager();
-  let config = makeIdentityConfig();
-  // Delete stored keys and the key fetch token.
-  delete identityConfig.fxaccount.user.kA;
-  delete identityConfig.fxaccount.user.kB;
-  delete identityConfig.fxaccount.user.keyFetchToken;
-
-  configureFxAccountIdentity(browseridManager, identityConfig);
-
-  let fxa = new FxAccounts({
-    fetchAndUnwrapKeys: function () {
-      return Promise.resolve({});
-    },
-    fxAccountsClient: new MockFxAccountsClient(),
-    newAccountState(credentials) {
-      // We only expect this to be called with null indicating the (mock)
-      // storage should be read.
-      if (credentials) {
-        throw new Error("Not expecting to have credentials passed");
-      }
-      let storageManager = new MockFxaStorageManager();
-      storageManager.initialize(identityConfig.fxaccount.user);
-      return new AccountState(storageManager);
-    },
-  });
-
-  browseridManager._fxaService = fxa;
-
-  let status = yield browseridManager.unlockAndVerifyAuthState();
-  Assert.equal(status, LOGIN_FAILED_LOGIN_REJECTED);
-});
-
 // End of tests
 // Utility functions follow
 
@@ -803,17 +638,7 @@ function* initializeIdentityWithHAWKResponseFactory(config, cbGetResponse) {
       callback.call(this);
     },
     get: function(callback) {
-      // Skip /status requests (browserid_identity checks if the account still
-      // exists after an auth error)
-      if (this._uri.startsWith("http://mockedserver:9999/account/status")) {
-        this.response = {
-          status: 200,
-          headers: {"content-type": "application/json"},
-          body: JSON.stringify({exists: true}),
-        };
-      } else {
-        this.response = cbGetResponse("get", null, this._uri, this._credentials, this._extra);
-      }
+      this.response = cbGetResponse("get", null, this._uri, this._credentials, this._extra);
       callback.call(this);
     }
   }
@@ -833,18 +658,11 @@ function* initializeIdentityWithHAWKResponseFactory(config, cbGetResponse) {
   fxaClient.hawk = new MockedHawkClient();
   let internal = {
     fxAccountsClient: fxaClient,
-    newAccountState(credentials) {
-      // We only expect this to be called with null indicating the (mock)
-      // storage should be read.
-      if (credentials) {
-        throw new Error("Not expecting to have credentials passed");
-      }
-      let storageManager = new MockFxaStorageManager();
-      storageManager.initialize(config.fxaccount.user);
-      return new AccountState(storageManager);
-    },
   }
   let fxa = new FxAccounts(internal);
+  fxa.internal.currentAccountState.signedInUser = {
+      accountData: config.fxaccount.user,
+  };
 
   browseridManager._fxaService = fxa;
   browseridManager._signedInUser = null;
@@ -862,29 +680,3 @@ function getTimestampDelta(hawkAuthHeader, now=Date.now()) {
   return Math.abs(getTimestamp(hawkAuthHeader) - now);
 }
 
-function mockTokenServer(func) {
-  let requestLog = Log.repository.getLogger("testing.mock-rest");
-  if (!requestLog.appenders.length) { // might as well see what it says :)
-    requestLog.addAppender(new Log.DumpAppender());
-    requestLog.level = Log.Level.Trace;
-  }
-  function MockRESTRequest(url) {};
-  MockRESTRequest.prototype = {
-    _log: requestLog,
-    setHeader: function() {},
-    get: function(callback) {
-      this.response = func();
-      callback.call(this);
-    }
-  }
-  // The mocked TokenServer client which will get the response.
-  function MockTSC() { }
-  MockTSC.prototype = new TokenServerClient();
-  MockTSC.prototype.constructor = MockTSC;
-  MockTSC.prototype.newRESTRequest = function(url) {
-    return new MockRESTRequest(url);
-  }
-  // Arrange for the same observerPrefix as browserid_identity uses.
-  MockTSC.prototype.observerPrefix = "weave:service";
-  return new MockTSC();
-}
diff --git a/services/sync/tests/unit/test_clients_engine.js b/services/sync/tests/unit/test_clients_engine.js
index d2123f80a..919913f82 100644
--- a/services/sync/tests/unit/test_clients_engine.js
+++ b/services/sync/tests/unit/test_clients_engine.js
@@ -12,7 +12,7 @@ Cu.import("resource://testing-common/services/sync/utils.js");
 const MORE_THAN_CLIENTS_TTL_REFRESH = 691200; // 8 days
 const LESS_THAN_CLIENTS_TTL_REFRESH = 86400;  // 1 day
 
-var engine = Service.clientsEngine;
+let engine = Service.clientsEngine;
 
 /**
  * Unpack the record with this ID, and verify that it has the same version that
@@ -31,10 +31,10 @@ function check_record_version(user, id) {
     let cleartext = rec.decrypt(Service.collectionKeys.keyForCollection("clients"));
 
     _("Payload is " + JSON.stringify(cleartext));
-    equal(Services.appinfo.version, cleartext.version);
-    equal(2, cleartext.protocols.length);
-    equal("1.1", cleartext.protocols[0]);
-    equal("1.5", cleartext.protocols[1]);
+    do_check_eq(Services.appinfo.version, cleartext.version);
+    do_check_eq(2, cleartext.protocols.length);
+    do_check_eq("1.1", cleartext.protocols[0]);
+    do_check_eq("1.5", cleartext.protocols[1]);
 }
 
 add_test(function test_bad_hmac() {
@@ -64,7 +64,7 @@ add_test(function test_bad_hmac() {
     let coll  = user.collection("clients");
 
     // Treat a non-existent collection as empty.
-    equal(expectedCount, coll ? coll.count() : 0, stack);
+    do_check_eq(expectedCount, coll ? coll.count() : 0, stack);
   }
 
   function check_client_deleted(id) {
@@ -77,7 +77,7 @@ add_test(function test_bad_hmac() {
     generateNewKeys(Service.collectionKeys);
     let serverKeys = Service.collectionKeys.asWBO("crypto", "keys");
     serverKeys.encrypt(Service.identity.syncKeyBundle);
-    ok(serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success);
+    do_check_true(serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success);
   }
 
   try {
@@ -89,11 +89,11 @@ add_test(function test_bad_hmac() {
     generateNewKeys(Service.collectionKeys);
 
     _("First sync, client record is uploaded");
-    equal(engine.lastRecordUpload, 0);
+    do_check_eq(engine.lastRecordUpload, 0);
     check_clients_count(0);
     engine._sync();
     check_clients_count(1);
-    ok(engine.lastRecordUpload > 0);
+    do_check_true(engine.lastRecordUpload > 0);
 
     // Our uploaded record has a version.
     check_record_version(user, engine.localID);
@@ -109,7 +109,7 @@ add_test(function test_bad_hmac() {
     generateNewKeys(Service.collectionKeys);
     let serverKeys = Service.collectionKeys.asWBO("crypto", "keys");
     serverKeys.encrypt(Service.identity.syncKeyBundle);
-    ok(serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success);
+    do_check_true(serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success);
 
     _("Sync.");
     engine._sync();
@@ -130,8 +130,8 @@ add_test(function test_bad_hmac() {
     engine._sync();
 
     _("Old record was not deleted, new one uploaded.");
-    equal(deletedCollections.length, 0);
-    equal(deletedItems.length, 0);
+    do_check_eq(deletedCollections.length, 0);
+    do_check_eq(deletedItems.length, 0);
     check_clients_count(2);
 
     _("Now try the scenario where our keys are wrong *and* there's a bad record.");
@@ -162,14 +162,14 @@ add_test(function test_bad_hmac() {
     generateNewKeys(Service.collectionKeys);
     let oldKey = Service.collectionKeys.keyForCollection();
 
-    equal(deletedCollections.length, 0);
-    equal(deletedItems.length, 0);
+    do_check_eq(deletedCollections.length, 0);
+    do_check_eq(deletedItems.length, 0);
     engine._sync();
-    equal(deletedItems.length, 1);
+    do_check_eq(deletedItems.length, 1);
     check_client_deleted(oldLocalID);
     check_clients_count(1);
     let newKey = Service.collectionKeys.keyForCollection();
-    ok(!oldKey.equals(newKey));
+    do_check_false(oldKey.equals(newKey));
 
   } finally {
     Svc.Prefs.resetBranch("");
@@ -181,91 +181,18 @@ add_test(function test_bad_hmac() {
 add_test(function test_properties() {
   _("Test lastRecordUpload property");
   try {
-    equal(Svc.Prefs.get("clients.lastRecordUpload"), undefined);
-    equal(engine.lastRecordUpload, 0);
+    do_check_eq(Svc.Prefs.get("clients.lastRecordUpload"), undefined);
+    do_check_eq(engine.lastRecordUpload, 0);
 
     let now = Date.now();
     engine.lastRecordUpload = now / 1000;
-    equal(engine.lastRecordUpload, Math.floor(now / 1000));
+    do_check_eq(engine.lastRecordUpload, Math.floor(now / 1000));
   } finally {
     Svc.Prefs.resetBranch("");
     run_next_test();
   }
 });
 
-add_test(function test_full_sync() {
-  _("Ensure that Clients engine fetches all records for each sync.");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let activeID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(activeID, encryptPayload({
-    id: activeID,
-    name: "Active client",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  let deletedID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(deletedID, encryptPayload({
-    id: deletedID,
-    name: "Client to delete",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. 2 records downloaded; our record uploaded.");
-    strictEqual(engine.lastRecordUpload, 0);
-    engine._sync();
-    ok(engine.lastRecordUpload > 0);
-    deepEqual(user.collection("clients").keys().sort(),
-              [activeID, deletedID, engine.localID].sort(),
-              "Our record should be uploaded on first sync");
-    deepEqual(Object.keys(store.getAllIDs()).sort(),
-              [activeID, deletedID, engine.localID].sort(),
-              "Other clients should be downloaded on first sync");
-
-    _("Delete a record, then sync again");
-    let collection = server.getCollection("foo", "clients");
-    collection.remove(deletedID);
-    // Simulate a timestamp update in info/collections.
-    engine.lastModified = now;
-    engine._sync();
-
-    _("Record should be updated");
-    deepEqual(Object.keys(store.getAllIDs()).sort(),
-              [activeID, engine.localID].sort(),
-              "Deleted client should be removed on next sync");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
 add_test(function test_sync() {
   _("Ensure that Clients engine uploads a new client record once a week.");
 
@@ -288,30 +215,30 @@ add_test(function test_sync() {
   try {
 
     _("First sync. Client record is uploaded.");
-    equal(clientWBO(), undefined);
-    equal(engine.lastRecordUpload, 0);
+    do_check_eq(clientWBO(), undefined);
+    do_check_eq(engine.lastRecordUpload, 0);
     engine._sync();
-    ok(!!clientWBO().payload);
-    ok(engine.lastRecordUpload > 0);
+    do_check_true(!!clientWBO().payload);
+    do_check_true(engine.lastRecordUpload > 0);
 
     _("Let's time travel more than a week back, new record should've been uploaded.");
     engine.lastRecordUpload -= MORE_THAN_CLIENTS_TTL_REFRESH;
     let lastweek = engine.lastRecordUpload;
     clientWBO().payload = undefined;
     engine._sync();
-    ok(!!clientWBO().payload);
-    ok(engine.lastRecordUpload > lastweek);
+    do_check_true(!!clientWBO().payload);
+    do_check_true(engine.lastRecordUpload > lastweek);
 
     _("Remove client record.");
     engine.removeClientData();
-    equal(clientWBO().payload, undefined);
+    do_check_eq(clientWBO().payload, undefined);
 
     _("Time travel one day back, no record uploaded.");
     engine.lastRecordUpload -= LESS_THAN_CLIENTS_TTL_REFRESH;
     let yesterday = engine.lastRecordUpload;
     engine._sync();
-    equal(clientWBO().payload, undefined);
-    equal(engine.lastRecordUpload, yesterday);
+    do_check_eq(clientWBO().payload, undefined);
+    do_check_eq(engine.lastRecordUpload, yesterday);
 
   } finally {
     Svc.Prefs.resetBranch("");
@@ -336,16 +263,16 @@ add_test(function test_client_name_change() {
 
   let initialScore = tracker.score;
 
-  equal(Object.keys(tracker.changedIDs).length, 0);
+  do_check_eq(Object.keys(tracker.changedIDs).length, 0);
 
   Svc.Prefs.set("client.name", "new name");
 
   _("new name: " + engine.localName);
-  notEqual(initialName, engine.localName);
-  equal(Object.keys(tracker.changedIDs).length, 1);
-  ok(engine.localID in tracker.changedIDs);
-  ok(tracker.score > initialScore);
-  ok(tracker.score >= SCORE_INCREMENT_XLARGE);
+  do_check_neq(initialName, engine.localName);
+  do_check_eq(Object.keys(tracker.changedIDs).length, 1);
+  do_check_true(engine.localID in tracker.changedIDs);
+  do_check_true(tracker.score > initialScore);
+  do_check_true(tracker.score >= SCORE_INCREMENT_XLARGE);
 
   Svc.Obs.notify("weave:engine:stop-tracking");
 
@@ -369,16 +296,15 @@ add_test(function test_send_command() {
   engine._sendCommandToClient(action, args, remoteId);
 
   let newRecord = store._remoteClients[remoteId];
-  let clientCommands = engine._readCommands()[remoteId];
-  notEqual(newRecord, undefined);
-  equal(clientCommands.length, 1);
+  do_check_neq(newRecord, undefined);
+  do_check_eq(newRecord.commands.length, 1);
 
-  let command = clientCommands[0];
-  equal(command.command, action);
-  equal(command.args.length, 2);
-  deepEqual(command.args, args);
+  let command = newRecord.commands[0];
+  do_check_eq(command.command, action);
+  do_check_eq(command.args.length, 2);
+  do_check_eq(command.args, args);
 
-  notEqual(tracker.changedIDs[remoteId], undefined);
+  do_check_neq(tracker.changedIDs[remoteId], undefined);
 
   run_next_test();
 });
@@ -402,7 +328,7 @@ add_test(function test_command_validation() {
     ["__UNKNOWN__", [],       false]
   ];
 
-  for (let [action, args, expectedResult] of testCommands) {
+  for each (let [action, args, expectedResult] in testCommands) {
     let remoteId = Utils.makeGUID();
     let rec = new ClientsRec("clients", remoteId);
 
@@ -412,26 +338,24 @@ add_test(function test_command_validation() {
     engine.sendCommand(action, args, remoteId);
 
     let newRecord = store._remoteClients[remoteId];
-    notEqual(newRecord, undefined);
-
-    let clientCommands = engine._readCommands()[remoteId];
+    do_check_neq(newRecord, undefined);
 
     if (expectedResult) {
       _("Ensuring command is sent: " + action);
-      equal(clientCommands.length, 1);
+      do_check_eq(newRecord.commands.length, 1);
 
-      let command = clientCommands[0];
-      equal(command.command, action);
-      deepEqual(command.args, args);
+      let command = newRecord.commands[0];
+      do_check_eq(command.command, action);
+      do_check_eq(command.args, args);
 
-      notEqual(engine._tracker, undefined);
-      notEqual(engine._tracker.changedIDs[remoteId], undefined);
+      do_check_neq(engine._tracker, undefined);
+      do_check_neq(engine._tracker.changedIDs[remoteId], undefined);
     } else {
       _("Ensuring command is scrubbed: " + action);
-      equal(clientCommands, undefined);
+      do_check_eq(newRecord.commands, undefined);
 
       if (store._tracker) {
-        equal(engine._tracker[remoteId], undefined);
+        do_check_eq(engine._tracker[remoteId], undefined);
       }
     }
 
@@ -455,11 +379,10 @@ add_test(function test_command_duplication() {
   engine.sendCommand(action, args, remoteId);
 
   let newRecord = store._remoteClients[remoteId];
-  let clientCommands = engine._readCommands()[remoteId];
-  equal(clientCommands.length, 1);
+  do_check_eq(newRecord.commands.length, 1);
 
   _("Check variant args length");
-  engine._saveCommands({});
+  newRecord.commands = [];
 
   action = "resetEngine";
   engine.sendCommand(action, [{ x: "foo" }], remoteId);
@@ -468,8 +391,7 @@ add_test(function test_command_duplication() {
   _("Make sure we spot a real dupe argument.");
   engine.sendCommand(action, [{ x: "bar" }], remoteId);
 
-  clientCommands = engine._readCommands()[remoteId];
-  equal(clientCommands.length, 2);
+  do_check_eq(newRecord.commands.length, 2);
 
   run_next_test();
 });
@@ -486,7 +408,7 @@ add_test(function test_command_invalid_client() {
     error = ex;
   }
 
-  equal(error.message.indexOf("Unknown remote client ID: "), 0);
+  do_check_eq(error.message.indexOf("Unknown remote client ID: "), 0);
 
   run_next_test();
 });
@@ -500,174 +422,13 @@ add_test(function test_process_incoming_commands() {
 
   var handler = function() {
     Svc.Obs.remove(ev, handler);
-
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
     run_next_test();
   };
 
   Svc.Obs.add(ev, handler);
 
   // logout command causes processIncomingCommands to return explicit false.
-  ok(!engine.processIncomingCommands());
-});
-
-add_test(function test_filter_duplicate_names() {
-  _("Ensure that we exclude clients with identical names that haven't synced in a week.");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  // Synced recently.
-  let recentID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(recentID, encryptPayload({
-    id: recentID,
-    name: "My Phone",
-    type: "mobile",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  // Dupe of our client, synced more than 1 week ago.
-  let dupeID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(dupeID, encryptPayload({
-    id: dupeID,
-    name: engine.localName,
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 604810));
-
-  // Synced more than 1 week ago, but not a dupe.
-  let oldID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(oldID, encryptPayload({
-    id: oldID,
-    name: "My old desktop",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 604820));
-
-  try {
-    let store = engine._store;
-
-    _("First sync");
-    strictEqual(engine.lastRecordUpload, 0);
-    engine._sync();
-    ok(engine.lastRecordUpload > 0);
-    deepEqual(user.collection("clients").keys().sort(),
-              [recentID, dupeID, oldID, engine.localID].sort(),
-              "Our record should be uploaded on first sync");
-
-    deepEqual(Object.keys(store.getAllIDs()).sort(),
-              [recentID, dupeID, oldID, engine.localID].sort(),
-              "Duplicate ID should remain in getAllIDs");
-    ok(engine._store.itemExists(dupeID), "Dupe ID should be considered as existing for Sync methods.");
-    ok(!engine.remoteClientExists(dupeID), "Dupe ID should not be considered as existing for external methods.");
-
-    // dupe desktop should not appear in .deviceTypes.
-    equal(engine.deviceTypes.get("desktop"), 2);
-    equal(engine.deviceTypes.get("mobile"), 1);
-
-    // dupe desktop should not appear in stats
-    deepEqual(engine.stats, {
-      hasMobile: 1,
-      names: [engine.localName, "My Phone", "My old desktop"],
-      numClients: 3,
-    });
-
-    ok(engine.remoteClientExists(oldID), "non-dupe ID should exist.");
-    ok(!engine.remoteClientExists(dupeID), "dupe ID should not exist");
-    equal(engine.remoteClients.length, 2, "dupe should not be in remoteClients");
-
-    // Check that a subsequent Sync doesn't report anything as being processed.
-    let counts;
-    Svc.Obs.add("weave:engine:sync:applied", function observe(subject, data) {
-      Svc.Obs.remove("weave:engine:sync:applied", observe);
-      counts = subject;
-    });
-
-    engine._sync();
-    equal(counts.applied, 0); // We didn't report applying any records.
-    equal(counts.reconciled, 4); // We reported reconcilliation for all records
-    equal(counts.succeeded, 0);
-    equal(counts.failed, 0);
-    equal(counts.newFailed, 0);
-
-    _("Broadcast logout to all clients");
-    engine.sendCommand("logout", []);
-    engine._sync();
-
-    let collection = server.getCollection("foo", "clients");
-    let recentPayload = JSON.parse(JSON.parse(collection.payload(recentID)).ciphertext);
-    deepEqual(recentPayload.commands, [{ command: "logout", args: [] }],
-              "Should send commands to the recent client");
-
-    let oldPayload = JSON.parse(JSON.parse(collection.payload(oldID)).ciphertext);
-    deepEqual(oldPayload.commands, [{ command: "logout", args: [] }],
-              "Should send commands to the week-old client");
-
-    let dupePayload = JSON.parse(JSON.parse(collection.payload(dupeID)).ciphertext);
-    deepEqual(dupePayload.commands, [],
-              "Should not send commands to the dupe client");
-
-    _("Update the dupe client's modified time");
-    server.insertWBO("foo", "clients", new ServerWBO(dupeID, encryptPayload({
-      id: dupeID,
-      name: engine.localName,
-      type: "desktop",
-      commands: [],
-      version: "48",
-      protocols: ["1.5"],
-    }), now - 10));
-
-    _("Second sync.");
-    engine._sync();
-
-    deepEqual(Object.keys(store.getAllIDs()).sort(),
-              [recentID, oldID, dupeID, engine.localID].sort(),
-              "Stale client synced, so it should no longer be marked as a dupe");
-
-    ok(engine.remoteClientExists(dupeID), "Dupe ID should appear as it synced.");
-
-    // Recently synced dupe desktop should appear in .deviceTypes.
-    equal(engine.deviceTypes.get("desktop"), 3);
-
-    // Recently synced dupe desktop should now appear in stats
-    deepEqual(engine.stats, {
-      hasMobile: 1,
-      names: [engine.localName, "My Phone", engine.localName, "My old desktop"],
-      numClients: 4,
-    });
-
-    ok(engine.remoteClientExists(dupeID), "recently synced dupe ID should now exist");
-    equal(engine.remoteClients.length, 3, "recently synced dupe should now be in remoteClients");
-
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
+  do_check_false(engine.processIncomingCommands());
 });
 
 add_test(function test_command_sync() {
@@ -693,58 +454,40 @@ add_test(function test_command_sync() {
   }
 
   _("Create remote client record");
-  server.insertWBO("foo", "clients", new ServerWBO(remoteId, encryptPayload({
-    id: remoteId,
-    name: "Remote client",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), Date.now() / 1000));
+  let rec = new ClientsRec("clients", remoteId);
+  engine._store.create(rec);
+  let remoteRecord = engine._store.createRecord(remoteId, "clients");
+  engine.sendCommand("wipeAll", []);
+
+  let clientRecord = engine._store._remoteClients[remoteId];
+  do_check_neq(clientRecord, undefined);
+  do_check_eq(clientRecord.commands.length, 1);
 
   try {
     _("Syncing.");
     engine._sync();
-
-    _("Checking remote record was downloaded.");
-    let clientRecord = engine._store._remoteClients[remoteId];
-    notEqual(clientRecord, undefined);
-    equal(clientRecord.commands.length, 0);
-
-    _("Send a command to the remote client.");
-    engine.sendCommand("wipeAll", []);
-    let clientCommands = engine._readCommands()[remoteId];
-    equal(clientCommands.length, 1);
-    engine._sync();
-
     _("Checking record was uploaded.");
-    notEqual(clientWBO(engine.localID).payload, undefined);
-    ok(engine.lastRecordUpload > 0);
+    do_check_neq(clientWBO(engine.localID).payload, undefined);
+    do_check_true(engine.lastRecordUpload > 0);
 
-    notEqual(clientWBO(remoteId).payload, undefined);
+    do_check_neq(clientWBO(remoteId).payload, undefined);
 
     Svc.Prefs.set("client.GUID", remoteId);
     engine._resetClient();
-    equal(engine.localID, remoteId);
+    do_check_eq(engine.localID, remoteId);
     _("Performing sync on resetted client.");
     engine._sync();
-    notEqual(engine.localCommands, undefined);
-    equal(engine.localCommands.length, 1);
+    do_check_neq(engine.localCommands, undefined);
+    do_check_eq(engine.localCommands.length, 1);
 
     let command = engine.localCommands[0];
-    equal(command.command, "wipeAll");
-    equal(command.args.length, 0);
+    do_check_eq(command.command, "wipeAll");
+    do_check_eq(command.args.length, 0);
 
   } finally {
     Svc.Prefs.resetBranch("");
     Service.recordManager.clearCache();
-
-    try {
-      let collection = server.getCollection("foo", "clients");
-      collection.remove(remoteId);
-    } finally {
-      server.stop(run_next_test);
-    }
+    server.stop(run_next_test);
   }
 });
 
@@ -769,19 +512,18 @@ add_test(function test_send_uri_to_client_for_display() {
 
   let newRecord = store._remoteClients[remoteId];
 
-  notEqual(newRecord, undefined);
-  let clientCommands = engine._readCommands()[remoteId];
-  equal(clientCommands.length, 1);
+  do_check_neq(newRecord, undefined);
+  do_check_eq(newRecord.commands.length, 1);
 
-  let command = clientCommands[0];
-  equal(command.command, "displayURI");
-  equal(command.args.length, 3);
-  equal(command.args[0], uri);
-  equal(command.args[1], engine.localID);
-  equal(command.args[2], title);
+  let command = newRecord.commands[0];
+  do_check_eq(command.command, "displayURI");
+  do_check_eq(command.args.length, 3);
+  do_check_eq(command.args[0], uri);
+  do_check_eq(command.args[1], engine.localID);
+  do_check_eq(command.args[2], title);
 
-  ok(tracker.score > initialScore);
-  ok(tracker.score - initialScore >= SCORE_INCREMENT_XLARGE);
+  do_check_true(tracker.score > initialScore);
+  do_check_true(tracker.score - initialScore >= SCORE_INCREMENT_XLARGE);
 
   _("Ensure unknown client IDs result in exception.");
   let unknownId = Utils.makeGUID();
@@ -793,11 +535,7 @@ add_test(function test_send_uri_to_client_for_display() {
     error = ex;
   }
 
-  equal(error.message.indexOf("Unknown remote client ID: "), 0);
-
-  Svc.Prefs.resetBranch("");
-  Service.recordManager.clearCache();
-  engine._resetClient();
+  do_check_eq(error.message.indexOf("Unknown remote client ID: "), 0);
 
   run_next_test();
 });
@@ -821,26 +559,22 @@ add_test(function test_receive_display_uri() {
 
   // Received 'displayURI' command should result in the topic defined below
   // being called.
-  let ev = "weave:engine:clients:display-uris";
+  let ev = "weave:engine:clients:display-uri";
 
   let handler = function(subject, data) {
     Svc.Obs.remove(ev, handler);
 
-    equal(subject[0].uri, uri);
-    equal(subject[0].clientId, remoteId);
-    equal(subject[0].title, title);
-    equal(data, null);
+    do_check_eq(subject.uri, uri);
+    do_check_eq(subject.client, remoteId);
+    do_check_eq(subject.title, title);
+    do_check_eq(data, null);
 
     run_next_test();
   };
 
   Svc.Obs.add(ev, handler);
 
-  ok(engine.processIncomingCommands());
-
-  Svc.Prefs.resetBranch("");
-  Service.recordManager.clearCache();
-  engine._resetClient();
+  do_check_true(engine.processIncomingCommands());
 });
 
 add_test(function test_optional_client_fields() {
@@ -848,590 +582,27 @@ add_test(function test_optional_client_fields() {
 
   const SUPPORTED_PROTOCOL_VERSIONS = ["1.1", "1.5"];
   let local = engine._store.createRecord(engine.localID, "clients");
-  equal(local.name, engine.localName);
-  equal(local.type, engine.localType);
-  equal(local.version, Services.appinfo.version);
-  deepEqual(local.protocols, SUPPORTED_PROTOCOL_VERSIONS);
+  do_check_eq(local.name, engine.localName);
+  do_check_eq(local.type, engine.localType);
+  do_check_eq(local.version, Services.appinfo.version);
+  do_check_array_eq(local.protocols, SUPPORTED_PROTOCOL_VERSIONS);
 
   // Optional fields.
   // Make sure they're what they ought to be...
-  equal(local.os, Services.appinfo.OS);
-  equal(local.appPackage, Services.appinfo.ID);
+  do_check_eq(local.os, Services.appinfo.OS);
+  do_check_eq(local.appPackage, Services.appinfo.ID);
 
   // ... and also that they're non-empty.
-  ok(!!local.os);
-  ok(!!local.appPackage);
-  ok(!!local.application);
+  do_check_true(!!local.os);
+  do_check_true(!!local.appPackage);
+  do_check_true(!!local.application);
 
   // We don't currently populate device or formfactor.
   // See Bug 1100722, Bug 1100723.
 
-  engine._resetClient();
   run_next_test();
 });
 
-add_test(function test_merge_commands() {
-  _("Verifies local commands for remote clients are merged with the server's");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let desktopID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(desktopID, encryptPayload({
-    id: desktopID,
-    name: "Desktop client",
-    type: "desktop",
-    commands: [{
-      command: "displayURI",
-      args: ["https://example.com", engine.localID, "Yak Herders Anonymous"],
-    }],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  let mobileID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(mobileID, encryptPayload({
-    id: mobileID,
-    name: "Mobile client",
-    type: "mobile",
-    commands: [{
-      command: "logout",
-      args: [],
-    }],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. 2 records downloaded.");
-    strictEqual(engine.lastRecordUpload, 0);
-    engine._sync();
-
-    _("Broadcast logout to all clients");
-    engine.sendCommand("logout", []);
-    engine._sync();
-
-    let collection = server.getCollection("foo", "clients");
-    let desktopPayload = JSON.parse(JSON.parse(collection.payload(desktopID)).ciphertext);
-    deepEqual(desktopPayload.commands, [{
-      command: "displayURI",
-      args: ["https://example.com", engine.localID, "Yak Herders Anonymous"],
-    }, {
-      command: "logout",
-      args: [],
-    }], "Should send the logout command to the desktop client");
-
-    let mobilePayload = JSON.parse(JSON.parse(collection.payload(mobileID)).ciphertext);
-    deepEqual(mobilePayload.commands, [{ command: "logout", args: [] }],
-      "Should not send a duplicate logout to the mobile client");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_duplicate_remote_commands() {
-  _("Verifies local commands for remote clients are sent only once (bug 1289287)");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let desktopID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(desktopID, encryptPayload({
-    id: desktopID,
-    name: "Desktop client",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. 1 record downloaded.");
-    strictEqual(engine.lastRecordUpload, 0);
-    engine._sync();
-
-    _("Send tab to client");
-    engine.sendCommand("displayURI", ["https://example.com", engine.localID, "Yak Herders Anonymous"]);
-    engine._sync();
-
-    _("Simulate the desktop client consuming the command and syncing to the server");
-    server.insertWBO("foo", "clients", new ServerWBO(desktopID, encryptPayload({
-      id: desktopID,
-      name: "Desktop client",
-      type: "desktop",
-      commands: [],
-      version: "48",
-      protocols: ["1.5"],
-    }), now - 10));
-
-    _("Send another tab to the desktop client");
-    engine.sendCommand("displayURI", ["https://foobar.com", engine.localID, "Foo bar!"], desktopID);
-    engine._sync();
-
-    let collection = server.getCollection("foo", "clients");
-    let desktopPayload = JSON.parse(JSON.parse(collection.payload(desktopID)).ciphertext);
-    deepEqual(desktopPayload.commands, [{
-      command: "displayURI",
-      args: ["https://foobar.com", engine.localID, "Foo bar!"],
-    }], "Should only send the second command to the desktop client");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_upload_after_reboot() {
-  _("Multiple downloads, reboot, then upload (bug 1289287)");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let deviceBID = Utils.makeGUID();
-  let deviceCID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(deviceBID, encryptPayload({
-    id: deviceBID,
-    name: "Device B",
-    type: "desktop",
-    commands: [{
-      command: "displayURI", args: ["https://deviceclink.com", deviceCID, "Device C link"]
-    }],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-  server.insertWBO("foo", "clients", new ServerWBO(deviceCID, encryptPayload({
-    id: deviceCID,
-    name: "Device C",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. 2 records downloaded.");
-    strictEqual(engine.lastRecordUpload, 0);
-    engine._sync();
-
-    _("Send tab to client");
-    engine.sendCommand("displayURI", ["https://example.com", engine.localID, "Yak Herders Anonymous"], deviceBID);
-
-    const oldUploadOutgoing = SyncEngine.prototype._uploadOutgoing;
-    SyncEngine.prototype._uploadOutgoing = () => engine._onRecordsWritten.call(engine, [], [deviceBID]);
-    engine._sync();
-
-    let collection = server.getCollection("foo", "clients");
-    let deviceBPayload = JSON.parse(JSON.parse(collection.payload(deviceBID)).ciphertext);
-    deepEqual(deviceBPayload.commands, [{
-      command: "displayURI", args: ["https://deviceclink.com", deviceCID, "Device C link"]
-    }], "Should be the same because the upload failed");
-
-    _("Simulate the client B consuming the command and syncing to the server");
-    server.insertWBO("foo", "clients", new ServerWBO(deviceBID, encryptPayload({
-      id: deviceBID,
-      name: "Device B",
-      type: "desktop",
-      commands: [],
-      version: "48",
-      protocols: ["1.5"],
-    }), now - 10));
-
-    // Simulate reboot
-    SyncEngine.prototype._uploadOutgoing = oldUploadOutgoing;
-    engine = Service.clientsEngine = new ClientEngine(Service);
-
-    engine._sync();
-
-    deviceBPayload = JSON.parse(JSON.parse(collection.payload(deviceBID)).ciphertext);
-    deepEqual(deviceBPayload.commands, [{
-      command: "displayURI",
-      args: ["https://example.com", engine.localID, "Yak Herders Anonymous"],
-    }], "Should only had written our outgoing command");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_keep_cleared_commands_after_reboot() {
-  _("Download commands, fail upload, reboot, then apply new commands (bug 1289287)");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let deviceBID = Utils.makeGUID();
-  let deviceCID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(engine.localID, encryptPayload({
-    id: engine.localID,
-    name: "Device A",
-    type: "desktop",
-    commands: [{
-      command: "displayURI", args: ["https://deviceblink.com", deviceBID, "Device B link"]
-    },
-    {
-      command: "displayURI", args: ["https://deviceclink.com", deviceCID, "Device C link"]
-    }],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-  server.insertWBO("foo", "clients", new ServerWBO(deviceBID, encryptPayload({
-    id: deviceBID,
-    name: "Device B",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-  server.insertWBO("foo", "clients", new ServerWBO(deviceCID, encryptPayload({
-    id: deviceCID,
-    name: "Device C",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. Download remote and our record.");
-    strictEqual(engine.lastRecordUpload, 0);
-
-    let collection = server.getCollection("foo", "clients");
-    const oldUploadOutgoing = SyncEngine.prototype._uploadOutgoing;
-    SyncEngine.prototype._uploadOutgoing = () => engine._onRecordsWritten.call(engine, [], [deviceBID]);
-    let commandsProcessed = 0;
-    engine._handleDisplayURIs = (uris) => { commandsProcessed = uris.length };
-
-    engine._sync();
-    engine.processIncomingCommands(); // Not called by the engine.sync(), gotta call it ourselves
-    equal(commandsProcessed, 2, "We processed 2 commands");
-
-    let localRemoteRecord = JSON.parse(JSON.parse(collection.payload(engine.localID)).ciphertext);
-    deepEqual(localRemoteRecord.commands, [{
-      command: "displayURI", args: ["https://deviceblink.com", deviceBID, "Device B link"]
-    },
-    {
-      command: "displayURI", args: ["https://deviceclink.com", deviceCID, "Device C link"]
-    }], "Should be the same because the upload failed");
-
-    // Another client sends another link
-    server.insertWBO("foo", "clients", new ServerWBO(engine.localID, encryptPayload({
-      id: engine.localID,
-      name: "Device A",
-      type: "desktop",
-      commands: [{
-        command: "displayURI", args: ["https://deviceblink.com", deviceBID, "Device B link"]
-      },
-      {
-        command: "displayURI", args: ["https://deviceclink.com", deviceCID, "Device C link"]
-      },
-      {
-        command: "displayURI", args: ["https://deviceclink2.com", deviceCID, "Device C link 2"]
-      }],
-      version: "48",
-      protocols: ["1.5"],
-    }), now - 10));
-
-    // Simulate reboot
-    SyncEngine.prototype._uploadOutgoing = oldUploadOutgoing;
-    engine = Service.clientsEngine = new ClientEngine(Service);
-
-    commandsProcessed = 0;
-    engine._handleDisplayURIs = (uris) => { commandsProcessed = uris.length };
-    engine._sync();
-    engine.processIncomingCommands();
-    equal(commandsProcessed, 1, "We processed one command (the other were cleared)");
-
-    localRemoteRecord = JSON.parse(JSON.parse(collection.payload(deviceBID)).ciphertext);
-    deepEqual(localRemoteRecord.commands, [], "Should be empty");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-
-    // Reset service (remove mocks)
-    engine = Service.clientsEngine = new ClientEngine(Service);
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_deleted_commands() {
-  _("Verifies commands for a deleted client are discarded");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  let activeID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(activeID, encryptPayload({
-    id: activeID,
-    name: "Active client",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  let deletedID = Utils.makeGUID();
-  server.insertWBO("foo", "clients", new ServerWBO(deletedID, encryptPayload({
-    id: deletedID,
-    name: "Client to delete",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"],
-  }), now - 10));
-
-  try {
-    let store = engine._store;
-
-    _("First sync. 2 records downloaded.");
-    engine._sync();
-
-    _("Delete a record on the server.");
-    let collection = server.getCollection("foo", "clients");
-    collection.remove(deletedID);
-
-    _("Broadcast a command to all clients");
-    engine.sendCommand("logout", []);
-    engine._sync();
-
-    deepEqual(collection.keys().sort(), [activeID, engine.localID].sort(),
-      "Should not reupload deleted clients");
-
-    let activePayload = JSON.parse(JSON.parse(collection.payload(activeID)).ciphertext);
-    deepEqual(activePayload.commands, [{ command: "logout", args: [] }],
-      "Should send the command to the active client");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_send_uri_ack() {
-  _("Ensure a sent URI is deleted when the client syncs");
-
-  let now = Date.now() / 1000;
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server = serverForUsers({"foo": "password"}, contents);
-  let user   = server.user("foo");
-
-  new SyncTestingInfrastructure(server.server);
-  generateNewKeys(Service.collectionKeys);
-
-  try {
-    let fakeSenderID = Utils.makeGUID();
-
-    _("Initial sync for empty clients collection");
-    engine._sync();
-    let collection = server.getCollection("foo", "clients");
-    let ourPayload = JSON.parse(JSON.parse(collection.payload(engine.localID)).ciphertext);
-    ok(ourPayload, "Should upload our client record");
-
-    _("Send a URL to the device on the server");
-    ourPayload.commands = [{
-      command: "displayURI",
-      args: ["https://example.com", fakeSenderID, "Yak Herders Anonymous"],
-    }];
-    server.insertWBO("foo", "clients", new ServerWBO(engine.localID, encryptPayload(ourPayload), now));
-
-    _("Sync again");
-    engine._sync();
-    deepEqual(engine.localCommands, [{
-      command: "displayURI",
-      args: ["https://example.com", fakeSenderID, "Yak Herders Anonymous"],
-    }], "Should receive incoming URI");
-    ok(engine.processIncomingCommands(), "Should process incoming commands");
-    const clearedCommands = engine._readCommands()[engine.localID];
-    deepEqual(clearedCommands, [{
-      command: "displayURI",
-      args: ["https://example.com", fakeSenderID, "Yak Herders Anonymous"],
-    }], "Should mark the commands as cleared after processing");
-
-    _("Check that the command was removed on the server");
-    engine._sync();
-    ourPayload = JSON.parse(JSON.parse(collection.payload(engine.localID)).ciphertext);
-    ok(ourPayload, "Should upload the synced client record");
-    deepEqual(ourPayload.commands, [], "Should not reupload cleared commands");
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-    engine._resetClient();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
-add_test(function test_command_sync() {
-  _("Notify other clients when writing their record.");
-
-  engine._store.wipe();
-  generateNewKeys(Service.collectionKeys);
-
-  let contents = {
-    meta: {global: {engines: {clients: {version: engine.version,
-                                        syncID: engine.syncID}}}},
-    clients: {},
-    crypto: {}
-  };
-  let server    = serverForUsers({"foo": "password"}, contents);
-  new SyncTestingInfrastructure(server.server);
-
-  let user       = server.user("foo");
-  let collection = server.getCollection("foo", "clients");
-  let remoteId   = Utils.makeGUID();
-  let remoteId2  = Utils.makeGUID();
-
-  function clientWBO(id) {
-    return user.collection("clients").wbo(id);
-  }
-
-  _("Create remote client record 1");
-  server.insertWBO("foo", "clients", new ServerWBO(remoteId, encryptPayload({
-    id: remoteId,
-    name: "Remote client",
-    type: "desktop",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"]
-  }), Date.now() / 1000));
-
-  _("Create remote client record 2");
-  server.insertWBO("foo", "clients", new ServerWBO(remoteId2, encryptPayload({
-    id: remoteId2,
-    name: "Remote client 2",
-    type: "mobile",
-    commands: [],
-    version: "48",
-    protocols: ["1.5"]
-  }), Date.now() / 1000));
-
-  try {
-    equal(collection.count(), 2, "2 remote records written");
-    engine._sync();
-    equal(collection.count(), 3, "3 remote records written (+1 for the synced local record)");
-
-    let notifiedIds;
-    engine.sendCommand("wipeAll", []);
-    engine._tracker.addChangedID(engine.localID);
-    engine.getClientFxaDeviceId = (id) => "fxa-" + id;
-    engine._notifyCollectionChanged = (ids) => (notifiedIds = ids);
-    _("Syncing.");
-    engine._sync();
-    deepEqual(notifiedIds, ["fxa-fake-guid-00","fxa-fake-guid-01"]);
-    ok(!notifiedIds.includes(engine.getClientFxaDeviceId(engine.localID)),
-      "We never notify the local device");
-
-  } finally {
-    Svc.Prefs.resetBranch("");
-    Service.recordManager.clearCache();
-
-    try {
-      server.deleteCollections("foo");
-    } finally {
-      server.stop(run_next_test);
-    }
-  }
-});
-
 function run_test() {
   initTestLogging("Trace");
   Log.repository.getLogger("Sync.Engine.Clients").level = Log.Level.Trace;
diff --git a/services/sync/tests/unit/test_collection_getBatched.js b/services/sync/tests/unit/test_collection_getBatched.js
deleted file mode 100644
index c6523d497..000000000
--- a/services/sync/tests/unit/test_collection_getBatched.js
+++ /dev/null
@@ -1,195 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/record.js");
-Cu.import("resource://services-sync/service.js");
-
-function run_test() {
-  initTestLogging("Trace");
-  Log.repository.getLogger("Sync.Collection").level = Log.Level.Trace;
-  run_next_test();
-}
-
-function recordRange(lim, offset, total) {
-  let res = [];
-  for (let i = offset; i < Math.min(lim + offset, total); ++i) {
-    res.push(JSON.stringify({ id: String(i), payload: "test:" + i }));
-  }
-  return res.join("\n") + "\n";
-}
-
-function get_test_collection_info({ totalRecords, batchSize, lastModified,
-                                    throwAfter = Infinity,
-                                    interruptedAfter = Infinity }) {
-  let coll = new Collection("http://example.com/test/", WBORecord, Service);
-  coll.full = true;
-  let requests = [];
-  let responses = [];
-  let sawRecord = false;
-  coll.get = function() {
-    ok(!sawRecord); // make sure we call record handler after all requests.
-    let limit = +this.limit;
-    let offset = 0;
-    if (this.offset) {
-      equal(this.offset.slice(0, 6), "foobar");
-      offset = +this.offset.slice(6);
-    }
-    requests.push({
-      limit,
-      offset,
-      spec: this.spec,
-      headers: Object.assign({}, this.headers)
-    });
-    if (--throwAfter === 0) {
-      throw "Some Network Error";
-    }
-    let body = recordRange(limit, offset, totalRecords);
-    this._onProgress.call({ _data: body });
-    let response = {
-      body,
-      success: true,
-      status: 200,
-      headers: {}
-    };
-    if (--interruptedAfter === 0) {
-      response.success = false;
-      response.status = 412;
-      response.body = "";
-    } else if (offset + limit < totalRecords) {
-      // Ensure we're treating this as an opaque string, since the docs say
-      // it might not be numeric.
-      response.headers["x-weave-next-offset"] = "foobar" + (offset + batchSize);
-    }
-    response.headers["x-last-modified"] = lastModified;
-    responses.push(response);
-    return response;
-  };
-
-  let records = [];
-  coll.recordHandler = function(record) {
-    sawRecord = true;
-    // ensure records are coming in in the right order
-    equal(record.id, String(records.length));
-    equal(record.payload, "test:" + records.length);
-    records.push(record);
-  };
-  return { records, responses, requests, coll };
-}
-
-add_test(function test_success() {
-  const totalRecords = 11;
-  const batchSize = 2;
-  const lastModified = "111111";
-  let { records, responses, requests, coll } = get_test_collection_info({
-    totalRecords,
-    batchSize,
-    lastModified,
-  });
-  let response = coll.getBatched(batchSize);
-
-  equal(requests.length, Math.ceil(totalRecords / batchSize));
-
-  // records are mostly checked in recordHandler, we just care about the length
-  equal(records.length, totalRecords);
-
-  // ensure we're returning the last response
-  equal(responses[responses.length - 1], response);
-
-  // check first separately since its a bit of a special case
-  ok(!requests[0].headers["x-if-unmodified-since"]);
-  ok(!requests[0].offset);
-  equal(requests[0].limit, batchSize);
-  let expectedOffset = 2;
-  for (let i = 1; i < requests.length; ++i) {
-    let req = requests[i];
-    equal(req.headers["x-if-unmodified-since"], lastModified);
-    equal(req.limit, batchSize);
-    if (i !== requests.length - 1) {
-      equal(req.offset, expectedOffset);
-    }
-
-    expectedOffset += batchSize;
-  }
-
-  // ensure we cleaned up anything that would break further
-  // use of this collection.
-  ok(!coll._headers["x-if-unmodified-since"]);
-  ok(!coll.offset);
-  ok(!coll.limit || (coll.limit == Infinity));
-
-  run_next_test();
-});
-
-add_test(function test_total_limit() {
-  _("getBatched respects the (initial) value of the limit property");
-  const totalRecords = 100;
-  const recordLimit = 11;
-  const batchSize = 2;
-  const lastModified = "111111";
-  let { records, responses, requests, coll } = get_test_collection_info({
-    totalRecords,
-    batchSize,
-    lastModified,
-  });
-  coll.limit = recordLimit;
-  let response = coll.getBatched(batchSize);
-
-  equal(requests.length, Math.ceil(recordLimit / batchSize));
-  equal(records.length, recordLimit);
-
-  for (let i = 0; i < requests.length; ++i) {
-    let req = requests[i];
-    if (i !== requests.length - 1) {
-      equal(req.limit, batchSize);
-    } else {
-      equal(req.limit, recordLimit % batchSize);
-    }
-  }
-
-  equal(coll._limit, recordLimit);
-
-  run_next_test();
-});
-
-add_test(function test_412() {
-  _("We shouldn't record records if we get a 412 in the middle of a batch");
-  const totalRecords = 11;
-  const batchSize = 2;
-  const lastModified = "111111";
-  let { records, responses, requests, coll } = get_test_collection_info({
-    totalRecords,
-    batchSize,
-    lastModified,
-    interruptedAfter: 3
-  });
-  let response = coll.getBatched(batchSize);
-
-  equal(requests.length, 3);
-  equal(records.length, 0); // record handler shouldn't be called for anything
-
-  // ensure we're returning the last response
-  equal(responses[responses.length - 1], response);
-
-  ok(!response.success);
-  equal(response.status, 412);
-  run_next_test();
-});
-
-add_test(function test_get_throws() {
-  _("We shouldn't record records if get() throws for some reason");
-  const totalRecords = 11;
-  const batchSize = 2;
-  const lastModified = "111111";
-  let { records, responses, requests, coll } = get_test_collection_info({
-    totalRecords,
-    batchSize,
-    lastModified,
-    throwAfter: 3
-  });
-
-  throws(() => coll.getBatched(batchSize), "Some Network Error");
-
-  equal(requests.length, 3);
-  equal(records.length, 0);
-  run_next_test();
-});
diff --git a/services/sync/tests/unit/test_collections_recovery.js b/services/sync/tests/unit/test_collections_recovery.js
index 0e7f54676..377a05383 100644
--- a/services/sync/tests/unit/test_collections_recovery.js
+++ b/services/sync/tests/unit/test_collections_recovery.js
@@ -6,7 +6,7 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-add_identity_test(this, function* test_missing_crypto_collection() {
+add_identity_test(this, function test_missing_crypto_collection() {
   let johnHelper = track_collections_helper();
   let johnU      = johnHelper.with_updated_collection;
   let johnColls  = johnHelper.collections;
@@ -33,10 +33,7 @@ add_identity_test(this, function* test_missing_crypto_collection() {
   };
   let collections = ["clients", "bookmarks", "forms", "history",
                      "passwords", "prefs", "tabs"];
-  // Disable addon sync because AddonManager won't be initialized here.
-  Service.engineManager.unregister("addons");
-
-  for (let coll of collections) {
+  for each (let coll in collections) {
     handlers["/1.1/johndoe/storage/" + coll] =
       johnU(coll, new ServerCollection({}, true).handler());
   }
@@ -53,7 +50,7 @@ add_identity_test(this, function* test_missing_crypto_collection() {
     };
 
     _("Startup, no meta/global: freshStart called once.");
-    yield sync_and_validate_telem();
+    Service.sync();
     do_check_eq(fresh, 1);
     fresh = 0;
 
@@ -63,12 +60,12 @@ add_identity_test(this, function* test_missing_crypto_collection() {
 
     _("Simulate a bad info/collections.");
     delete johnColls.crypto;
-    yield sync_and_validate_telem();
+    Service.sync();
     do_check_eq(fresh, 1);
     fresh = 0;
 
     _("Regular sync: no need to freshStart.");
-    yield sync_and_validate_telem();
+    Service.sync();
     do_check_eq(fresh, 0);
 
   } finally {
diff --git a/services/sync/tests/unit/test_corrupt_keys.js b/services/sync/tests/unit/test_corrupt_keys.js
index 009461c2a..2db080a8f 100644
--- a/services/sync/tests/unit/test_corrupt_keys.js
+++ b/services/sync/tests/unit/test_corrupt_keys.js
@@ -14,7 +14,7 @@ Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 Cu.import("resource://gre/modules/Promise.jsm");
 
-add_task(function* test_locally_changed_keys() {
+add_task(function test_locally_changed_keys() {
   let passphrase = "abcdeabcdeabcdeabcdeabcdea";
 
   let hmacErrorCount = 0;
@@ -51,7 +51,7 @@ add_task(function* test_locally_changed_keys() {
                           }]}]};
     delete Svc.Session;
     Svc.Session = {
-      getBrowserState: () => JSON.stringify(myTabs)
+      getBrowserState: function () JSON.stringify(myTabs)
     };
 
     setBasicCredentials("johndoe", "password", passphrase);
@@ -59,7 +59,6 @@ add_task(function* test_locally_changed_keys() {
     Service.clusterURL = server.baseURI;
 
     Service.engineManager.register(HistoryEngine);
-    Service.engineManager.unregister("addons");
 
     function corrupt_local_keys() {
       Service.collectionKeys._default.keyPair = [Svc.Crypto.generateRandomKey(),
@@ -87,7 +86,7 @@ add_task(function* test_locally_changed_keys() {
     do_check_true(Service.isLoggedIn);
 
     // Sync should upload records.
-    yield sync_and_validate_telem();
+    Service.sync();
 
     // Tabs exist.
     _("Tabs modified: " + johndoe.modified("tabs"));
@@ -140,9 +139,7 @@ add_task(function* test_locally_changed_keys() {
 
     _("HMAC error count: " + hmacErrorCount);
     // Now syncing should succeed, after one HMAC error.
-    let ping = yield wait_for_ping(() => Service.sync(), true);
-    equal(ping.engines.find(e => e.name == "history").incoming.applied, 5);
-
+    Service.sync();
     do_check_eq(hmacErrorCount, 1);
     _("Keys now: " + Service.collectionKeys.keyForCollection("history").keyPair);
 
@@ -186,9 +183,7 @@ add_task(function* test_locally_changed_keys() {
     Service.lastHMACEvent = 0;
 
     _("Syncing...");
-    ping = yield sync_and_validate_telem(true);
-
-    do_check_eq(ping.engines.find(e => e.name == "history").incoming.failed, 5);
+    Service.sync();
     _("Keys now: " + Service.collectionKeys.keyForCollection("history").keyPair);
     _("Server keys have been updated, and we skipped over 5 more HMAC errors without adjusting history.");
     do_check_true(johndoe.modified("crypto") > old_key_time);
@@ -209,7 +204,6 @@ add_task(function* test_locally_changed_keys() {
 function run_test() {
   let logger = Log.repository.rootLogger;
   Log.repository.rootLogger.addAppender(new Log.DumpAppender());
-  validate_all_future_pings();
 
   ensureLegacyIdentityManager();
 
diff --git a/services/sync/tests/unit/test_engine.js b/services/sync/tests/unit/test_engine.js
index be637efc8..000cd5b4a 100644
--- a/services/sync/tests/unit/test_engine.js
+++ b/services/sync/tests/unit/test_engine.js
@@ -25,8 +25,8 @@ SteamTracker.prototype = {
   __proto__: Tracker.prototype
 };
 
-function SteamEngine(name, service) {
-  Engine.call(this, name, service);
+function SteamEngine(service) {
+  Engine.call(this, "Steam", service);
   this.wasReset = false;
   this.wasSynced = false;
 }
@@ -44,7 +44,7 @@ SteamEngine.prototype = {
   }
 };
 
-var engineObserver = {
+let engineObserver = {
   topics: [],
 
   observe: function(subject, topic, data) {
@@ -69,7 +69,7 @@ function run_test() {
 
 add_test(function test_members() {
   _("Engine object members");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   do_check_eq(engine.Name, "Steam");
   do_check_eq(engine.prefName, "steam");
   do_check_true(engine._store instanceof SteamStore);
@@ -79,7 +79,7 @@ add_test(function test_members() {
 
 add_test(function test_score() {
   _("Engine.score corresponds to tracker.score and is readonly");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   do_check_eq(engine.score, 0);
   engine._tracker.score += 5;
   do_check_eq(engine.score, 5);
@@ -97,7 +97,7 @@ add_test(function test_score() {
 
 add_test(function test_resetClient() {
   _("Engine.resetClient calls _resetClient");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   do_check_false(engine.wasReset);
 
   engine.resetClient();
@@ -112,7 +112,7 @@ add_test(function test_resetClient() {
 
 add_test(function test_invalidChangedIDs() {
   _("Test that invalid changed IDs on disk don't end up live.");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   let tracker = engine._tracker;
   tracker.changedIDs = 5;
   tracker.saveChangedIDs(function onSaved() {
@@ -127,7 +127,7 @@ add_test(function test_invalidChangedIDs() {
 
 add_test(function test_wipeClient() {
   _("Engine.wipeClient calls resetClient, wipes store, clears changed IDs");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   do_check_false(engine.wasReset);
   do_check_false(engine._store.wasWiped);
   do_check_true(engine._tracker.addChangedID("a-changed-id"));
@@ -150,7 +150,7 @@ add_test(function test_wipeClient() {
 
 add_test(function test_enabled() {
   _("Engine.enabled corresponds to preference");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   try {
     do_check_false(engine.enabled);
     Svc.Prefs.set("engine.steam", true);
@@ -165,18 +165,16 @@ add_test(function test_enabled() {
 });
 
 add_test(function test_sync() {
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   try {
     _("Engine.sync doesn't call _sync if it's not enabled");
     do_check_false(engine.enabled);
     do_check_false(engine.wasSynced);
     engine.sync();
-
     do_check_false(engine.wasSynced);
 
     _("Engine.sync calls _sync if it's enabled");
     engine.enabled = true;
-
     engine.sync();
     do_check_true(engine.wasSynced);
     do_check_eq(engineObserver.topics[0], "weave:engine:sync:start");
@@ -191,7 +189,7 @@ add_test(function test_sync() {
 
 add_test(function test_disabled_no_track() {
   _("When an engine is disabled, its tracker is not tracking.");
-  let engine = new SteamEngine("Steam", Service);
+  let engine = new SteamEngine(Service);
   let tracker = engine._tracker;
   do_check_eq(engine, tracker.engine);
 
diff --git a/services/sync/tests/unit/test_errorhandler.js b/services/sync/tests/unit/test_errorhandler.js
new file mode 100644
index 000000000..c087acc9f
--- /dev/null
+++ b/services/sync/tests/unit/test_errorhandler.js
@@ -0,0 +1,1893 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource://services-sync/engines/clients.js");
+Cu.import("resource://services-sync/constants.js");
+Cu.import("resource://services-sync/engines.js");
+Cu.import("resource://services-sync/keys.js");
+Cu.import("resource://services-sync/policies.js");
+Cu.import("resource://services-sync/service.js");
+Cu.import("resource://services-sync/status.js");
+Cu.import("resource://services-sync/util.js");
+Cu.import("resource://testing-common/services/sync/utils.js");
+Cu.import("resource://gre/modules/FileUtils.jsm");
+
+const FAKE_SERVER_URL = "http://dummy:9000/";
+const logsdir = FileUtils.getDir("ProfD", ["weave", "logs"], true);
+
+const PROLONGED_ERROR_DURATION =
+  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') * 2) * 1000;
+
+const NON_PROLONGED_ERROR_DURATION =
+  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') / 2) * 1000;
+
+Service.engineManager.clear();
+
+function setLastSync(lastSyncValue) {
+  Svc.Prefs.set("lastSync", (new Date(Date.now() - lastSyncValue)).toString());
+}
+
+function CatapultEngine() {
+  SyncEngine.call(this, "Catapult", Service);
+}
+CatapultEngine.prototype = {
+  __proto__: SyncEngine.prototype,
+  exception: null, // tests fill this in
+  _sync: function _sync() {
+    if (this.exception) {
+      throw this.exception;
+    }
+  }
+};
+
+let engineManager = Service.engineManager;
+engineManager.register(CatapultEngine);
+
+// This relies on Service/ErrorHandler being a singleton. Fixing this will take
+// a lot of work.
+let errorHandler = Service.errorHandler;
+
+function run_test() {
+  initTestLogging("Trace");
+
+  Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
+  Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
+  Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
+
+  ensureLegacyIdentityManager();
+
+  run_next_test();
+}
+
+function generateCredentialsChangedFailure() {
+  // Make sync fail due to changed credentials. We simply re-encrypt
+  // the keys with a different Sync Key, without changing the local one.
+  let newSyncKeyBundle = new SyncKeyBundle("johndoe", "23456234562345623456234562");
+  let keys = Service.collectionKeys.asWBO();
+  keys.encrypt(newSyncKeyBundle);
+  keys.upload(Service.resource(Service.cryptoKeysURL));
+}
+
+function service_unavailable(request, response) {
+  let body = "Service Unavailable";
+  response.setStatusLine(request.httpVersion, 503, "Service Unavailable");
+  response.setHeader("Retry-After", "42");
+  response.bodyOutputStream.write(body, body.length);
+}
+
+function sync_httpd_setup() {
+  let global = new ServerWBO("global", {
+    syncID: Service.syncID,
+    storageVersion: STORAGE_VERSION,
+    engines: {clients: {version: Service.clientsEngine.version,
+                        syncID: Service.clientsEngine.syncID},
+              catapult: {version: engineManager.get("catapult").version,
+                         syncID: engineManager.get("catapult").syncID}}
+  });
+  let clientsColl = new ServerCollection({}, true);
+
+  // Tracking info/collections.
+  let collectionsHelper = track_collections_helper();
+  let upd = collectionsHelper.with_updated_collection;
+
+  let handler_401 = httpd_handler(401, "Unauthorized");
+  return httpd_setup({
+    // Normal server behaviour.
+    "/1.1/johndoe/storage/meta/global": upd("meta", global.handler()),
+    "/1.1/johndoe/info/collections": collectionsHelper.handler,
+    "/1.1/johndoe/storage/crypto/keys":
+      upd("crypto", (new ServerWBO("keys")).handler()),
+    "/1.1/johndoe/storage/clients": upd("clients", clientsColl.handler()),
+
+    // Credentials are wrong or node reallocated.
+    "/1.1/janedoe/storage/meta/global": handler_401,
+    "/1.1/janedoe/info/collections": handler_401,
+
+    // Maintenance or overloaded (503 + Retry-After) at info/collections.
+    "/maintenance/1.1/broken.info/info/collections": service_unavailable,
+
+    // Maintenance or overloaded (503 + Retry-After) at meta/global.
+    "/maintenance/1.1/broken.meta/storage/meta/global": service_unavailable,
+    "/maintenance/1.1/broken.meta/info/collections": collectionsHelper.handler,
+
+    // Maintenance or overloaded (503 + Retry-After) at crypto/keys.
+    "/maintenance/1.1/broken.keys/storage/meta/global": upd("meta", global.handler()),
+    "/maintenance/1.1/broken.keys/info/collections": collectionsHelper.handler,
+    "/maintenance/1.1/broken.keys/storage/crypto/keys": service_unavailable,
+
+    // Maintenance or overloaded (503 + Retry-After) at wiping collection.
+    "/maintenance/1.1/broken.wipe/info/collections": collectionsHelper.handler,
+    "/maintenance/1.1/broken.wipe/storage/meta/global": upd("meta", global.handler()),
+    "/maintenance/1.1/broken.wipe/storage/crypto/keys":
+      upd("crypto", (new ServerWBO("keys")).handler()),
+    "/maintenance/1.1/broken.wipe/storage": service_unavailable,
+    "/maintenance/1.1/broken.wipe/storage/clients": upd("clients", clientsColl.handler()),
+    "/maintenance/1.1/broken.wipe/storage/catapult": service_unavailable
+  });
+}
+
+function setUp(server) {
+  return configureIdentity({username: "johndoe"}).then(
+    () => {
+      Service.serverURL  = server.baseURI + "/";
+      Service.clusterURL = server.baseURI + "/";
+    }
+  ).then(
+    () => generateAndUploadKeys()
+  );
+}
+
+function generateAndUploadKeys() {
+  generateNewKeys(Service.collectionKeys);
+  let serverKeys = Service.collectionKeys.asWBO("crypto", "keys");
+  serverKeys.encrypt(Service.identity.syncKeyBundle);
+  return serverKeys.upload(Service.resource(Service.cryptoKeysURL)).success;
+}
+
+function clean() {
+  Service.startOver();
+  Status.resetSync();
+  Status.resetBackoff();
+  errorHandler.didReportProlongedError = false;
+}
+
+add_identity_test(this, function test_401_logout() {
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:service:sync:error", onSyncError);
+  function onSyncError() {
+    _("Got weave:service:sync:error in first sync.");
+    Svc.Obs.remove("weave:service:sync:error", onSyncError);
+
+    // Wait for the automatic next sync.
+    function onLoginError() {
+      _("Got weave:service:login:error in second sync.");
+      Svc.Obs.remove("weave:service:login:error", onLoginError);
+
+      do_check_eq(Status.login, LOGIN_FAILED_LOGIN_REJECTED);
+      do_check_false(Service.isLoggedIn);
+
+      // Clean up.
+      Utils.nextTick(function () {
+        Service.startOver();
+        server.stop(deferred.resolve);
+      });
+    }
+    Svc.Obs.add("weave:service:login:error", onLoginError);
+  }
+
+  // Make sync fail due to login rejected.
+  yield configureIdentity({username: "janedoe"});
+  Service._updateCachedURLs();
+
+  _("Starting first sync.");
+  Service.sync();
+  _("First sync done.");
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_credentials_changed_logout() {
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  generateCredentialsChangedFailure();
+  Service.sync();
+
+  do_check_eq(Status.sync, CREDENTIALS_CHANGED);
+  do_check_false(Service.isLoggedIn);
+
+  // Clean up.
+  Service.startOver();
+  let deferred = Promise.defer();
+  server.stop(deferred.resolve);
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_no_lastSync_pref() {
+  // Test reported error.
+  Status.resetSync();
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = CREDENTIALS_CHANGED;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test unreported error.
+  Status.resetSync();
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+
+});
+
+add_identity_test(this, function test_shouldReportError() {
+  Status.login = MASTER_PASSWORD_LOCKED;
+  do_check_false(errorHandler.shouldReportError());
+
+  // Give ourselves a clusterURL so that the temporary 401 no-error situation
+  // doesn't come into play.
+  Service.serverURL  = FAKE_SERVER_URL;
+  Service.clusterURL = FAKE_SERVER_URL;
+
+  // Test dontIgnoreErrors, non-network, non-prolonged, login error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = LOGIN_FAILED_NO_PASSWORD;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, non-network, non-prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = CREDENTIALS_CHANGED;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, non-network, prolonged, login error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = LOGIN_FAILED_NO_PASSWORD;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, non-network, prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = CREDENTIALS_CHANGED;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, network, non-prolonged, login error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, network, non-prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, network, prolonged, login error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test dontIgnoreErrors, network, prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+
+  // Test non-network, prolonged, login error reported
+  do_check_false(errorHandler.didReportProlongedError);
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = LOGIN_FAILED_NO_PASSWORD;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+
+  // Second time with prolonged error and without resetting
+  // didReportProlongedError, sync error should not be reported.
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = LOGIN_FAILED_NO_PASSWORD;
+  do_check_false(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+
+  // Test non-network, prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  errorHandler.didReportProlongedError = false;
+  Status.sync = CREDENTIALS_CHANGED;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+  errorHandler.didReportProlongedError = false;
+
+  // Test network, prolonged, login error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+  errorHandler.didReportProlongedError = false;
+
+  // Test network, prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+  errorHandler.didReportProlongedError = false;
+
+  // Test non-network, non-prolonged, login error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = LOGIN_FAILED_NO_PASSWORD;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test non-network, non-prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.sync = CREDENTIALS_CHANGED;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test network, non-prolonged, login error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_false(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test network, non-prolonged, sync error reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
+  do_check_false(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test server maintenance, sync errors are not reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.sync = SERVER_MAINTENANCE;
+  do_check_false(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test server maintenance, login errors are not reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = SERVER_MAINTENANCE;
+  do_check_false(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test prolonged, server maintenance, sync errors are reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.sync = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+  errorHandler.didReportProlongedError = false;
+
+  // Test prolonged, server maintenance, login errors are reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = false;
+  Status.login = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_true(errorHandler.didReportProlongedError);
+  errorHandler.didReportProlongedError = false;
+
+  // Test dontIgnoreErrors, server maintenance, sync errors are reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  // dontIgnoreErrors means we don't set didReportProlongedError
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test dontIgnoreErrors, server maintenance, login errors are reported
+  Status.resetSync();
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test dontIgnoreErrors, prolonged, server maintenance,
+  // sync errors are reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.sync = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+
+  // Test dontIgnoreErrors, prolonged, server maintenance,
+  // login errors are reported
+  Status.resetSync();
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.dontIgnoreErrors = true;
+  Status.login = SERVER_MAINTENANCE;
+  do_check_true(errorHandler.shouldReportError());
+  do_check_false(errorHandler.didReportProlongedError);
+});
+
+add_identity_test(this, function test_shouldReportError_master_password() {
+  _("Test error ignored due to locked master password");
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // Monkey patch Service.verifyLogin to imitate
+  // master password being locked.
+  Service._verifyLogin = Service.verifyLogin;
+  Service.verifyLogin = function () {
+    Status.login = MASTER_PASSWORD_LOCKED;
+    return false;
+  };
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  do_check_false(errorHandler.shouldReportError());
+
+  // Clean up.
+  Service.verifyLogin = Service._verifyLogin;
+  clean();
+  let deferred = Promise.defer();
+  server.stop(deferred.resolve);
+  yield deferred.promise;
+});
+
+// Test that even if we don't have a cluster URL, a login failure due to
+// authentication errors is always reported.
+add_identity_test(this, function test_shouldReportLoginFailureWithNoCluster() {
+  // Ensure no clusterURL - any error not specific to login should not be reported.
+  Service.serverURL  = "";
+  Service.clusterURL = "";
+
+  // Test explicit "login rejected" state.
+  Status.resetSync();
+  // If we have a LOGIN_REJECTED state, we always report the error.
+  Status.login = LOGIN_FAILED_LOGIN_REJECTED;
+  do_check_true(errorHandler.shouldReportError());
+  // But any other status with a missing clusterURL is treated as a mid-sync
+  // 401 (ie, should be treated as a node reassignment)
+  Status.login = LOGIN_SUCCEEDED;
+  do_check_false(errorHandler.shouldReportError());
+});
+
+// XXX - how to arrange for 'Service.identity.basicPassword = null;' in
+// an fxaccounts environment?
+add_task(function test_login_syncAndReportErrors_non_network_error() {
+  // Test non-network errors are reported
+  // when calling syncAndReportErrors
+  let server = sync_httpd_setup();
+  yield setUp(server);
+  Service.identity.basicPassword = null;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_sync_syncAndReportErrors_non_network_error() {
+  // Test non-network errors are reported
+  // when calling syncAndReportErrors
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  generateCredentialsChangedFailure();
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+// XXX - how to arrange for 'Service.identity.basicPassword = null;' in
+// an fxaccounts environment?
+add_task(function test_login_syncAndReportErrors_prolonged_non_network_error() {
+  // Test prolonged, non-network errors are
+  // reported when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+  Service.identity.basicPassword = null;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_sync_syncAndReportErrors_prolonged_non_network_error() {
+  // Test prolonged, non-network errors are
+  // reported when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  generateCredentialsChangedFailure();
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_login_syncAndReportErrors_network_error() {
+  // Test network errors are reported when calling syncAndReportErrors.
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL  = FAKE_SERVER_URL;
+  Service.clusterURL = FAKE_SERVER_URL;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
+
+    clean();
+    deferred.resolve();
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+
+add_test(function test_sync_syncAndReportErrors_network_error() {
+  // Test network errors are reported when calling syncAndReportErrors.
+  Services.io.offline = true;
+
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
+
+    Services.io.offline = false;
+    clean();
+    run_next_test();
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+});
+
+add_identity_test(this, function test_login_syncAndReportErrors_prolonged_network_error() {
+  // Test prolonged, network errors are reported
+  // when calling syncAndReportErrors.
+  yield configureIdentity({username: "johndoe"});
+
+  Service.serverURL  = FAKE_SERVER_URL;
+  Service.clusterURL = FAKE_SERVER_URL;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
+
+    clean();
+    deferred.resolve();
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_test(function test_sync_syncAndReportErrors_prolonged_network_error() {
+  // Test prolonged, network errors are reported
+  // when calling syncAndReportErrors.
+  Services.io.offline = true;
+
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
+
+    Services.io.offline = false;
+    clean();
+    run_next_test();
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+});
+
+add_task(function test_login_prolonged_non_network_error() {
+  // Test prolonged, non-network errors are reported
+  let server = sync_httpd_setup();
+  yield setUp(server);
+  Service.identity.basicPassword = null;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_prolonged_non_network_error() {
+  // Test prolonged, non-network errors are reported
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  generateCredentialsChangedFailure();
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_login_prolonged_network_error() {
+  // Test prolonged, network errors are reported
+  yield configureIdentity({username: "johndoe"});
+  Service.serverURL  = FAKE_SERVER_URL;
+  Service.clusterURL = FAKE_SERVER_URL;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    deferred.resolve();
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_test(function test_sync_prolonged_network_error() {
+  // Test prolonged, network errors are reported
+  Services.io.offline = true;
+
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    Services.io.offline = false;
+    clean();
+    run_next_test();
+  });
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+});
+
+add_task(function test_login_non_network_error() {
+  // Test non-network errors are reported
+  let server = sync_httpd_setup();
+  yield setUp(server);
+  Service.identity.basicPassword = null;
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:login:error", onSyncError);
+    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_non_network_error() {
+  // Test non-network errors are reported
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  // By calling sync, we ensure we're logged in.
+  Service.sync();
+  do_check_eq(Status.sync, SYNC_SUCCEEDED);
+  do_check_true(Service.isLoggedIn);
+
+  generateCredentialsChangedFailure();
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_login_network_error() {
+  yield configureIdentity({username: "johndoe"});
+  Service.serverURL  = FAKE_SERVER_URL;
+  Service.clusterURL = FAKE_SERVER_URL;
+
+  let deferred = Promise.defer();
+  // Test network errors are not reported.
+  Svc.Obs.add("weave:ui:clear-error", function onClearError() {
+    Svc.Obs.remove("weave:ui:clear-error", onClearError);
+
+    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Services.io.offline = false;
+    clean();
+    deferred.resolve()
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_test(function test_sync_network_error() {
+  // Test network errors are not reported.
+  Services.io.offline = true;
+
+  Svc.Obs.add("weave:ui:sync:finish", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:finish", onUIUpdate);
+    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Services.io.offline = false;
+    clean();
+    run_next_test();
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+});
+
+add_identity_test(this, function test_sync_server_maintenance_error() {
+  // Test server maintenance errors are not reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  const BACKOFF = 42;
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  engine.exception = {status: 503,
+                      headers: {"retry-after": BACKOFF}};
+
+  function onSyncError() {
+    do_throw("Shouldn't get here!");
+  }
+  Svc.Obs.add("weave:ui:sync:error", onSyncError);
+
+  do_check_eq(Status.service, STATUS_OK);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:finish", function onSyncFinish() {
+    Svc.Obs.remove("weave:ui:sync:finish", onSyncFinish);
+
+    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
+    do_check_eq(Status.sync, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_info_collections_login_server_maintenance_error() {
+  // Test info/collections server maintenance errors are not reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  Service.username = "broken.info";
+  yield configureIdentity({username: "broken.info"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  function onUIUpdate() {
+    do_throw("Shouldn't experience UI update!");
+  }
+  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
+    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
+
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_meta_global_login_server_maintenance_error() {
+  // Test meta/global server maintenance errors are not reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.meta"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  function onUIUpdate() {
+    do_throw("Shouldn't get here!");
+  }
+  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
+    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
+
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_crypto_keys_login_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are not reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  // Force re-download of keys
+  Service.collectionKeys.clear();
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  function onUIUpdate() {
+    do_throw("Shouldn't get here!");
+  }
+  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
+    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
+
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_prolonged_server_maintenance_error() {
+  // Test prolonged server maintenance errors are reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  const BACKOFF = 42;
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  engine.exception = {status: 503,
+                      headers: {"retry-after": BACKOFF}};
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_info_collections_login_prolonged_server_maintenance_error(){
+  // Test info/collections prolonged server maintenance errors are reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.info"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_meta_global_login_prolonged_server_maintenance_error(){
+  // Test meta/global prolonged server maintenance errors are reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.meta"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_download_crypto_keys_login_prolonged_server_maintenance_error(){
+  // Test crypto/keys prolonged server maintenance errors are reported.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+  // Force re-download of keys
+  Service.collectionKeys.clear();
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_upload_crypto_keys_login_prolonged_server_maintenance_error(){
+  // Test crypto/keys prolonged server maintenance errors are reported.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_wipeServer_login_prolonged_server_maintenance_error(){
+  // Test that we report prolonged server maintenance errors that occur whilst
+  // wiping the server.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_wipeRemote_prolonged_server_maintenance_error(){
+  // Test that we report prolonged server maintenance errors that occur whilst
+  // wiping all remote devices.
+  let server = sync_httpd_setup();
+
+  server.registerPathHandler("/1.1/broken.wipe/storage/catapult", service_unavailable);
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+  generateAndUploadKeys();
+
+  let engine = engineManager.get("catapult");
+  engine.exception = null;
+  engine.enabled = true;
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
+    do_check_eq(Svc.Prefs.get("firstSync"), "wipeRemote");
+    do_check_true(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  Svc.Prefs.set("firstSync", "wipeRemote");
+  setLastSync(PROLONGED_ERROR_DURATION);
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_syncAndReportErrors_server_maintenance_error() {
+  // Test server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  const BACKOFF = 42;
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  engine.exception = {status: 503,
+                      headers: {"retry-after": BACKOFF}};
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
+    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
+    do_check_eq(Status.sync, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_info_collections_login_syncAndReportErrors_server_maintenance_error() {
+  // Test info/collections server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.info"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_meta_global_login_syncAndReportErrors_server_maintenance_error() {
+  // Test meta/global server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.meta"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_download_crypto_keys_login_syncAndReportErrors_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+  // Force re-download of keys
+  Service.collectionKeys.clear();
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_upload_crypto_keys_login_syncAndReportErrors_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_wipeServer_login_syncAndReportErrors_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_wipeRemote_syncAndReportErrors_server_maintenance_error(){
+  // Test that we report prolonged server maintenance errors that occur whilst
+  // wiping all remote devices.
+  let server = sync_httpd_setup();
+
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+  generateAndUploadKeys();
+
+  let engine = engineManager.get("catapult");
+  engine.exception = null;
+  engine.enabled = true;
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, SYNC_FAILED);
+    do_check_eq(Status.sync, SERVER_MAINTENANCE);
+    do_check_eq(Svc.Prefs.get("firstSync"), "wipeRemote");
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  Svc.Prefs.set("firstSync", "wipeRemote");
+  setLastSync(NON_PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test prolonged server maintenance errors are
+  // reported when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  const BACKOFF = 42;
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  engine.exception = {status: 503,
+                      headers: {"retry-after": BACKOFF}};
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
+    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
+    do_check_eq(Status.sync, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_info_collections_login_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test info/collections server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.info"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_meta_global_login_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test meta/global server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.meta"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_download_crypto_keys_login_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+  yield setUp(server);
+
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+  // Force re-download of keys
+  Service.collectionKeys.clear();
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_upload_crypto_keys_login_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.keys"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_identity_test(this, function test_wipeServer_login_syncAndReportErrors_prolonged_server_maintenance_error() {
+  // Test crypto/keys server maintenance errors are reported
+  // when calling syncAndReportErrors.
+  let server = sync_httpd_setup();
+
+  // Start off with an empty account, do not upload a key.
+  yield configureIdentity({username: "broken.wipe"});
+  Service.serverURL = server.baseURI + "/maintenance/";
+  Service.clusterURL = server.baseURI + "/maintenance/";
+
+  let backoffInterval;
+  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
+    Svc.Obs.remove("weave:service:backoff:interval", observe);
+    backoffInterval = subject;
+  });
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
+    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
+    do_check_true(Status.enforceBackoff);
+    do_check_eq(backoffInterval, 42);
+    do_check_eq(Status.service, LOGIN_FAILED);
+    do_check_eq(Status.login, SERVER_MAINTENANCE);
+    // syncAndReportErrors means dontIgnoreErrors, which means
+    // didReportProlongedError not touched.
+    do_check_false(errorHandler.didReportProlongedError);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_false(Status.enforceBackoff);
+  do_check_eq(Status.service, STATUS_OK);
+
+  setLastSync(PROLONGED_ERROR_DURATION);
+  errorHandler.syncAndReportErrors();
+  yield deferred.promise;
+});
+
+add_task(function test_sync_engine_generic_fail() {
+  let server = sync_httpd_setup();
+
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  engine.sync = function sync() {
+    Svc.Obs.notify("weave:engine:sync:error", "", "catapult");
+  };
+
+  let log = Log.repository.getLogger("Sync.ErrorHandler");
+  Svc.Prefs.set("log.appender.file.logOnError", true);
+
+  do_check_eq(Status.engines["catapult"], undefined);
+
+  let deferred = Promise.defer();
+  // Don't wait for reset-file-log until the sync is underway.
+  // This avoids us catching a delayed notification from an earlier test.
+  Svc.Obs.add("weave:engine:sync:finish", function onEngineFinish() {
+    Svc.Obs.remove("weave:engine:sync:finish", onEngineFinish);
+
+    log.info("Adding reset-file-log observer.");
+    Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
+      Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
+
+      // Put these checks here, not after sync(), so that we aren't racing the
+      // log handler... which resets everything just a few lines below!
+      _("Status.engines: " + JSON.stringify(Status.engines));
+      do_check_eq(Status.engines["catapult"], ENGINE_UNKNOWN_FAIL);
+      do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
+
+      // Test Error log was written on SYNC_FAILED_PARTIAL.
+      let entries = logsdir.directoryEntries;
+      do_check_true(entries.hasMoreElements());
+      let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
+      do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
+
+      clean();
+      server.stop(deferred.resolve);
+    });
+  });
+
+  do_check_true(yield setUp(server));
+  Service.sync();
+  yield deferred.promise;
+});
+
+add_test(function test_logs_on_sync_error_despite_shouldReportError() {
+  _("Ensure that an error is still logged when weave:service:sync:error " +
+    "is notified, despite shouldReportError returning false.");
+
+  let log = Log.repository.getLogger("Sync.ErrorHandler");
+  Svc.Prefs.set("log.appender.file.logOnError", true);
+  log.info("TESTING");
+
+  // Ensure that we report no error.
+  Status.login = MASTER_PASSWORD_LOCKED;
+  do_check_false(errorHandler.shouldReportError());
+
+  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
+    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
+
+    // Test that error log was written.
+    let entries = logsdir.directoryEntries;
+    do_check_true(entries.hasMoreElements());
+    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
+    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
+
+    clean();
+    run_next_test();
+  });
+  Svc.Obs.notify("weave:service:sync:error", {});
+});
+
+add_test(function test_logs_on_login_error_despite_shouldReportError() {
+  _("Ensure that an error is still logged when weave:service:login:error " +
+    "is notified, despite shouldReportError returning false.");
+
+  let log = Log.repository.getLogger("Sync.ErrorHandler");
+  Svc.Prefs.set("log.appender.file.logOnError", true);
+  log.info("TESTING");
+
+  // Ensure that we report no error.
+  Status.login = MASTER_PASSWORD_LOCKED;
+  do_check_false(errorHandler.shouldReportError());
+
+  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
+    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
+
+    // Test that error log was written.
+    let entries = logsdir.directoryEntries;
+    do_check_true(entries.hasMoreElements());
+    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
+    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
+
+    clean();
+    run_next_test();
+  });
+  Svc.Obs.notify("weave:service:login:error", {});
+});
+
+// This test should be the last one since it monkeypatches the engine object
+// and we should only have one engine object throughout the file (bug 629664).
+add_task(function test_engine_applyFailed() {
+  let server = sync_httpd_setup();
+
+  let engine = engineManager.get("catapult");
+  engine.enabled = true;
+  delete engine.exception;
+  engine.sync = function sync() {
+    Svc.Obs.notify("weave:engine:sync:applied", {newFailed:1}, "catapult");
+  };
+
+  let log = Log.repository.getLogger("Sync.ErrorHandler");
+  Svc.Prefs.set("log.appender.file.logOnError", true);
+
+  let deferred = Promise.defer();
+  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
+    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
+
+    do_check_eq(Status.engines["catapult"], ENGINE_APPLY_FAIL);
+    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
+
+    // Test Error log was written on SYNC_FAILED_PARTIAL.
+    let entries = logsdir.directoryEntries;
+    do_check_true(entries.hasMoreElements());
+    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
+    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
+
+    clean();
+    server.stop(deferred.resolve);
+  });
+
+  do_check_eq(Status.engines["catapult"], undefined);
+  do_check_true(yield setUp(server));
+  Service.sync();
+  yield deferred.promise;
+});
diff --git a/services/sync/tests/unit/test_errorhandler_1.js b/services/sync/tests/unit/test_errorhandler_1.js
deleted file mode 100644
index ea2070b48..000000000
--- a/services/sync/tests/unit/test_errorhandler_1.js
+++ /dev/null
@@ -1,913 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/engines/clients.js");
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/keys.js");
-Cu.import("resource://services-sync/policies.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/status.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://gre/modules/FileUtils.jsm");
-
-var fakeServer = new SyncServer();
-fakeServer.start();
-
-do_register_cleanup(function() {
-  return new Promise(resolve => {
-    fakeServer.stop(resolve);
-  });
-});
-
-var fakeServerUrl = "http://localhost:" + fakeServer.port;
-
-const logsdir = FileUtils.getDir("ProfD", ["weave", "logs"], true);
-
-const PROLONGED_ERROR_DURATION =
-  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') * 2) * 1000;
-
-const NON_PROLONGED_ERROR_DURATION =
-  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') / 2) * 1000;
-
-Service.engineManager.clear();
-
-function setLastSync(lastSyncValue) {
-  Svc.Prefs.set("lastSync", (new Date(Date.now() - lastSyncValue)).toString());
-}
-
-var engineManager = Service.engineManager;
-engineManager.register(EHTestsCommon.CatapultEngine);
-
-// This relies on Service/ErrorHandler being a singleton. Fixing this will take
-// a lot of work.
-var errorHandler = Service.errorHandler;
-
-function run_test() {
-  initTestLogging("Trace");
-
-  Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
-
-  ensureLegacyIdentityManager();
-
-  run_next_test();
-}
-
-
-function clean() {
-  Service.startOver();
-  Status.resetSync();
-  Status.resetBackoff();
-  errorHandler.didReportProlongedError = false;
-}
-
-add_identity_test(this, function* test_401_logout() {
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  yield sync_and_validate_telem();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:service:sync:error", onSyncError);
-  function onSyncError() {
-    _("Got weave:service:sync:error in first sync.");
-    Svc.Obs.remove("weave:service:sync:error", onSyncError);
-
-    // Wait for the automatic next sync.
-    function onLoginError() {
-      _("Got weave:service:login:error in second sync.");
-      Svc.Obs.remove("weave:service:login:error", onLoginError);
-
-      let expected = isConfiguredWithLegacyIdentity() ?
-                     LOGIN_FAILED_LOGIN_REJECTED : LOGIN_FAILED_NETWORK_ERROR;
-
-      do_check_eq(Status.login, expected);
-      do_check_false(Service.isLoggedIn);
-
-      // Clean up.
-      Utils.nextTick(function () {
-        Service.startOver();
-        server.stop(deferred.resolve);
-      });
-    }
-    Svc.Obs.add("weave:service:login:error", onLoginError);
-  }
-
-  // Make sync fail due to login rejected.
-  yield configureIdentity({username: "janedoe"});
-  Service._updateCachedURLs();
-
-  _("Starting first sync.");
-  let ping = yield sync_and_validate_telem(true);
-  deepEqual(ping.failureReason, { name: "httperror", code: 401 });
-  _("First sync done.");
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_credentials_changed_logout() {
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  yield sync_and_validate_telem();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  EHTestsCommon.generateCredentialsChangedFailure();
-
-  let ping = yield sync_and_validate_telem(true);
-  equal(ping.status.sync, CREDENTIALS_CHANGED);
-  deepEqual(ping.failureReason, {
-    name: "unexpectederror",
-    error: "Error: Aborting sync, remote setup failed"
-  });
-
-  do_check_eq(Status.sync, CREDENTIALS_CHANGED);
-  do_check_false(Service.isLoggedIn);
-
-  // Clean up.
-  Service.startOver();
-  let deferred = Promise.defer();
-  server.stop(deferred.resolve);
-  yield deferred.promise;
-});
-
-add_identity_test(this, function test_no_lastSync_pref() {
-  // Test reported error.
-  Status.resetSync();
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = CREDENTIALS_CHANGED;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test unreported error.
-  Status.resetSync();
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-
-});
-
-add_identity_test(this, function test_shouldReportError() {
-  Status.login = MASTER_PASSWORD_LOCKED;
-  do_check_false(errorHandler.shouldReportError());
-
-  // Give ourselves a clusterURL so that the temporary 401 no-error situation
-  // doesn't come into play.
-  Service.serverURL  = fakeServerUrl;
-  Service.clusterURL = fakeServerUrl;
-
-  // Test dontIgnoreErrors, non-network, non-prolonged, login error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = LOGIN_FAILED_NO_PASSWORD;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, non-network, non-prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = CREDENTIALS_CHANGED;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, non-network, prolonged, login error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = LOGIN_FAILED_NO_PASSWORD;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, non-network, prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = CREDENTIALS_CHANGED;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, network, non-prolonged, login error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, network, non-prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, network, prolonged, login error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test dontIgnoreErrors, network, prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-
-  // Test non-network, prolonged, login error reported
-  do_check_false(errorHandler.didReportProlongedError);
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = LOGIN_FAILED_NO_PASSWORD;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-
-  // Second time with prolonged error and without resetting
-  // didReportProlongedError, sync error should not be reported.
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = LOGIN_FAILED_NO_PASSWORD;
-  do_check_false(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-
-  // Test non-network, prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  errorHandler.didReportProlongedError = false;
-  Status.sync = CREDENTIALS_CHANGED;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-  errorHandler.didReportProlongedError = false;
-
-  // Test network, prolonged, login error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-  errorHandler.didReportProlongedError = false;
-
-  // Test network, prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-  errorHandler.didReportProlongedError = false;
-
-  // Test non-network, non-prolonged, login error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = LOGIN_FAILED_NO_PASSWORD;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test non-network, non-prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.sync = CREDENTIALS_CHANGED;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test network, non-prolonged, login error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_false(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test network, non-prolonged, sync error reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.sync = LOGIN_FAILED_NETWORK_ERROR;
-  do_check_false(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test server maintenance, sync errors are not reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.sync = SERVER_MAINTENANCE;
-  do_check_false(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test server maintenance, login errors are not reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = SERVER_MAINTENANCE;
-  do_check_false(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test prolonged, server maintenance, sync errors are reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.sync = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-  errorHandler.didReportProlongedError = false;
-
-  // Test prolonged, server maintenance, login errors are reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = false;
-  Status.login = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_true(errorHandler.didReportProlongedError);
-  errorHandler.didReportProlongedError = false;
-
-  // Test dontIgnoreErrors, server maintenance, sync errors are reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  // dontIgnoreErrors means we don't set didReportProlongedError
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test dontIgnoreErrors, server maintenance, login errors are reported
-  Status.resetSync();
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test dontIgnoreErrors, prolonged, server maintenance,
-  // sync errors are reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.sync = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-
-  // Test dontIgnoreErrors, prolonged, server maintenance,
-  // login errors are reported
-  Status.resetSync();
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.dontIgnoreErrors = true;
-  Status.login = SERVER_MAINTENANCE;
-  do_check_true(errorHandler.shouldReportError());
-  do_check_false(errorHandler.didReportProlongedError);
-});
-
-add_identity_test(this, function* test_shouldReportError_master_password() {
-  _("Test error ignored due to locked master password");
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // Monkey patch Service.verifyLogin to imitate
-  // master password being locked.
-  Service._verifyLogin = Service.verifyLogin;
-  Service.verifyLogin = function () {
-    Status.login = MASTER_PASSWORD_LOCKED;
-    return false;
-  };
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  do_check_false(errorHandler.shouldReportError());
-
-  // Clean up.
-  Service.verifyLogin = Service._verifyLogin;
-  clean();
-  let deferred = Promise.defer();
-  server.stop(deferred.resolve);
-  yield deferred.promise;
-});
-
-// Test that even if we don't have a cluster URL, a login failure due to
-// authentication errors is always reported.
-add_identity_test(this, function test_shouldReportLoginFailureWithNoCluster() {
-  // Ensure no clusterURL - any error not specific to login should not be reported.
-  Service.serverURL  = "";
-  Service.clusterURL = "";
-
-  // Test explicit "login rejected" state.
-  Status.resetSync();
-  // If we have a LOGIN_REJECTED state, we always report the error.
-  Status.login = LOGIN_FAILED_LOGIN_REJECTED;
-  do_check_true(errorHandler.shouldReportError());
-  // But any other status with a missing clusterURL is treated as a mid-sync
-  // 401 (ie, should be treated as a node reassignment)
-  Status.login = LOGIN_SUCCEEDED;
-  do_check_false(errorHandler.shouldReportError());
-});
-
-// XXX - how to arrange for 'Service.identity.basicPassword = null;' in
-// an fxaccounts environment?
-add_task(function* test_login_syncAndReportErrors_non_network_error() {
-  // Test non-network errors are reported
-  // when calling syncAndReportErrors
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-  Service.identity.basicPassword = null;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_sync_syncAndReportErrors_non_network_error() {
-  // Test non-network errors are reported
-  // when calling syncAndReportErrors
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  EHTestsCommon.generateCredentialsChangedFailure();
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
-    // If we clean this tick, telemetry won't get the right error
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    });
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  let ping = yield wait_for_ping(() => errorHandler.syncAndReportErrors(), true);
-  equal(ping.status.sync, CREDENTIALS_CHANGED);
-  deepEqual(ping.failureReason, {
-    name: "unexpectederror",
-    error: "Error: Aborting sync, remote setup failed"
-  });
-  yield deferred.promise;
-});
-
-// XXX - how to arrange for 'Service.identity.basicPassword = null;' in
-// an fxaccounts environment?
-add_task(function* test_login_syncAndReportErrors_prolonged_non_network_error() {
-  // Test prolonged, non-network errors are
-  // reported when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-  Service.identity.basicPassword = null;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_sync_syncAndReportErrors_prolonged_non_network_error() {
-  // Test prolonged, non-network errors are
-  // reported when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  EHTestsCommon.generateCredentialsChangedFailure();
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
-    // If we clean this tick, telemetry won't get the right error
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    });
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  let ping = yield wait_for_ping(() => errorHandler.syncAndReportErrors(), true);
-  equal(ping.status.sync, CREDENTIALS_CHANGED);
-  deepEqual(ping.failureReason, {
-    name: "unexpectederror",
-    error: "Error: Aborting sync, remote setup failed"
-  });
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_login_syncAndReportErrors_network_error() {
-  // Test network errors are reported when calling syncAndReportErrors.
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL  = fakeServerUrl;
-  Service.clusterURL = fakeServerUrl;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
-
-    clean();
-    deferred.resolve();
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-
-add_test(function test_sync_syncAndReportErrors_network_error() {
-  // Test network errors are reported when calling syncAndReportErrors.
-  Services.io.offline = true;
-
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
-
-    Services.io.offline = false;
-    clean();
-    run_next_test();
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-});
-
-add_identity_test(this, function* test_login_syncAndReportErrors_prolonged_network_error() {
-  // Test prolonged, network errors are reported
-  // when calling syncAndReportErrors.
-  yield configureIdentity({username: "johndoe"});
-
-  Service.serverURL  = fakeServerUrl;
-  Service.clusterURL = fakeServerUrl;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
-
-    clean();
-    deferred.resolve();
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_test(function test_sync_syncAndReportErrors_prolonged_network_error() {
-  // Test prolonged, network errors are reported
-  // when calling syncAndReportErrors.
-  Services.io.offline = true;
-
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
-
-    Services.io.offline = false;
-    clean();
-    run_next_test();
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-});
-
-add_task(function* test_login_prolonged_non_network_error() {
-  // Test prolonged, non-network errors are reported
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-  Service.identity.basicPassword = null;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_prolonged_non_network_error() {
-  // Test prolonged, non-network errors are reported
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  EHTestsCommon.generateCredentialsChangedFailure();
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    });
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-
-  let ping = yield sync_and_validate_telem(true);
-  equal(ping.status.sync, PROLONGED_SYNC_FAILURE);
-  deepEqual(ping.failureReason, {
-    name: "unexpectederror",
-    error: "Error: Aborting sync, remote setup failed"
-  });
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_login_prolonged_network_error() {
-  // Test prolonged, network errors are reported
-  yield configureIdentity({username: "johndoe"});
-  Service.serverURL  = fakeServerUrl;
-  Service.clusterURL = fakeServerUrl;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    deferred.resolve();
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_test(function test_sync_prolonged_network_error() {
-  // Test prolonged, network errors are reported
-  Services.io.offline = true;
-
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    Services.io.offline = false;
-    clean();
-    run_next_test();
-  });
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-});
-
-add_task(function* test_login_non_network_error() {
-  // Test non-network errors are reported
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-  Service.identity.basicPassword = null;
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:login:error", onSyncError);
-    do_check_eq(Status.login, LOGIN_FAILED_NO_PASSWORD);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_non_network_error() {
-  // Test non-network errors are reported
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  // By calling sync, we ensure we're logged in.
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED);
-  do_check_true(Service.isLoggedIn);
-
-  EHTestsCommon.generateCredentialsChangedFailure();
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onSyncError() {
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    do_check_eq(Status.sync, CREDENTIALS_CHANGED);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_login_network_error() {
-  yield configureIdentity({username: "johndoe"});
-  Service.serverURL  = fakeServerUrl;
-  Service.clusterURL = fakeServerUrl;
-
-  let deferred = Promise.defer();
-  // Test network errors are not reported.
-  Svc.Obs.add("weave:ui:clear-error", function onClearError() {
-    Svc.Obs.remove("weave:ui:clear-error", onClearError);
-
-    do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Services.io.offline = false;
-    clean();
-    deferred.resolve()
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_test(function test_sync_network_error() {
-  // Test network errors are not reported.
-  Services.io.offline = true;
-
-  Svc.Obs.add("weave:ui:sync:finish", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:finish", onUIUpdate);
-    do_check_eq(Status.sync, LOGIN_FAILED_NETWORK_ERROR);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Services.io.offline = false;
-    clean();
-    run_next_test();
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-});
-
-add_identity_test(this, function* test_sync_server_maintenance_error() {
-  // Test server maintenance errors are not reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  const BACKOFF = 42;
-  let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  engine.exception = {status: 503,
-                      headers: {"retry-after": BACKOFF}};
-
-  function onSyncError() {
-    do_throw("Shouldn't get here!");
-  }
-  Svc.Obs.add("weave:ui:sync:error", onSyncError);
-
-  do_check_eq(Status.service, STATUS_OK);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:finish", function onSyncFinish() {
-    Svc.Obs.remove("weave:ui:sync:finish", onSyncFinish);
-
-    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
-    do_check_eq(Status.sync, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Svc.Obs.remove("weave:ui:sync:error", onSyncError);
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    })
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  let ping = yield sync_and_validate_telem(true);
-  equal(ping.status.sync, SERVER_MAINTENANCE);
-  deepEqual(ping.engines.find(e => e.failureReason).failureReason, { name: "httperror", code: 503 })
-
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_info_collections_login_server_maintenance_error() {
-  // Test info/collections server maintenance errors are not reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  Service.username = "broken.info";
-  yield configureIdentity({username: "broken.info"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  function onUIUpdate() {
-    do_throw("Shouldn't experience UI update!");
-  }
-  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
-    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
-
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_meta_global_login_server_maintenance_error() {
-  // Test meta/global server maintenance errors are not reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.meta"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  function onUIUpdate() {
-    do_throw("Shouldn't get here!");
-  }
-  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
-    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
-
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
diff --git a/services/sync/tests/unit/test_errorhandler_2.js b/services/sync/tests/unit/test_errorhandler_2.js
deleted file mode 100644
index 41f8ee727..000000000
--- a/services/sync/tests/unit/test_errorhandler_2.js
+++ /dev/null
@@ -1,1012 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/engines/clients.js");
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/keys.js");
-Cu.import("resource://services-sync/policies.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/status.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://gre/modules/FileUtils.jsm");
-
-var fakeServer = new SyncServer();
-fakeServer.start();
-
-do_register_cleanup(function() {
-  return new Promise(resolve => {
-    fakeServer.stop(resolve);
-  });
-});
-
-var fakeServerUrl = "http://localhost:" + fakeServer.port;
-
-const logsdir = FileUtils.getDir("ProfD", ["weave", "logs"], true);
-
-const PROLONGED_ERROR_DURATION =
-  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') * 2) * 1000;
-
-const NON_PROLONGED_ERROR_DURATION =
-  (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') / 2) * 1000;
-
-Service.engineManager.clear();
-
-function setLastSync(lastSyncValue) {
-  Svc.Prefs.set("lastSync", (new Date(Date.now() - lastSyncValue)).toString());
-}
-
-var engineManager = Service.engineManager;
-engineManager.register(EHTestsCommon.CatapultEngine);
-
-// This relies on Service/ErrorHandler being a singleton. Fixing this will take
-// a lot of work.
-var errorHandler = Service.errorHandler;
-
-function run_test() {
-  initTestLogging("Trace");
-
-  Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
-
-  ensureLegacyIdentityManager();
-
-  run_next_test();
-}
-
-
-function clean() {
-  Service.startOver();
-  Status.resetSync();
-  Status.resetBackoff();
-  errorHandler.didReportProlongedError = false;
-}
-
-add_identity_test(this, function* test_crypto_keys_login_server_maintenance_error() {
-  Status.resetSync();
-  // Test crypto/keys server maintenance errors are not reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  // Force re-download of keys
-  Service.collectionKeys.clear();
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  function onUIUpdate() {
-    do_throw("Shouldn't get here!");
-  }
-  Svc.Obs.add("weave:ui:login:error", onUIUpdate);
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:clear-error", function onLoginFinish() {
-    Svc.Obs.remove("weave:ui:clear-error", onLoginFinish);
-
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_prolonged_server_maintenance_error() {
-  // Test prolonged server maintenance errors are reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  const BACKOFF = 42;
-  let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  engine.exception = {status: 503,
-                      headers: {"retry-after": BACKOFF}};
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    });
-  });
-
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  let ping = yield sync_and_validate_telem(true);
-  deepEqual(ping.status.sync, PROLONGED_SYNC_FAILURE);
-  deepEqual(ping.engines.find(e => e.failureReason).failureReason,
-            { name: "httperror", code: 503 });
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_info_collections_login_prolonged_server_maintenance_error(){
-  // Test info/collections prolonged server maintenance errors are reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.info"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_meta_global_login_prolonged_server_maintenance_error(){
-  // Test meta/global prolonged server maintenance errors are reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.meta"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_download_crypto_keys_login_prolonged_server_maintenance_error(){
-  // Test crypto/keys prolonged server maintenance errors are reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-  // Force re-download of keys
-  Service.collectionKeys.clear();
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_upload_crypto_keys_login_prolonged_server_maintenance_error(){
-  // Test crypto/keys prolonged server maintenance errors are reported.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_wipeServer_login_prolonged_server_maintenance_error(){
-  // Test that we report prolonged server maintenance errors that occur whilst
-  // wiping the server.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_true(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Service.sync();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_wipeRemote_prolonged_server_maintenance_error(){
-  // Test that we report prolonged server maintenance errors that occur whilst
-  // wiping all remote devices.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  server.registerPathHandler("/1.1/broken.wipe/storage/catapult", EHTestsCommon.service_unavailable);
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-  EHTestsCommon.generateAndUploadKeys();
-
-  let engine = engineManager.get("catapult");
-  engine.exception = null;
-  engine.enabled = true;
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, PROLONGED_SYNC_FAILURE);
-    do_check_eq(Svc.Prefs.get("firstSync"), "wipeRemote");
-    do_check_true(errorHandler.didReportProlongedError);
-    server.stop(() => {
-      clean();
-      deferred.resolve();
-    });
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  Svc.Prefs.set("firstSync", "wipeRemote");
-  setLastSync(PROLONGED_ERROR_DURATION);
-  let ping = yield sync_and_validate_telem(true);
-  deepEqual(ping.failureReason, { name: "httperror", code: 503 });
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_syncAndReportErrors_server_maintenance_error() {
-  // Test server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  const BACKOFF = 42;
-  let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  engine.exception = {status: 503,
-                      headers: {"retry-after": BACKOFF}};
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
-    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
-    do_check_eq(Status.sync, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_info_collections_login_syncAndReportErrors_server_maintenance_error() {
-  // Test info/collections server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.info"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_meta_global_login_syncAndReportErrors_server_maintenance_error() {
-  // Test meta/global server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.meta"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_download_crypto_keys_login_syncAndReportErrors_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-  // Force re-download of keys
-  Service.collectionKeys.clear();
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_upload_crypto_keys_login_syncAndReportErrors_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_wipeServer_login_syncAndReportErrors_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_wipeRemote_syncAndReportErrors_server_maintenance_error(){
-  // Test that we report prolonged server maintenance errors that occur whilst
-  // wiping all remote devices.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-  EHTestsCommon.generateAndUploadKeys();
-
-  let engine = engineManager.get("catapult");
-  engine.exception = null;
-  engine.enabled = true;
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, SYNC_FAILED);
-    do_check_eq(Status.sync, SERVER_MAINTENANCE);
-    do_check_eq(Svc.Prefs.get("firstSync"), "wipeRemote");
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  Svc.Prefs.set("firstSync", "wipeRemote");
-  setLastSync(NON_PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test prolonged server maintenance errors are
-  // reported when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  const BACKOFF = 42;
-  let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  engine.exception = {status: 503,
-                      headers: {"retry-after": BACKOFF}};
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:sync:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:sync:error", onUIUpdate);
-    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
-    do_check_eq(Status.sync, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_info_collections_login_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test info/collections server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.info"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_meta_global_login_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test meta/global server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.meta"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_download_crypto_keys_login_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-  yield EHTestsCommon.setUp(server);
-
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-  // Force re-download of keys
-  Service.collectionKeys.clear();
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_upload_crypto_keys_login_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.keys"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_identity_test(this, function* test_wipeServer_login_syncAndReportErrors_prolonged_server_maintenance_error() {
-  // Test crypto/keys server maintenance errors are reported
-  // when calling syncAndReportErrors.
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  // Start off with an empty account, do not upload a key.
-  yield configureIdentity({username: "broken.wipe"});
-  Service.serverURL = server.baseURI + "/maintenance/";
-  Service.clusterURL = server.baseURI + "/maintenance/";
-
-  let backoffInterval;
-  Svc.Obs.add("weave:service:backoff:interval", function observe(subject, data) {
-    Svc.Obs.remove("weave:service:backoff:interval", observe);
-    backoffInterval = subject;
-  });
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:ui:login:error", function onUIUpdate() {
-    Svc.Obs.remove("weave:ui:login:error", onUIUpdate);
-    do_check_true(Status.enforceBackoff);
-    do_check_eq(backoffInterval, 42);
-    do_check_eq(Status.service, LOGIN_FAILED);
-    do_check_eq(Status.login, SERVER_MAINTENANCE);
-    // syncAndReportErrors means dontIgnoreErrors, which means
-    // didReportProlongedError not touched.
-    do_check_false(errorHandler.didReportProlongedError);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_false(Status.enforceBackoff);
-  do_check_eq(Status.service, STATUS_OK);
-
-  setLastSync(PROLONGED_ERROR_DURATION);
-  errorHandler.syncAndReportErrors();
-  yield deferred.promise;
-});
-
-add_task(function* test_sync_engine_generic_fail() {
-  let server = EHTestsCommon.sync_httpd_setup();
-
-let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  engine.sync = function sync() {
-    Svc.Obs.notify("weave:engine:sync:error", ENGINE_UNKNOWN_FAIL, "catapult");
-  };
-
-  let log = Log.repository.getLogger("Sync.ErrorHandler");
-  Svc.Prefs.set("log.appender.file.logOnError", true);
-
-  do_check_eq(Status.engines["catapult"], undefined);
-
-  let deferred = Promise.defer();
-  // Don't wait for reset-file-log until the sync is underway.
-  // This avoids us catching a delayed notification from an earlier test.
-  Svc.Obs.add("weave:engine:sync:finish", function onEngineFinish() {
-    Svc.Obs.remove("weave:engine:sync:finish", onEngineFinish);
-
-    log.info("Adding reset-file-log observer.");
-    Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
-      Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
-
-      // Put these checks here, not after sync(), so that we aren't racing the
-      // log handler... which resets everything just a few lines below!
-      _("Status.engines: " + JSON.stringify(Status.engines));
-      do_check_eq(Status.engines["catapult"], ENGINE_UNKNOWN_FAIL);
-      do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
-
-      // Test Error log was written on SYNC_FAILED_PARTIAL.
-      let entries = logsdir.directoryEntries;
-      do_check_true(entries.hasMoreElements());
-      let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
-      do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
-
-      clean();
-
-      let syncErrors = sumHistogram("WEAVE_ENGINE_SYNC_ERRORS", { key: "catapult" });
-      do_check_true(syncErrors, 1);
-
-      server.stop(() => {
-        clean();
-        deferred.resolve();
-      });
-    });
-  });
-
-  do_check_true(yield EHTestsCommon.setUp(server));
-  let ping = yield sync_and_validate_telem(true);
-  deepEqual(ping.status.service, SYNC_FAILED_PARTIAL);
-  deepEqual(ping.engines.find(e => e.status).status, ENGINE_UNKNOWN_FAIL);
-
-  yield deferred.promise;
-});
-
-add_test(function test_logs_on_sync_error_despite_shouldReportError() {
-  _("Ensure that an error is still logged when weave:service:sync:error " +
-    "is notified, despite shouldReportError returning false.");
-
-  let log = Log.repository.getLogger("Sync.ErrorHandler");
-  Svc.Prefs.set("log.appender.file.logOnError", true);
-  log.info("TESTING");
-
-  // Ensure that we report no error.
-  Status.login = MASTER_PASSWORD_LOCKED;
-  do_check_false(errorHandler.shouldReportError());
-
-  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
-    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
-
-    // Test that error log was written.
-    let entries = logsdir.directoryEntries;
-    do_check_true(entries.hasMoreElements());
-    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
-    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
-
-    clean();
-    run_next_test();
-  });
-  Svc.Obs.notify("weave:service:sync:error", {});
-});
-
-add_test(function test_logs_on_login_error_despite_shouldReportError() {
-  _("Ensure that an error is still logged when weave:service:login:error " +
-    "is notified, despite shouldReportError returning false.");
-
-  let log = Log.repository.getLogger("Sync.ErrorHandler");
-  Svc.Prefs.set("log.appender.file.logOnError", true);
-  log.info("TESTING");
-
-  // Ensure that we report no error.
-  Status.login = MASTER_PASSWORD_LOCKED;
-  do_check_false(errorHandler.shouldReportError());
-
-  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
-    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
-
-    // Test that error log was written.
-    let entries = logsdir.directoryEntries;
-    do_check_true(entries.hasMoreElements());
-    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
-    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
-
-    clean();
-    run_next_test();
-  });
-  Svc.Obs.notify("weave:service:login:error", {});
-});
-
-// This test should be the last one since it monkeypatches the engine object
-// and we should only have one engine object throughout the file (bug 629664).
-add_task(function* test_engine_applyFailed() {
-  let server = EHTestsCommon.sync_httpd_setup();
-
-  let engine = engineManager.get("catapult");
-  engine.enabled = true;
-  delete engine.exception;
-  engine.sync = function sync() {
-    Svc.Obs.notify("weave:engine:sync:applied", {newFailed:1}, "catapult");
-  };
-
-  let log = Log.repository.getLogger("Sync.ErrorHandler");
-  Svc.Prefs.set("log.appender.file.logOnError", true);
-
-  let deferred = Promise.defer();
-  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
-    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
-
-    do_check_eq(Status.engines["catapult"], ENGINE_APPLY_FAIL);
-    do_check_eq(Status.service, SYNC_FAILED_PARTIAL);
-
-    // Test Error log was written on SYNC_FAILED_PARTIAL.
-    let entries = logsdir.directoryEntries;
-    do_check_true(entries.hasMoreElements());
-    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
-    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
-
-    clean();
-    server.stop(deferred.resolve);
-  });
-
-  do_check_eq(Status.engines["catapult"], undefined);
-  do_check_true(yield EHTestsCommon.setUp(server));
-  Service.sync();
-  yield deferred.promise;
-});
diff --git a/services/sync/tests/unit/test_errorhandler_eol.js b/services/sync/tests/unit/test_errorhandler_eol.js
index c8d2ff4be..381bc7268 100644
--- a/services/sync/tests/unit/test_errorhandler_eol.js
+++ b/services/sync/tests/unit/test_errorhandler_eol.js
@@ -43,7 +43,7 @@ function sync_httpd_setup(infoHandler) {
   return httpd_setup(handlers);
 }
 
-function* setUp(server) {
+function setUp(server) {
   yield configureIdentity({username: "johndoe"});
   Service.serverURL = server.baseURI + "/";
   Service.clusterURL = server.baseURI + "/";
@@ -66,7 +66,7 @@ function do_check_hard_eol(eh, start) {
   do_check_true(Status.eol);
 }
 
-add_identity_test(this, function* test_200_hard() {
+add_identity_test(this, function test_200_hard() {
   let eh = Service.errorHandler;
   let start = Date.now();
   let server = sync_httpd_setup(handler200("hard-eol"));
@@ -88,7 +88,7 @@ add_identity_test(this, function* test_200_hard() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_513_hard() {
+add_identity_test(this, function test_513_hard() {
   let eh = Service.errorHandler;
   let start = Date.now();
   let server = sync_httpd_setup(handler513);
@@ -114,7 +114,7 @@ add_identity_test(this, function* test_513_hard() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_200_soft() {
+add_identity_test(this, function test_200_soft() {
   let eh = Service.errorHandler;
   let start = Date.now();
   let server = sync_httpd_setup(handler200("soft-eol"));
diff --git a/services/sync/tests/unit/test_errorhandler_filelog.js b/services/sync/tests/unit/test_errorhandler_filelog.js
index 993a478fd..0ce82b170 100644
--- a/services/sync/tests/unit/test_errorhandler_filelog.js
+++ b/services/sync/tests/unit/test_errorhandler_filelog.js
@@ -21,7 +21,7 @@ const DELAY_BUFFER       = 500;  // Buffer for timers on different OS platforms.
 const PROLONGED_ERROR_DURATION =
   (Svc.Prefs.get('errorhandler.networkFailureReportTimeout') * 2) * 1000;
 
-var errorHandler = Service.errorHandler;
+let errorHandler = Service.errorHandler;
 
 function setLastSync(lastSyncValue) {
   Svc.Prefs.set("lastSync", (new Date(Date.now() - lastSyncValue)).toString());
@@ -35,8 +35,6 @@ function run_test() {
   Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
   Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
 
-  validate_all_future_pings();
-
   run_next_test();
 }
 
@@ -47,22 +45,20 @@ add_test(function test_noOutput() {
   // Clear log output from startup.
   Svc.Prefs.set("log.appender.file.logOnSuccess", false);
   Svc.Obs.notify("weave:service:sync:finish");
-  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLogOuter() {
-    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLogOuter);
-    // Clear again without having issued any output.
-    Svc.Prefs.set("log.appender.file.logOnSuccess", true);
 
-    Svc.Obs.add("weave:service:reset-file-log", function onResetFileLogInner() {
-      Svc.Obs.remove("weave:service:reset-file-log", onResetFileLogInner);
+  // Clear again without having issued any output.
+  Svc.Prefs.set("log.appender.file.logOnSuccess", true);
 
-      errorHandler._logManager._fileAppender.level = Log.Level.Trace;
-      Svc.Prefs.resetBranch("");
-      run_next_test();
-    });
+  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
+    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
 
-    // Fake a successful sync.
-    Svc.Obs.notify("weave:service:sync:finish");
+    errorHandler._logManager._fileAppender.level = Log.Level.Trace;
+    Svc.Prefs.resetBranch("");
+    run_next_test();
   });
+
+  // Fake a successful sync.
+  Svc.Obs.notify("weave:service:sync:finish");
 });
 
 add_test(function test_logOnSuccess_false() {
@@ -85,14 +81,16 @@ add_test(function test_logOnSuccess_false() {
 });
 
 function readFile(file, callback) {
-  NetUtil.asyncFetch({
-    uri: NetUtil.newURI(file),
-    loadUsingSystemPrincipal: true
-  }, function (inputStream, statusCode, request) {
+  NetUtil.asyncFetch2(file, function (inputStream, statusCode, request) {
     let data = NetUtil.readInputStreamToString(inputStream,
                                                inputStream.available());
     callback(statusCode, data);
-  });
+  },
+  null,      // aLoadingNode
+  Services.scriptSecurityManager.getSystemPrincipal(),
+  null,      // aTriggeringPrincipal
+  Ci.nsILoadInfo.SEC_NORMAL,
+  Ci.nsIContentPolicy.TYPE_OTHER);
 }
 
 add_test(function test_logOnSuccess_true() {
@@ -269,51 +267,6 @@ add_test(function test_login_error_logOnError_true() {
   Svc.Obs.notify("weave:service:login:error");
 });
 
-
-add_test(function test_errorLog_dumpAddons() {
-  Svc.Prefs.set("log.appender.file.logOnError", true);
-
-  let log = Log.repository.getLogger("Sync.Test.FileLog");
-
-  // We need to wait until the log cleanup started by this test is complete
-  // or the next test will fail as it is ongoing.
-  Svc.Obs.add("services-tests:common:log-manager:cleanup-logs", function onCleanupLogs() {
-    Svc.Obs.remove("services-tests:common:log-manager:cleanup-logs", onCleanupLogs);
-    run_next_test();
-  });
-
-  Svc.Obs.add("weave:service:reset-file-log", function onResetFileLog() {
-    Svc.Obs.remove("weave:service:reset-file-log", onResetFileLog);
-
-    let entries = logsdir.directoryEntries;
-    do_check_true(entries.hasMoreElements());
-    let logfile = entries.getNext().QueryInterface(Ci.nsILocalFile);
-    do_check_eq(logfile.leafName.slice(-4), ".txt");
-    do_check_true(logfile.leafName.startsWith("error-sync-"), logfile.leafName);
-    do_check_false(entries.hasMoreElements());
-
-    // Ensure we logged some addon list (which is probably empty)
-    readFile(logfile, function (error, data) {
-      do_check_true(Components.isSuccessCode(error));
-      do_check_neq(data.indexOf("Addons installed"), -1);
-
-      // Clean up.
-      try {
-        logfile.remove(false);
-      } catch(ex) {
-        dump("Couldn't delete file: " + ex + "\n");
-        // Stupid Windows box.
-      }
-
-      Svc.Prefs.resetBranch("");
-    });
-  });
-
-  // Fake an unsuccessful sync due to prolonged failure.
-  setLastSync(PROLONGED_ERROR_DURATION);
-  Svc.Obs.notify("weave:service:sync:error");
-});
-
 // Check that error log files are deleted above an age threshold.
 add_test(function test_logErrorCleanup_age() {
   _("Beginning test_logErrorCleanup_age.");
diff --git a/services/sync/tests/unit/test_errorhandler_sync_checkServerError.js b/services/sync/tests/unit/test_errorhandler_sync_checkServerError.js
index 953f59fcb..18cea2cce 100644
--- a/services/sync/tests/unit/test_errorhandler_sync_checkServerError.js
+++ b/services/sync/tests/unit/test_errorhandler_sync_checkServerError.js
@@ -13,7 +13,7 @@ Cu.import("resource://testing-common/services/sync/utils.js");
 
 initTestLogging("Trace");
 
-var engineManager = Service.engineManager;
+let engineManager = Service.engineManager;
 engineManager.clear();
 
 function promiseStopServer(server) {
@@ -59,7 +59,7 @@ function sync_httpd_setup() {
   return httpd_setup(handlers);
 }
 
-function* setUp(server) {
+function setUp(server) {
   yield configureIdentity({username: "johndoe"});
   Service.serverURL = server.baseURI + "/";
   Service.clusterURL = server.baseURI + "/";
@@ -75,7 +75,7 @@ function generateAndUploadKeys(server) {
 }
 
 
-add_identity_test(this, function* test_backoff500() {
+add_identity_test(this, function test_backoff500() {
   _("Test: HTTP 500 sets backoff status.");
   let server = sync_httpd_setup();
   yield setUp(server);
@@ -102,7 +102,7 @@ add_identity_test(this, function* test_backoff500() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_backoff503() {
+add_identity_test(this, function test_backoff503() {
   _("Test: HTTP 503 with Retry-After header leads to backoff notification and sets backoff status.");
   let server = sync_httpd_setup();
   yield setUp(server);
@@ -138,7 +138,7 @@ add_identity_test(this, function* test_backoff503() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_overQuota() {
+add_identity_test(this, function test_overQuota() {
   _("Test: HTTP 400 with body error code 14 means over quota.");
   let server = sync_httpd_setup();
   yield setUp(server);
@@ -167,7 +167,7 @@ add_identity_test(this, function* test_overQuota() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_service_networkError() {
+add_identity_test(this, function test_service_networkError() {
   _("Test: Connection refused error from Service.sync() leads to the right status code.");
   let server = sync_httpd_setup();
   yield setUp(server);
@@ -193,14 +193,13 @@ add_identity_test(this, function* test_service_networkError() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_service_offline() {
+add_identity_test(this, function test_service_offline() {
   _("Test: Wanting to sync in offline mode leads to the right status code but does not increment the ignorable error count.");
   let server = sync_httpd_setup();
   yield setUp(server);
   let deferred = Promise.defer();
   server.stop(() => {
     Services.io.offline = true;
-    Services.prefs.setBoolPref("network.dns.offline-localhost", false);
 
     try {
       do_check_eq(Status.sync, SYNC_SUCCEEDED);
@@ -215,13 +214,12 @@ add_identity_test(this, function* test_service_offline() {
       Service.startOver();
     }
     Services.io.offline = false;
-    Services.prefs.clearUserPref("network.dns.offline-localhost");
     deferred.resolve();
   });
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_engine_networkError() {
+add_identity_test(this, function test_engine_networkError() {
   _("Test: Network related exceptions from engine.sync() lead to the right status code.");
   let server = sync_httpd_setup();
   yield setUp(server);
@@ -248,7 +246,7 @@ add_identity_test(this, function* test_engine_networkError() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_resource_timeout() {
+add_identity_test(this, function test_resource_timeout() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -276,7 +274,6 @@ add_identity_test(this, function* test_resource_timeout() {
 });
 
 function run_test() {
-  validate_all_future_pings();
   engineManager.register(CatapultEngine);
   run_next_test();
 }
diff --git a/services/sync/tests/unit/test_extension_storage_crypto.js b/services/sync/tests/unit/test_extension_storage_crypto.js
deleted file mode 100644
index f93e4970d..000000000
--- a/services/sync/tests/unit/test_extension_storage_crypto.js
+++ /dev/null
@@ -1,93 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-Cu.import("resource://services-crypto/utils.js");
-Cu.import("resource://services-sync/engines/extension-storage.js");
-Cu.import("resource://services-sync/util.js");
-
-/**
- * Like Assert.throws, but for generators.
- *
- * @param {string | Object | function} constraint
- *        What to use to check the exception.
- * @param {function} f
- *        The function to call.
- */
-function* throwsGen(constraint, f) {
-  let threw = false;
-  let exception;
-  try {
-    yield* f();
-  }
-  catch (e) {
-    threw = true;
-    exception = e;
-  }
-
-  ok(threw, "did not throw an exception");
-
-  const debuggingMessage = `got ${exception}, expected ${constraint}`;
-  let message = exception;
-  if (typeof exception === "object") {
-    message = exception.message;
-  }
-
-  if (typeof constraint === "function") {
-    ok(constraint(message), debuggingMessage);
-  } else {
-    ok(constraint === message, debuggingMessage);
-  }
-
-}
-
-/**
- * An EncryptionRemoteTransformer that uses a fixed key bundle,
- * suitable for testing.
- */
-class StaticKeyEncryptionRemoteTransformer extends EncryptionRemoteTransformer {
-  constructor(keyBundle) {
-    super();
-    this.keyBundle = keyBundle;
-  }
-
-  getKeys() {
-    return Promise.resolve(this.keyBundle);
-  }
-}
-const BORING_KB = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef";
-const STRETCHED_KEY = CryptoUtils.hkdf(BORING_KB, undefined, `testing storage.sync encryption`, 2*32);
-const KEY_BUNDLE = {
-  sha256HMACHasher: Utils.makeHMACHasher(Ci.nsICryptoHMAC.SHA256, Utils.makeHMACKey(STRETCHED_KEY.slice(0, 32))),
-  encryptionKeyB64: btoa(STRETCHED_KEY.slice(32, 64)),
-};
-const transformer = new StaticKeyEncryptionRemoteTransformer(KEY_BUNDLE);
-
-add_task(function* test_encryption_transformer_roundtrip() {
-  const POSSIBLE_DATAS = [
-    "string",
-    2,          // number
-    [1, 2, 3],  // array
-    {key: "value"}, // object
-  ];
-
-  for (let data of POSSIBLE_DATAS) {
-    const record = {data: data, id: "key-some_2D_key", key: "some-key"};
-
-    deepEqual(record, yield transformer.decode(yield transformer.encode(record)));
-  }
-});
-
-add_task(function* test_refuses_to_decrypt_tampered() {
-  const encryptedRecord = yield transformer.encode({data: [1, 2, 3], id: "key-some_2D_key", key: "some-key"});
-  const tamperedHMAC = Object.assign({}, encryptedRecord, {hmac: "0000000000000000000000000000000000000000000000000000000000000001"});
-  yield* throwsGen(Utils.isHMACMismatch, function*() {
-    yield transformer.decode(tamperedHMAC);
-  });
-
-  const tamperedIV = Object.assign({}, encryptedRecord, {IV: "aaaaaaaaaaaaaaaaaaaaaa=="});
-  yield* throwsGen(Utils.isHMACMismatch, function*() {
-    yield transformer.decode(tamperedIV);
-  });
-});
diff --git a/services/sync/tests/unit/test_extension_storage_engine.js b/services/sync/tests/unit/test_extension_storage_engine.js
deleted file mode 100644
index 1b2792703..000000000
--- a/services/sync/tests/unit/test_extension_storage_engine.js
+++ /dev/null
@@ -1,62 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/extension-storage.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://gre/modules/ExtensionStorageSync.jsm");
-
-Service.engineManager.register(ExtensionStorageEngine);
-const engine = Service.engineManager.get("extension-storage");
-do_get_profile();   // so we can use FxAccounts
-loadWebExtensionTestFunctions();
-
-function mock(options) {
-  let calls = [];
-  let ret = function() {
-    calls.push(arguments);
-    return options.returns;
-  }
-  Object.setPrototypeOf(ret, {
-    __proto__: Function.prototype,
-    get calls() {
-      return calls;
-    }
-  });
-  return ret;
-}
-
-add_task(function* test_calling_sync_calls__sync() {
-  let oldSync = ExtensionStorageEngine.prototype._sync;
-  let syncMock = ExtensionStorageEngine.prototype._sync = mock({returns: true});
-  try {
-    // I wanted to call the main sync entry point for the entire
-    // package, but that fails because it tries to sync ClientEngine
-    // first, which fails.
-    yield engine.sync();
-  } finally {
-    ExtensionStorageEngine.prototype._sync = oldSync;
-  }
-  equal(syncMock.calls.length, 1);
-});
-
-add_task(function* test_calling_sync_calls_ext_storage_sync() {
-  const extension = {id: "my-extension"};
-  let oldSync = ExtensionStorageSync.syncAll;
-  let syncMock = ExtensionStorageSync.syncAll = mock({returns: Promise.resolve()});
-  try {
-    yield* withSyncContext(function* (context) {
-      // Set something so that everyone knows that we're using storage.sync
-      yield ExtensionStorageSync.set(extension, {"a": "b"}, context);
-
-      yield engine._sync();
-    });
-  } finally {
-    ExtensionStorageSync.syncAll = oldSync;
-  }
-  do_check_true(syncMock.calls.length >= 1);
-});
diff --git a/services/sync/tests/unit/test_extension_storage_tracker.js b/services/sync/tests/unit/test_extension_storage_tracker.js
deleted file mode 100644
index fac51a897..000000000
--- a/services/sync/tests/unit/test_extension_storage_tracker.js
+++ /dev/null
@@ -1,38 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/extension-storage.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://gre/modules/ExtensionStorageSync.jsm");
-
-Service.engineManager.register(ExtensionStorageEngine);
-const engine = Service.engineManager.get("extension-storage");
-do_get_profile();   // so we can use FxAccounts
-loadWebExtensionTestFunctions();
-
-add_task(function* test_changing_extension_storage_changes_score() {
-  const tracker = engine._tracker;
-  const extension = {id: "my-extension-id"};
-  Svc.Obs.notify("weave:engine:start-tracking");
-  yield* withSyncContext(function*(context) {
-    yield ExtensionStorageSync.set(extension, {"a": "b"}, context);
-  });
-  do_check_eq(tracker.score, SCORE_INCREMENT_MEDIUM);
-
-  tracker.resetScore();
-  yield* withSyncContext(function*(context) {
-    yield ExtensionStorageSync.remove(extension, "a", context);
-  });
-  do_check_eq(tracker.score, SCORE_INCREMENT_MEDIUM);
-
-  Svc.Obs.notify("weave:engine:stop-tracking");
-});
-
-function run_test() {
-  run_next_test();
-}
diff --git a/services/sync/tests/unit/test_forms_tracker.js b/services/sync/tests/unit/test_forms_tracker.js
index f14e208b3..5f7aaa648 100644
--- a/services/sync/tests/unit/test_forms_tracker.js
+++ b/services/sync/tests/unit/test_forms_tracker.js
@@ -40,18 +40,6 @@ function run_test() {
     addEntry("address", "Memory Lane");
     do_check_attribute_count(tracker.changedIDs, 3);
 
-
-    _("Check that ignoreAll is respected");
-    tracker.clearChangedIDs();
-    tracker.score = 0;
-    tracker.ignoreAll = true;
-    addEntry("username", "johndoe123");
-    addEntry("favoritecolor", "green");
-    removeEntry("name", "John Doe");
-    tracker.ignoreAll = false;
-    do_check_empty(tracker.changedIDs);
-    equal(tracker.score, 0);
-
     _("Let's stop tracking again.");
     tracker.clearChangedIDs();
     Svc.Obs.notify("weave:engine:stop-tracking");
@@ -63,8 +51,6 @@ function run_test() {
     removeEntry("email", "john@doe.com");
     do_check_empty(tracker.changedIDs);
 
-
-
   } finally {
     _("Clean up.");
     engine._store.wipe();
diff --git a/services/sync/tests/unit/test_fxa_node_reassignment.js b/services/sync/tests/unit/test_fxa_node_reassignment.js
index 3e4cefd53..2f61afd6f 100644
--- a/services/sync/tests/unit/test_fxa_node_reassignment.js
+++ b/services/sync/tests/unit/test_fxa_node_reassignment.js
@@ -1,368 +1,321 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-_("Test that node reassignment happens correctly using the FxA identity mgr.");
-// The node-reassignment logic is quite different for FxA than for the legacy
-// provider.  In particular, there's no special request necessary for
-// reassignment - it comes from the token server - so we need to ensure the
-// Fxa cluster manager grabs a new token.
-
-Cu.import("resource://gre/modules/Log.jsm");
-Cu.import("resource://services-common/rest.js");
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/status.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/rotaryengine.js");
-Cu.import("resource://services-sync/browserid_identity.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-
-Service.engineManager.clear();
-
-function run_test() {
-  Log.repository.getLogger("Sync.AsyncResource").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.ErrorHandler").level  = Log.Level.Trace;
-  Log.repository.getLogger("Sync.Resource").level      = Log.Level.Trace;
-  Log.repository.getLogger("Sync.RESTRequest").level   = Log.Level.Trace;
-  Log.repository.getLogger("Sync.Service").level       = Log.Level.Trace;
-  Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
-  initTestLogging();
-
-  Service.engineManager.register(RotaryEngine);
-
-  // Setup the FxA identity manager and cluster manager.
-  Status.__authManager = Service.identity = new BrowserIDManager();
-  Service._clusterManager = Service.identity.createClusterManager(Service);
-
-  // None of the failures in this file should result in a UI error.
-  function onUIError() {
-    do_throw("Errors should not be presented in the UI.");
-  }
-  Svc.Obs.add("weave:ui:login:error", onUIError);
-  Svc.Obs.add("weave:ui:sync:error", onUIError);
-
-  run_next_test();
-}
-
-
-// API-compatible with SyncServer handler. Bind `handler` to something to use
-// as a ServerCollection handler.
-function handleReassign(handler, req, resp) {
-  resp.setStatusLine(req.httpVersion, 401, "Node reassignment");
-  resp.setHeader("Content-Type", "application/json");
-  let reassignBody = JSON.stringify({error: "401inator in place"});
-  resp.bodyOutputStream.write(reassignBody, reassignBody.length);
-}
-
-var numTokenRequests = 0;
-
-function prepareServer(cbAfterTokenFetch) {
-  let config = makeIdentityConfig({username: "johndoe"});
-  // A server callback to ensure we don't accidentally hit the wrong endpoint
-  // after a node reassignment.
-  let callback = {
-    __proto__: SyncServerCallback,
-    onRequest(req, resp) {
-      let full = `${req.scheme}://${req.host}:${req.port}${req.path}`;
-      do_check_true(full.startsWith(config.fxaccount.token.endpoint),
-                    `request made to ${full}`);
-    }
-  }
-  let server = new SyncServer(callback);
-  server.registerUser("johndoe");
-  server.start();
-
-  // Set the token endpoint for the initial token request that's done implicitly
-  // via configureIdentity.
-  config.fxaccount.token.endpoint = server.baseURI + "1.1/johndoe/";
-  // And future token fetches will do magic around numReassigns.
-  let numReassigns = 0;
-  return configureIdentity(config).then(() => {
-    Service.identity._tokenServerClient = {
-      getTokenFromBrowserIDAssertion: function(uri, assertion, cb) {
-        // Build a new URL with trailing zeros for the SYNC_VERSION part - this
-        // will still be seen as equivalent by the test server, but different
-        // by sync itself.
-        numReassigns += 1;
-        let trailingZeros = new Array(numReassigns + 1).join('0');
-        let token = config.fxaccount.token;
-        token.endpoint = server.baseURI + "1.1" + trailingZeros + "/johndoe";
-        token.uid = config.username;
-        numTokenRequests += 1;
-        cb(null, token);
-        if (cbAfterTokenFetch) {
-          cbAfterTokenFetch();
-        }
-      },
-    };
-    return server;
-  });
-}
-
-function getReassigned() {
-  try {
-    return Services.prefs.getBoolPref("services.sync.lastSyncReassigned");
-  } catch (ex) {
-    if (ex.result == Cr.NS_ERROR_UNEXPECTED) {
-      return false;
-    }
-    do_throw("Got exception retrieving lastSyncReassigned: " +
-             Log.exceptionStr(ex));
-  }
-}
-
-/**
- * Make a test request to `url`, then watch the result of two syncs
- * to ensure that a node request was made.
- * Runs `between` between the two. This can be used to undo deliberate failure
- * setup, detach observers, etc.
- */
-function* syncAndExpectNodeReassignment(server, firstNotification, between,
-                                       secondNotification, url) {
-  _("Starting syncAndExpectNodeReassignment\n");
-  let deferred = Promise.defer();
-  function onwards() {
-    let numTokenRequestsBefore;
-    function onFirstSync() {
-      _("First sync completed.");
-      Svc.Obs.remove(firstNotification, onFirstSync);
-      Svc.Obs.add(secondNotification, onSecondSync);
-
-      do_check_eq(Service.clusterURL, "");
-
-      // Track whether we fetched a new token.
-      numTokenRequestsBefore = numTokenRequests;
-
-      // Allow for tests to clean up error conditions.
-      between();
-    }
-    function onSecondSync() {
-      _("Second sync completed.");
-      Svc.Obs.remove(secondNotification, onSecondSync);
-      Service.scheduler.clearSyncTriggers();
-
-      // Make absolutely sure that any event listeners are done with their work
-      // before we proceed.
-      waitForZeroTimer(function () {
-        _("Second sync nextTick.");
-        do_check_eq(numTokenRequests, numTokenRequestsBefore + 1, "fetched a new token");
-        Service.startOver();
-        server.stop(deferred.resolve);
-      });
-    }
-
-    Svc.Obs.add(firstNotification, onFirstSync);
-    Service.sync();
-  }
-
-  // Make sure that we really do get a 401 (but we can only do that if we are
-  // already logged in, as the login process is what sets up the URLs)
-  if (Service.isLoggedIn) {
-    _("Making request to " + url + " which should 401");
-    let request = new RESTRequest(url);
-    request.get(function () {
-      do_check_eq(request.response.status, 401);
-      Utils.nextTick(onwards);
-    });
-  } else {
-    _("Skipping preliminary validation check for a 401 as we aren't logged in");
-    Utils.nextTick(onwards);
-  }
-  yield deferred.promise;
-}
-
-// Check that when we sync we don't request a new token by default - our
-// test setup has configured the client with a valid token, and that token
-// should be used to form the cluster URL.
-add_task(function* test_single_token_fetch() {
-  _("Test a normal sync only fetches 1 token");
-
-  let numTokenFetches = 0;
-
-  function afterTokenFetch() {
-    numTokenFetches++;
-  }
-
-  // Set the cluster URL to an "old" version - this is to ensure we don't
-  // use that old cached version for the first sync but prefer the value
-  // we got from the token (and as above, we are also checking we don't grab
-  // a new token). If the test actually attempts to connect to this URL
-  // it will crash.
-  Service.clusterURL = "http://example.com/";
-
-  let server = yield prepareServer(afterTokenFetch);
-
-  do_check_false(Service.isLoggedIn, "not already logged in");
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED, "sync succeeded");
-  do_check_eq(numTokenFetches, 0, "didn't fetch a new token");
-  // A bit hacky, but given we know how prepareServer works we can deduce
-  // that clusterURL we expect.
-  let expectedClusterURL = server.baseURI + "1.1/johndoe/";
-  do_check_eq(Service.clusterURL, expectedClusterURL);
-  yield new Promise(resolve => server.stop(resolve));
-});
-
-add_task(function* test_momentary_401_engine() {
-  _("Test a failure for engine URLs that's resolved by reassignment.");
-  let server = yield prepareServer();
-  let john   = server.user("johndoe");
-
-  _("Enabling the Rotary engine.");
-  let engine = Service.engineManager.get("rotary");
-  engine.enabled = true;
-
-  // We need the server to be correctly set up prior to experimenting. Do this
-  // through a sync.
-  let global = {syncID: Service.syncID,
-                storageVersion: STORAGE_VERSION,
-                rotary: {version: engine.version,
-                         syncID:  engine.syncID}}
-  john.createCollection("meta").insert("global", global);
-
-  _("First sync to prepare server contents.");
-  Service.sync();
-
-  _("Setting up Rotary collection to 401.");
-  let rotary = john.createCollection("rotary");
-  let oldHandler = rotary.collectionHandler;
-  rotary.collectionHandler = handleReassign.bind(this, undefined);
-
-  // We want to verify that the clusterURL pref has been cleared after a 401
-  // inside a sync. Flag the Rotary engine to need syncing.
-  john.collection("rotary").timestamp += 1000;
-
-  function between() {
-    _("Undoing test changes.");
-    rotary.collectionHandler = oldHandler;
-
-    function onLoginStart() {
-      // lastSyncReassigned shouldn't be cleared until a sync has succeeded.
-      _("Ensuring that lastSyncReassigned is still set at next sync start.");
-      Svc.Obs.remove("weave:service:login:start", onLoginStart);
-      do_check_true(getReassigned());
-    }
-
-    _("Adding observer that lastSyncReassigned is still set on login.");
-    Svc.Obs.add("weave:service:login:start", onLoginStart);
-  }
-
-  yield syncAndExpectNodeReassignment(server,
-                                      "weave:service:sync:finish",
-                                      between,
-                                      "weave:service:sync:finish",
-                                      Service.storageURL + "rotary");
-});
-
-// This test ends up being a failing info fetch *after we're already logged in*.
-add_task(function* test_momentary_401_info_collections_loggedin() {
-  _("Test a failure for info/collections after login that's resolved by reassignment.");
-  let server = yield prepareServer();
-
-  _("First sync to prepare server contents.");
-  Service.sync();
-
-  _("Arrange for info/collections to return a 401.");
-  let oldHandler = server.toplevelHandlers.info;
-  server.toplevelHandlers.info = handleReassign;
-
-  function undo() {
-    _("Undoing test changes.");
-    server.toplevelHandlers.info = oldHandler;
-  }
-
-  do_check_true(Service.isLoggedIn, "already logged in");
-
-  yield syncAndExpectNodeReassignment(server,
-                                      "weave:service:sync:error",
-                                      undo,
-                                      "weave:service:sync:finish",
-                                      Service.infoURL);
-});
-
-// This test ends up being a failing info fetch *before we're logged in*.
-// In this case we expect to recover during the login phase - so the first
-// sync succeeds.
-add_task(function* test_momentary_401_info_collections_loggedout() {
-  _("Test a failure for info/collections before login that's resolved by reassignment.");
-
-  let oldHandler;
-  let sawTokenFetch = false;
-
-  function afterTokenFetch() {
-    // After a single token fetch, we undo our evil handleReassign hack, so
-    // the next /info request returns the collection instead of a 401
-    server.toplevelHandlers.info = oldHandler;
-    sawTokenFetch = true;
-  }
-
-  let server = yield prepareServer(afterTokenFetch);
-
-  // Return a 401 for the next /info request - it will be reset immediately
-  // after a new token is fetched.
-  oldHandler = server.toplevelHandlers.info
-  server.toplevelHandlers.info = handleReassign;
-
-  do_check_false(Service.isLoggedIn, "not already logged in");
-
-  Service.sync();
-  do_check_eq(Status.sync, SYNC_SUCCEEDED, "sync succeeded");
-  // sync was successful - check we grabbed a new token.
-  do_check_true(sawTokenFetch, "a new token was fetched by this test.")
-  // and we are done.
-  Service.startOver();
-  let deferred = Promise.defer();
-  server.stop(deferred.resolve);
-  yield deferred.promise;
-});
-
-// This test ends up being a failing meta/global fetch *after we're already logged in*.
-add_task(function* test_momentary_401_storage_loggedin() {
-  _("Test a failure for any storage URL after login that's resolved by" +
-    "reassignment.");
-  let server = yield prepareServer();
-
-  _("First sync to prepare server contents.");
-  Service.sync();
-
-  _("Arrange for meta/global to return a 401.");
-  let oldHandler = server.toplevelHandlers.storage;
-  server.toplevelHandlers.storage = handleReassign;
-
-  function undo() {
-    _("Undoing test changes.");
-    server.toplevelHandlers.storage = oldHandler;
-  }
-
-  do_check_true(Service.isLoggedIn, "already logged in");
-
-  yield syncAndExpectNodeReassignment(server,
-                                      "weave:service:sync:error",
-                                      undo,
-                                      "weave:service:sync:finish",
-                                      Service.storageURL + "meta/global");
-});
-
-// This test ends up being a failing meta/global fetch *before we've logged in*.
-add_task(function* test_momentary_401_storage_loggedout() {
-  _("Test a failure for any storage URL before login, not just engine parts. " +
-    "Resolved by reassignment.");
-  let server = yield prepareServer();
-
-  // Return a 401 for all storage requests.
-  let oldHandler = server.toplevelHandlers.storage;
-  server.toplevelHandlers.storage = handleReassign;
-
-  function undo() {
-    _("Undoing test changes.");
-    server.toplevelHandlers.storage = oldHandler;
-  }
-
-  do_check_false(Service.isLoggedIn, "already logged in");
-
-  yield syncAndExpectNodeReassignment(server,
-                                      "weave:service:login:error",
-                                      undo,
-                                      "weave:service:sync:finish",
-                                      Service.storageURL + "meta/global");
-});
+/* Any copyright is dedicated to the Public Domain.

+   http://creativecommons.org/publicdomain/zero/1.0/ */

+

+_("Test that node reassignment happens correctly using the FxA identity mgr.");

+// The node-reassignment logic is quite different for FxA than for the legacy

+// provider.  In particular, there's no special request necessary for

+// reassignment - it comes from the token server - so we need to ensure the

+// Fxa cluster manager grabs a new token.

+

+Cu.import("resource://gre/modules/Log.jsm");

+Cu.import("resource://services-common/rest.js");

+Cu.import("resource://services-sync/constants.js");

+Cu.import("resource://services-sync/service.js");

+Cu.import("resource://services-sync/status.js");

+Cu.import("resource://services-sync/util.js");

+Cu.import("resource://testing-common/services/sync/rotaryengine.js");

+Cu.import("resource://services-sync/browserid_identity.js");

+Cu.import("resource://testing-common/services/sync/utils.js");

+

+Service.engineManager.clear();

+

+function run_test() {

+  Log.repository.getLogger("Sync.AsyncResource").level = Log.Level.Trace;

+  Log.repository.getLogger("Sync.ErrorHandler").level  = Log.Level.Trace;

+  Log.repository.getLogger("Sync.Resource").level      = Log.Level.Trace;

+  Log.repository.getLogger("Sync.RESTRequest").level   = Log.Level.Trace;

+  Log.repository.getLogger("Sync.Service").level       = Log.Level.Trace;

+  Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;

+  initTestLogging();

+

+  Service.engineManager.register(RotaryEngine);

+

+  // Setup the FxA identity manager and cluster manager.

+  Status.__authManager = Service.identity = new BrowserIDManager();

+  Service._clusterManager = Service.identity.createClusterManager(Service);

+

+  // None of the failures in this file should result in a UI error.

+  function onUIError() {

+    do_throw("Errors should not be presented in the UI.");

+  }

+  Svc.Obs.add("weave:ui:login:error", onUIError);

+  Svc.Obs.add("weave:ui:sync:error", onUIError);

+

+  run_next_test();

+}

+

+

+// API-compatible with SyncServer handler. Bind `handler` to something to use

+// as a ServerCollection handler.

+function handleReassign(handler, req, resp) {

+  resp.setStatusLine(req.httpVersion, 401, "Node reassignment");

+  resp.setHeader("Content-Type", "application/json");

+  let reassignBody = JSON.stringify({error: "401inator in place"});

+  resp.bodyOutputStream.write(reassignBody, reassignBody.length);

+}

+

+let numTokenRequests = 0;

+

+function prepareServer(cbAfterTokenFetch) {

+  let config = makeIdentityConfig({username: "johndoe"});

+  let server = new SyncServer();

+  server.registerUser("johndoe");

+  server.start();

+

+  // Set the token endpoint for the initial token request that's done implicitly

+  // via configureIdentity.

+  config.fxaccount.token.endpoint = server.baseURI + "1.1/johndoe";

+  // And future token fetches will do magic around numReassigns.

+  let numReassigns = 0;

+  return configureIdentity(config).then(() => {

+    Service.identity._tokenServerClient = {

+      getTokenFromBrowserIDAssertion: function(uri, assertion, cb) {

+        // Build a new URL with trailing zeros for the SYNC_VERSION part - this

+        // will still be seen as equivalent by the test server, but different

+        // by sync itself.

+        numReassigns += 1;

+        let trailingZeros = new Array(numReassigns + 1).join('0');

+        let token = config.fxaccount.token;

+        token.endpoint = server.baseURI + "1.1" + trailingZeros + "/johndoe";

+        token.uid = config.username;

+        numTokenRequests += 1;

+        cb(null, token);

+        if (cbAfterTokenFetch) {

+          cbAfterTokenFetch();

+        }

+      },

+    };

+    Service.clusterURL = config.fxaccount.token.endpoint;

+    return server;

+  });

+}

+

+function getReassigned() {

+  try {

+    return Services.prefs.getBoolPref("services.sync.lastSyncReassigned");

+  } catch (ex if (ex.result == Cr.NS_ERROR_UNEXPECTED)) {

+    return false;

+  } catch (ex) {

+    do_throw("Got exception retrieving lastSyncReassigned: " +

+             Utils.exceptionStr(ex));

+  }

+}

+

+/**

+ * Make a test request to `url`, then watch the result of two syncs

+ * to ensure that a node request was made.

+ * Runs `between` between the two. This can be used to undo deliberate failure

+ * setup, detach observers, etc.

+ */

+function syncAndExpectNodeReassignment(server, firstNotification, between,

+                                       secondNotification, url) {

+  _("Starting syncAndExpectNodeReassignment\n");

+  let deferred = Promise.defer();

+  function onwards() {

+    let numTokenRequestsBefore;

+    function onFirstSync() {

+      _("First sync completed.");

+      Svc.Obs.remove(firstNotification, onFirstSync);

+      Svc.Obs.add(secondNotification, onSecondSync);

+

+      do_check_eq(Service.clusterURL, "");

+

+      // Track whether we fetched a new token.

+      numTokenRequestsBefore = numTokenRequests;

+

+      // Allow for tests to clean up error conditions.

+      between();

+    }

+    function onSecondSync() {

+      _("Second sync completed.");

+      Svc.Obs.remove(secondNotification, onSecondSync);

+      Service.scheduler.clearSyncTriggers();

+

+      // Make absolutely sure that any event listeners are done with their work

+      // before we proceed.

+      waitForZeroTimer(function () {

+        _("Second sync nextTick.");

+        do_check_eq(numTokenRequests, numTokenRequestsBefore + 1, "fetched a new token");

+        Service.startOver();

+        server.stop(deferred.resolve);

+      });

+    }

+

+    Svc.Obs.add(firstNotification, onFirstSync);

+    Service.sync();

+  }

+

+  // Make sure that it works!

+  _("Making request to " + url + " which should 401");

+  let request = new RESTRequest(url);

+  request.get(function () {

+    do_check_eq(request.response.status, 401);

+    Utils.nextTick(onwards);

+  });

+  yield deferred.promise;

+}

+

+add_task(function test_momentary_401_engine() {

+  _("Test a failure for engine URLs that's resolved by reassignment.");

+  let server = yield prepareServer();

+  let john   = server.user("johndoe");

+

+  _("Enabling the Rotary engine.");

+  let engine = Service.engineManager.get("rotary");

+  engine.enabled = true;

+

+  // We need the server to be correctly set up prior to experimenting. Do this

+  // through a sync.

+  let global = {syncID: Service.syncID,

+                storageVersion: STORAGE_VERSION,

+                rotary: {version: engine.version,

+                         syncID:  engine.syncID}}

+  john.createCollection("meta").insert("global", global);

+

+  _("First sync to prepare server contents.");

+  Service.sync();

+

+  _("Setting up Rotary collection to 401.");

+  let rotary = john.createCollection("rotary");

+  let oldHandler = rotary.collectionHandler;

+  rotary.collectionHandler = handleReassign.bind(this, undefined);

+

+  // We want to verify that the clusterURL pref has been cleared after a 401

+  // inside a sync. Flag the Rotary engine to need syncing.

+  john.collection("rotary").timestamp += 1000;

+

+  function between() {

+    _("Undoing test changes.");

+    rotary.collectionHandler = oldHandler;

+

+    function onLoginStart() {

+      // lastSyncReassigned shouldn't be cleared until a sync has succeeded.

+      _("Ensuring that lastSyncReassigned is still set at next sync start.");

+      Svc.Obs.remove("weave:service:login:start", onLoginStart);

+      do_check_true(getReassigned());

+    }

+

+    _("Adding observer that lastSyncReassigned is still set on login.");

+    Svc.Obs.add("weave:service:login:start", onLoginStart);

+  }

+

+  yield syncAndExpectNodeReassignment(server,

+                                      "weave:service:sync:finish",

+                                      between,

+                                      "weave:service:sync:finish",

+                                      Service.storageURL + "rotary");

+});

+

+// This test ends up being a failing info fetch *after we're already logged in*.

+add_task(function test_momentary_401_info_collections_loggedin() {

+  _("Test a failure for info/collections after login that's resolved by reassignment.");

+  let server = yield prepareServer();

+

+  _("First sync to prepare server contents.");

+  Service.sync();

+

+  _("Arrange for info/collections to return a 401.");

+  let oldHandler = server.toplevelHandlers.info;

+  server.toplevelHandlers.info = handleReassign;

+

+  function undo() {

+    _("Undoing test changes.");

+    server.toplevelHandlers.info = oldHandler;

+  }

+

+  do_check_true(Service.isLoggedIn, "already logged in");

+

+  yield syncAndExpectNodeReassignment(server,

+                                      "weave:service:sync:error",

+                                      undo,

+                                      "weave:service:sync:finish",

+                                      Service.infoURL);

+});

+

+// This test ends up being a failing info fetch *before we're logged in*.

+// In this case we expect to recover during the login phase - so the first

+// sync succeeds.

+add_task(function test_momentary_401_info_collections_loggedout() {

+  _("Test a failure for info/collections before login that's resolved by reassignment.");

+

+  let oldHandler;

+  let sawTokenFetch = false;

+

+  function afterTokenFetch() {

+    // After a single token fetch, we undo our evil handleReassign hack, so

+    // the next /info request returns the collection instead of a 401

+    server.toplevelHandlers.info = oldHandler;

+    sawTokenFetch = true;

+  }

+

+  let server = yield prepareServer(afterTokenFetch);

+

+  // Return a 401 for the next /info request - it will be reset immediately

+  // after a new token is fetched.

+  oldHandler = server.toplevelHandlers.info

+  server.toplevelHandlers.info = handleReassign;

+

+  do_check_false(Service.isLoggedIn, "not already logged in");

+

+  Service.sync();

+  do_check_eq(Status.sync, SYNC_SUCCEEDED, "sync succeeded");

+  // sync was successful - check we grabbed a new token.

+  do_check_true(sawTokenFetch, "a new token was fetched by this test.")

+  // and we are done.

+  Service.startOver();

+  let deferred = Promise.defer();

+  server.stop(deferred.resolve);

+  yield deferred.promise;

+});

+

+// This test ends up being a failing meta/global fetch *after we're already logged in*.

+add_task(function test_momentary_401_storage_loggedin() {

+  _("Test a failure for any storage URL after login that's resolved by" +

+    "reassignment.");

+  let server = yield prepareServer();

+

+  _("First sync to prepare server contents.");

+  Service.sync();

+

+  _("Arrange for meta/global to return a 401.");

+  let oldHandler = server.toplevelHandlers.storage;

+  server.toplevelHandlers.storage = handleReassign;

+

+  function undo() {

+    _("Undoing test changes.");

+    server.toplevelHandlers.storage = oldHandler;

+  }

+

+  do_check_true(Service.isLoggedIn, "already logged in");

+

+  yield syncAndExpectNodeReassignment(server,

+                                      "weave:service:sync:error",

+                                      undo,

+                                      "weave:service:sync:finish",

+                                      Service.storageURL + "meta/global");

+});

+

+// This test ends up being a failing meta/global fetch *before we've logged in*.

+add_task(function test_momentary_401_storage_loggedout() {

+  _("Test a failure for any storage URL before login, not just engine parts. " +

+    "Resolved by reassignment.");

+  let server = yield prepareServer();

+

+  // Return a 401 for all storage requests.

+  let oldHandler = server.toplevelHandlers.storage;

+  server.toplevelHandlers.storage = handleReassign;

+

+  function undo() {

+    _("Undoing test changes.");

+    server.toplevelHandlers.storage = oldHandler;

+  }

+

+  do_check_false(Service.isLoggedIn, "already logged in");

+

+  yield syncAndExpectNodeReassignment(server,

+                                      "weave:service:login:error",

+                                      undo,

+                                      "weave:service:sync:finish",

+                                      Service.storageURL + "meta/global");

+});

+

diff --git a/services/sync/tests/unit/test_fxa_service_cluster.js b/services/sync/tests/unit/test_fxa_service_cluster.js
index b4f83a7fe..f6f97184a 100644
--- a/services/sync/tests/unit/test_fxa_service_cluster.js
+++ b/services/sync/tests/unit/test_fxa_service_cluster.js
@@ -1,68 +1,68 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/fxa_utils.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-
-add_task(function* test_findCluster() {
-  _("Test FxA _findCluster()");
-
-  _("_findCluster() throws on 500 errors.");
-  initializeIdentityWithTokenServerResponse({
-    status: 500,
-    headers: [],
-    body: "",
-  });
-
-  yield Service.identity.initializeWithCurrentIdentity();
-  yield Assert.rejects(Service.identity.whenReadyToAuthenticate.promise,
-                       "should reject due to 500");
-
-  Assert.throws(function() {
-    Service._clusterManager._findCluster();
-  });
-
-  _("_findCluster() returns null on authentication errors.");
-  initializeIdentityWithTokenServerResponse({
-    status: 401,
-    headers: {"content-type": "application/json"},
-    body: "{}",
-  });
-
-  yield Service.identity.initializeWithCurrentIdentity();
-  yield Assert.rejects(Service.identity.whenReadyToAuthenticate.promise,
-                       "should reject due to 401");
-
-  cluster = Service._clusterManager._findCluster();
-  Assert.strictEqual(cluster, null);
-
-  _("_findCluster() works with correct tokenserver response.");
-  let endpoint = "http://example.com/something";
-  initializeIdentityWithTokenServerResponse({
-    status: 200,
-    headers: {"content-type": "application/json"},
-    body:
-      JSON.stringify({
-        api_endpoint: endpoint,
-        duration: 300,
-        id: "id",
-        key: "key",
-        uid: "uid",
-      })
-  });
-
-  yield Service.identity.initializeWithCurrentIdentity();
-  yield Service.identity.whenReadyToAuthenticate.promise;
-  cluster = Service._clusterManager._findCluster();
-  // The cluster manager ensures a trailing "/"
-  Assert.strictEqual(cluster, endpoint + "/");
-
-  Svc.Prefs.resetBranch("");
-});
-
-function run_test() {
-  initTestLogging();
-  run_next_test();
-}
+/* Any copyright is dedicated to the Public Domain.

+   http://creativecommons.org/publicdomain/zero/1.0/ */

+

+Cu.import("resource://services-sync/service.js");

+Cu.import("resource://services-sync/util.js");

+Cu.import("resource://testing-common/services/sync/fxa_utils.js");

+Cu.import("resource://testing-common/services/sync/utils.js");

+

+add_task(function test_findCluster() {

+  _("Test FxA _findCluster()");

+

+  _("_findCluster() throws on 500 errors.");

+  initializeIdentityWithTokenServerResponse({

+    status: 500,

+    headers: [],

+    body: "",

+  });

+

+  yield Service.identity.initializeWithCurrentIdentity();

+  yield Assert.rejects(Service.identity.whenReadyToAuthenticate.promise,

+                       "should reject due to 500");

+

+  Assert.throws(function() {

+    Service._clusterManager._findCluster();

+  });

+

+  _("_findCluster() returns null on authentication errors.");

+  initializeIdentityWithTokenServerResponse({

+    status: 401,

+    headers: {"content-type": "application/json"},

+    body: "{}",

+  });

+

+  yield Service.identity.initializeWithCurrentIdentity();

+  yield Assert.rejects(Service.identity.whenReadyToAuthenticate.promise,

+                       "should reject due to 401");

+

+  cluster = Service._clusterManager._findCluster();

+  Assert.strictEqual(cluster, null);

+

+  _("_findCluster() works with correct tokenserver response.");

+  let endpoint = "http://example.com/something";

+  initializeIdentityWithTokenServerResponse({

+    status: 200,

+    headers: {"content-type": "application/json"},

+    body:

+      JSON.stringify({

+        api_endpoint: endpoint,

+        duration: 300,

+        id: "id",

+        key: "key",

+        uid: "uid",

+      })

+  });

+

+  yield Service.identity.initializeWithCurrentIdentity();

+  yield Service.identity.whenReadyToAuthenticate.promise;

+  cluster = Service._clusterManager._findCluster();

+  // The cluster manager ensures a trailing "/"

+  Assert.strictEqual(cluster, endpoint + "/");

+

+  Svc.Prefs.resetBranch("");

+});

+

+function run_test() {

+  initTestLogging();

+  run_next_test();

+}

diff --git a/services/sync/tests/unit/test_fxa_startOver.js b/services/sync/tests/unit/test_fxa_startOver.js
index 629379648..e27d86ea0 100644
--- a/services/sync/tests/unit/test_fxa_startOver.js
+++ b/services/sync/tests/unit/test_fxa_startOver.js
@@ -1,63 +1,63 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://services-sync/identity.js");
-Cu.import("resource://services-sync/browserid_identity.js");
-Cu.import("resource://services-sync/service.js");
-
-function run_test() {
-  initTestLogging("Trace");
-  run_next_test();
-}
-
-add_task(function* test_startover() {
-  let oldValue = Services.prefs.getBoolPref("services.sync-testing.startOverKeepIdentity", true);
-  Services.prefs.setBoolPref("services.sync-testing.startOverKeepIdentity", false);
-
-  ensureLegacyIdentityManager();
-  yield configureIdentity({username: "johndoe"});
-
-  // The boolean flag on the xpcom service should reflect a legacy provider.
-  let xps = Cc["@mozilla.org/weave/service;1"]
-            .getService(Components.interfaces.nsISupports)
-            .wrappedJSObject;
-  do_check_false(xps.fxAccountsEnabled);
-
-  // we expect the "legacy" provider (but can't instanceof that, as BrowserIDManager
-  // extends it)
-  do_check_false(Service.identity instanceof BrowserIDManager);
-
-  Service.serverURL = "https://localhost/";
-  Service.clusterURL = Service.serverURL;
-
-  Service.login();
-  // We should have a cluster URL
-  do_check_true(Service.clusterURL.length > 0);
-
-  // remember some stuff so we can reset it after.
-  let oldIdentity = Service.identity;
-  let oldClusterManager = Service._clusterManager;
-  let deferred = Promise.defer();
-  Services.obs.addObserver(function observeStartOverFinished() {
-    Services.obs.removeObserver(observeStartOverFinished, "weave:service:start-over:finish");
-    deferred.resolve();
-  }, "weave:service:start-over:finish", false);
-
-  Service.startOver();
-  yield deferred.promise; // wait for the observer to fire.
-
-  // the xpcom service should indicate FxA is enabled.
-  do_check_true(xps.fxAccountsEnabled);
-  // should have swapped identities.
-  do_check_true(Service.identity instanceof BrowserIDManager);
-  // should have clobbered the cluster URL
-  do_check_eq(Service.clusterURL, "");
-
-  // we should have thrown away the old identity provider and cluster manager.
-  do_check_neq(oldIdentity, Service.identity);
-  do_check_neq(oldClusterManager, Service._clusterManager);
-
-  // reset the world.
-  Services.prefs.setBoolPref("services.sync-testing.startOverKeepIdentity", oldValue);
-});
+/* Any copyright is dedicated to the Public Domain.

+ * http://creativecommons.org/publicdomain/zero/1.0/ */

+

+Cu.import("resource://testing-common/services/sync/utils.js");

+Cu.import("resource://services-sync/identity.js");

+Cu.import("resource://services-sync/browserid_identity.js");

+Cu.import("resource://services-sync/service.js");

+

+function run_test() {

+  initTestLogging("Trace");

+  run_next_test();

+}

+

+add_task(function* test_startover() {

+  let oldValue = Services.prefs.getBoolPref("services.sync-testing.startOverKeepIdentity", true);

+  Services.prefs.setBoolPref("services.sync-testing.startOverKeepIdentity", false);

+

+  ensureLegacyIdentityManager();

+  yield configureIdentity({username: "johndoe"});

+

+  // The boolean flag on the xpcom service should reflect a legacy provider.

+  let xps = Cc["@mozilla.org/weave/service;1"]

+            .getService(Components.interfaces.nsISupports)

+            .wrappedJSObject;

+  do_check_false(xps.fxAccountsEnabled);

+

+  // we expect the "legacy" provider (but can't instanceof that, as BrowserIDManager

+  // extends it)

+  do_check_false(Service.identity instanceof BrowserIDManager);

+

+  Service.serverURL = "https://localhost/";

+  Service.clusterURL = Service.serverURL;

+

+  Service.login();

+  // We should have a cluster URL

+  do_check_true(Service.clusterURL.length > 0);

+

+  // remember some stuff so we can reset it after.

+  let oldIdentity = Service.identity;

+  let oldClusterManager = Service._clusterManager;

+  let deferred = Promise.defer();

+  Services.obs.addObserver(function observeStartOverFinished() {

+    Services.obs.removeObserver(observeStartOverFinished, "weave:service:start-over:finish");

+    deferred.resolve();

+  }, "weave:service:start-over:finish", false);

+

+  Service.startOver();

+  yield deferred.promise; // wait for the observer to fire.

+

+  // the xpcom service should indicate FxA is enabled.

+  do_check_true(xps.fxAccountsEnabled);

+  // should have swapped identities.

+  do_check_true(Service.identity instanceof BrowserIDManager);

+  // should have clobbered the cluster URL

+  do_check_eq(Service.clusterURL, "");

+

+  // we should have thrown away the old identity provider and cluster manager.

+  do_check_neq(oldIdentity, Service.identity);

+  do_check_neq(oldClusterManager, Service._clusterManager);

+

+  // reset the world.

+  Services.prefs.setBoolPref("services.sync-testing.startOverKeepIdentity", oldValue);

+});

diff --git a/services/sync/tests/unit/test_history_store.js b/services/sync/tests/unit/test_history_store.js
index 207b621e0..2381f103d 100644
--- a/services/sync/tests/unit/test_history_store.js
+++ b/services/sync/tests/unit/test_history_store.js
@@ -68,12 +68,12 @@ function ensureThrows(func) {
   };
 }
 
-var store = new HistoryEngine(Service)._store;
+let store = new HistoryEngine(Service)._store;
 function applyEnsureNoFailures(records) {
   do_check_eq(store.applyIncomingBatch(records).length, 0);
 }
 
-var fxuri, fxguid, tburi, tbguid;
+let fxuri, fxguid, tburi, tbguid;
 
 function run_test() {
   initTestLogging("Trace");
@@ -189,8 +189,8 @@ add_test(function test_invalid_records() {
                               .DBConnection;
   let stmt = connection.createAsyncStatement(
     "INSERT INTO moz_places "
-  + "(url, url_hash, title, rev_host, visit_count, last_visit_date) "
-  + "VALUES ('invalid-uri', hash('invalid-uri'), 'Invalid URI', '.', 1, " + TIMESTAMP3 + ")"
+  + "(url, title, rev_host, visit_count, last_visit_date) "
+  + "VALUES ('invalid-uri', 'Invalid URI', '.', 1, " + TIMESTAMP3 + ")"
   );
   Async.querySpinningly(stmt);
   stmt.finalize();
@@ -198,7 +198,7 @@ add_test(function test_invalid_records() {
   stmt = connection.createAsyncStatement(
     "INSERT INTO moz_historyvisits "
   + "(place_id, visit_date, visit_type, session) "
-  + "VALUES ((SELECT id FROM moz_places WHERE url_hash = hash('invalid-uri') AND url = 'invalid-uri'), "
+  + "VALUES ((SELECT id FROM moz_places WHERE url = 'invalid-uri'), "
   + TIMESTAMP3 + ", " + Ci.nsINavHistoryService.TRANSITION_TYPED + ", 1)"
   );
   Async.querySpinningly(stmt);
@@ -226,7 +226,7 @@ add_test(function test_invalid_records() {
                type: Ci.nsINavHistoryService.TRANSITION_EMBED}]}
   ]);
 
-  _("Make sure we handle records with invalid visit codes or visit dates, gracefully ignoring those visits.");
+  _("Make sure we report records with invalid visits, gracefully handle non-integer dates.");
   let no_date_visit_guid = Utils.makeGUID();
   let no_type_visit_guid = Utils.makeGUID();
   let invalid_type_visit_guid = Utils.makeGUID();
@@ -235,11 +235,11 @@ add_test(function test_invalid_records() {
     {id: no_date_visit_guid,
      histUri: "http://no.date.visit/",
      title: "Visit has no date",
-     visits: [{type: Ci.nsINavHistoryService.TRANSITION_EMBED}]},
+     visits: [{date: TIMESTAMP3}]},
     {id: no_type_visit_guid,
      histUri: "http://no.type.visit/",
      title: "Visit has no type",
-     visits: [{date: TIMESTAMP3}]},
+     visits: [{type: Ci.nsINavHistoryService.TRANSITION_EMBED}]},
     {id: invalid_type_visit_guid,
      histUri: "http://invalid.type.visit/",
      title: "Visit has invalid type",
@@ -251,7 +251,14 @@ add_test(function test_invalid_records() {
      visits: [{date: 1234.567,
                type: Ci.nsINavHistoryService.TRANSITION_EMBED}]}
   ]);
-  do_check_eq(failed.length, 0);
+  do_check_eq(failed.length, 3);
+  failed.sort();
+  let expected = [no_date_visit_guid,
+                  no_type_visit_guid,
+                  invalid_type_visit_guid].sort();
+  for (let i = 0; i < expected.length; i++) {
+    do_check_eq(failed[i], expected[i]);
+  }
 
   _("Make sure we handle records with javascript: URLs gracefully.");
   applyEnsureNoFailures([
diff --git a/services/sync/tests/unit/test_history_tracker.js b/services/sync/tests/unit/test_history_tracker.js
index 5ed022fb0..ca1090b79 100644
--- a/services/sync/tests/unit/test_history_tracker.js
+++ b/services/sync/tests/unit/test_history_tracker.js
@@ -22,13 +22,13 @@ function onScoreUpdated(callback) {
 
 Service.engineManager.clear();
 Service.engineManager.register(HistoryEngine);
-var engine = Service.engineManager.get("history");
-var tracker = engine._tracker;
+let engine = Service.engineManager.get("history");
+let tracker = engine._tracker;
 
 // Don't write out by default.
 tracker.persistChangedIDs = false;
 
-var _counter = 0;
+let _counter = 0;
 function addVisit() {
   let uriString = "http://getfirefox.com/" + _counter++;
   let uri = Utils.makeURI(uriString);
diff --git a/services/sync/tests/unit/test_hmac_error.js b/services/sync/tests/unit/test_hmac_error.js
index 272c0de47..e41ff3797 100644
--- a/services/sync/tests/unit/test_hmac_error.js
+++ b/services/sync/tests/unit/test_hmac_error.js
@@ -8,7 +8,7 @@ Cu.import("resource://testing-common/services/sync/rotaryengine.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
 // Track HMAC error counts.
-var hmacErrorCount = 0;
+let hmacErrorCount = 0;
 (function () {
   let hHE = Service.handleHMACEvent;
   Service.handleHMACEvent = function () {
@@ -49,7 +49,7 @@ function shared_setup() {
   return [engine, rotaryColl, clientsColl, keysWBO, global];
 }
 
-add_task(function *hmac_error_during_404() {
+add_test(function hmac_error_during_404() {
   _("Attempt to replicate the HMAC error setup.");
   let [engine, rotaryColl, clientsColl, keysWBO, global] = shared_setup();
 
@@ -83,14 +83,13 @@ add_task(function *hmac_error_during_404() {
 
   try {
     _("Syncing.");
-    yield sync_and_validate_telem();
-
+    Service.sync();
     _("Partially resetting client, as if after a restart, and forcing redownload.");
     Service.collectionKeys.clear();
     engine.lastSync = 0;        // So that we redownload records.
     key404Counter = 1;
     _("---------------------------");
-    yield sync_and_validate_telem();
+    Service.sync();
     _("---------------------------");
 
     // Two rotary items, one client record... no errors.
@@ -98,7 +97,7 @@ add_task(function *hmac_error_during_404() {
   } finally {
     Svc.Prefs.resetBranch("");
     Service.recordManager.clearCache();
-    yield new Promise(resolve => server.stop(resolve));
+    server.stop(run_next_test);
   }
 });
 
diff --git a/services/sync/tests/unit/test_identity_manager.js b/services/sync/tests/unit/test_identity_manager.js
index 1ac198ade..97dace95f 100644
--- a/services/sync/tests/unit/test_identity_manager.js
+++ b/services/sync/tests/unit/test_identity_manager.js
@@ -5,7 +5,7 @@ Cu.import("resource://services-sync/constants.js");
 Cu.import("resource://services-sync/identity.js");
 Cu.import("resource://services-sync/util.js");
 
-var identity = new IdentityManager();
+let identity = new IdentityManager();
 
 function run_test() {
   initTestLogging("Trace");
diff --git a/services/sync/tests/unit/test_interval_triggers.js b/services/sync/tests/unit/test_interval_triggers.js
index eca5ec289..0f355e636 100644
--- a/services/sync/tests/unit/test_interval_triggers.js
+++ b/services/sync/tests/unit/test_interval_triggers.js
@@ -10,13 +10,8 @@ Cu.import("resource://testing-common/services/sync/utils.js");
 Svc.DefaultPrefs.set("registerEngines", "");
 Cu.import("resource://services-sync/service.js");
 
-var scheduler = Service.scheduler;
-var clientsEngine = Service.clientsEngine;
-
-// Don't remove stale clients when syncing. This is a test-only workaround
-// that lets us add clients directly to the store, without losing them on
-// the next sync.
-clientsEngine._removeRemoteClient = id => {};
+let scheduler = Service.scheduler;
+let clientsEngine = Service.clientsEngine;
 
 function promiseStopServer(server) {
   let deferred = Promise.defer();
@@ -46,7 +41,7 @@ function sync_httpd_setup() {
   });
 }
 
-function* setUp(server) {
+function setUp(server) {
   yield configureIdentity({username: "johndoe"});
   Service.serverURL = server.baseURI + "/";
   Service.clusterURL = server.baseURI + "/";
@@ -65,7 +60,7 @@ function run_test() {
   run_next_test();
 }
 
-add_identity_test(this, function* test_successful_sync_adjustSyncInterval() {
+add_identity_test(this, function test_successful_sync_adjustSyncInterval() {
   _("Test successful sync calling adjustSyncInterval");
   let syncSuccesses = 0;
   function onSyncFinish() {
@@ -164,7 +159,7 @@ add_identity_test(this, function* test_successful_sync_adjustSyncInterval() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_unsuccessful_sync_adjustSyncInterval() {
+add_identity_test(this, function test_unsuccessful_sync_adjustSyncInterval() {
   _("Test unsuccessful sync calling adjustSyncInterval");
 
   let syncFailures = 0;
@@ -269,7 +264,7 @@ add_identity_test(this, function* test_unsuccessful_sync_adjustSyncInterval() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_back_triggers_sync() {
+add_identity_test(this, function test_back_triggers_sync() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -301,7 +296,7 @@ add_identity_test(this, function* test_back_triggers_sync() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_adjust_interval_on_sync_error() {
+add_identity_test(this, function test_adjust_interval_on_sync_error() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -332,7 +327,7 @@ add_identity_test(this, function* test_adjust_interval_on_sync_error() {
   yield promiseStopServer(server);
 });
 
-add_identity_test(this, function* test_bug671378_scenario() {
+add_identity_test(this, function test_bug671378_scenario() {
   // Test scenario similar to bug 671378. This bug appeared when a score
   // update occurred that wasn't large enough to trigger a sync so
   // scheduleNextSync() was called without a time interval parameter,
diff --git a/services/sync/tests/unit/test_jpakeclient.js b/services/sync/tests/unit/test_jpakeclient.js
index 783edb460..ff13c5716 100644
--- a/services/sync/tests/unit/test_jpakeclient.js
+++ b/services/sync/tests/unit/test_jpakeclient.js
@@ -38,8 +38,8 @@ function new_channel() {
   return cid;
 }
 
-var server;
-var channels = {};  // Map channel -> ServerChannel object
+let server;
+let channels = {};  // Map channel -> ServerChannel object
 function server_new_channel(request, response) {
   check_headers(request);
   let cid = new_channel();
@@ -48,7 +48,7 @@ function server_new_channel(request, response) {
   response.bodyOutputStream.write(body, body.length);
 }
 
-var error_report;
+let error_report;
 function server_report(request, response) {
   check_headers(request);
 
@@ -68,7 +68,7 @@ function server_report(request, response) {
 }
 
 // Hook for test code.
-var hooks = {};
+let hooks = {};
 function initHooks() {
   hooks.onGET = function onGET(request) {};
 }
@@ -146,7 +146,7 @@ ServerChannel.prototype = {
 /**
  * Controller that throws for everything.
  */
-var BaseController = {
+let BaseController = {
   displayPIN: function displayPIN() {
     do_throw("displayPIN() shouldn't have been called!");
   },
@@ -369,7 +369,7 @@ add_test(function test_wrongPIN() {
     displayPIN: function displayPIN(pin) {
       this.cid = pin.slice(JPAKE_LENGTH_SECRET);
       let secret = pin.slice(0, JPAKE_LENGTH_SECRET);
-      secret = Array.prototype.slice.call(secret).reverse().join("");
+      secret = [char for each (char in secret)].reverse().join("");
       let new_pin = secret + this.cid;
       _("Received PIN " + pin + ", but I'm entering " + new_pin);
 
diff --git a/services/sync/tests/unit/test_keys.js b/services/sync/tests/unit/test_keys.js
index a828b619c..6a2fdd027 100644
--- a/services/sync/tests/unit/test_keys.js
+++ b/services/sync/tests/unit/test_keys.js
@@ -7,7 +7,7 @@ Cu.import("resource://services-sync/keys.js");
 Cu.import("resource://services-sync/record.js");
 Cu.import("resource://services-sync/util.js");
 
-var collectionKeys = new CollectionKeyManager();
+let collectionKeys = new CollectionKeyManager();
 
 function sha256HMAC(message, key) {
   let h = Utils.makeHMACHasher(Ci.nsICryptoHMAC.SHA256, key);
diff --git a/services/sync/tests/unit/test_load_modules.js b/services/sync/tests/unit/test_load_modules.js
index 0b222520c..4f561bae6 100644
--- a/services/sync/tests/unit/test_load_modules.js
+++ b/services/sync/tests/unit/test_load_modules.js
@@ -9,7 +9,6 @@ const modules = [
   "engines/addons.js",
   "engines/bookmarks.js",
   "engines/clients.js",
-  "engines/extension-storage.js",
   "engines/forms.js",
   "engines/history.js",
   "engines/passwords.js",
@@ -20,6 +19,7 @@ const modules = [
   "jpakeclient.js",
   "keys.js",
   "main.js",
+  "notifications.js",
   "policies.js",
   "record.js",
   "resource.js",
diff --git a/services/sync/tests/unit/test_node_reassignment.js b/services/sync/tests/unit/test_node_reassignment.js
index 66d21b6f1..7fe5ed7ed 100644
--- a/services/sync/tests/unit/test_node_reassignment.js
+++ b/services/sync/tests/unit/test_node_reassignment.js
@@ -23,7 +23,7 @@ function run_test() {
   Log.repository.getLogger("Sync.Service").level       = Log.Level.Trace;
   Log.repository.getLogger("Sync.SyncScheduler").level = Log.Level.Trace;
   initTestLogging();
-  validate_all_future_pings();
+
   ensureLegacyIdentityManager();
 
   Service.engineManager.register(RotaryEngine);
@@ -92,12 +92,11 @@ function prepareServer() {
 function getReassigned() {
   try {
     return Services.prefs.getBoolPref("services.sync.lastSyncReassigned");
+  } catch (ex if (ex.result == Cr.NS_ERROR_UNEXPECTED)) {
+    return false;
   } catch (ex) {
-    if (ex.result == Cr.NS_ERROR_UNEXPECTED) {
-      return false;
-    }
     do_throw("Got exception retrieving lastSyncReassigned: " +
-             Log.exceptionStr(ex));
+             Utils.exceptionStr(ex));
   }
 }
 
@@ -107,7 +106,7 @@ function getReassigned() {
  * Runs `between` between the two. This can be used to undo deliberate failure
  * setup, detach observers, etc.
  */
-function* syncAndExpectNodeReassignment(server, firstNotification, between,
+function syncAndExpectNodeReassignment(server, firstNotification, between,
                                        secondNotification, url) {
   let deferred = Promise.defer();
   function onwards() {
@@ -161,7 +160,7 @@ function* syncAndExpectNodeReassignment(server, firstNotification, between,
   yield deferred.promise;
 }
 
-add_task(function* test_momentary_401_engine() {
+add_task(function test_momentary_401_engine() {
   _("Test a failure for engine URLs that's resolved by reassignment.");
   let server = yield prepareServer();
   let john   = server.user("johndoe");
@@ -213,7 +212,7 @@ add_task(function* test_momentary_401_engine() {
 });
 
 // This test ends up being a failing fetch *after we're already logged in*.
-add_task(function* test_momentary_401_info_collections() {
+add_task(function test_momentary_401_info_collections() {
   _("Test a failure for info/collections that's resolved by reassignment.");
   let server = yield prepareServer();
 
@@ -236,7 +235,7 @@ add_task(function* test_momentary_401_info_collections() {
                                       Service.infoURL);
 });
 
-add_task(function* test_momentary_401_storage_loggedin() {
+add_task(function test_momentary_401_storage_loggedin() {
   _("Test a failure for any storage URL, not just engine parts. " +
     "Resolved by reassignment.");
   let server = yield prepareServer();
@@ -261,7 +260,7 @@ add_task(function* test_momentary_401_storage_loggedin() {
                                       Service.storageURL + "meta/global");
 });
 
-add_task(function* test_momentary_401_storage_loggedout() {
+add_task(function test_momentary_401_storage_loggedout() {
   _("Test a failure for any storage URL, not just engine parts. " +
     "Resolved by reassignment.");
   let server = yield prepareServer();
@@ -283,7 +282,7 @@ add_task(function* test_momentary_401_storage_loggedout() {
                                       Service.storageURL + "meta/global");
 });
 
-add_task(function* test_loop_avoidance_storage() {
+add_task(function test_loop_avoidance_storage() {
   _("Test that a repeated failure doesn't result in a sync loop " +
     "if node reassignment cannot resolve the failure.");
 
@@ -383,7 +382,7 @@ add_task(function* test_loop_avoidance_storage() {
   yield deferred.promise;
 });
 
-add_task(function* test_loop_avoidance_engine() {
+add_task(function test_loop_avoidance_engine() {
   _("Test that a repeated 401 in an engine doesn't result in a sync loop " +
     "if node reassignment cannot resolve the failure.");
   let server = yield prepareServer();
diff --git a/services/sync/tests/unit/test_notifications.js b/services/sync/tests/unit/test_notifications.js
new file mode 100644
index 000000000..9d6da1d2d
--- /dev/null
+++ b/services/sync/tests/unit/test_notifications.js
@@ -0,0 +1,32 @@
+Cu.import("resource://services-sync/notifications.js");
+
+function run_test() {
+  var logStats = initTestLogging("Info");
+
+  var blah = 0;
+
+  function callback(i) {
+    blah = i;
+  }
+
+  let button = new NotificationButton("label", "accessKey", callback);
+
+  button.callback(5);
+
+  do_check_eq(blah, 5);
+  do_check_eq(logStats.errorsLogged, 0);
+
+  function badCallback() {
+    throw new Error("oops");
+  }
+
+  button = new NotificationButton("label", "accessKey", badCallback);
+
+  try {
+    button.callback();
+  } catch (e) {
+    do_check_eq(e.message, "oops");
+  }
+
+  do_check_eq(logStats.errorsLogged, 1);
+}
diff --git a/services/sync/tests/unit/test_password_store.js b/services/sync/tests/unit/test_password_store.js
index d232d5e63..c56901d79 100644
--- a/services/sync/tests/unit/test_password_store.js
+++ b/services/sync/tests/unit/test_password_store.js
@@ -5,137 +5,6 @@ Cu.import("resource://services-sync/engines/passwords.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
-
-function checkRecord(name, record, expectedCount, timeCreated,
-                     expectedTimeCreated, timePasswordChanged,
-                     expectedTimePasswordChanged, recordIsUpdated) {
-  let engine = Service.engineManager.get("passwords");
-  let store = engine._store;
-
-  let count = {};
-  let logins = Services.logins.findLogins(count, record.hostname,
-                                          record.formSubmitURL, null);
-
-  _("Record" + name + ":" + JSON.stringify(logins));
-  _("Count" + name + ":" +  count.value);
-
-  do_check_eq(count.value, expectedCount);
-
-  if (expectedCount > 0) {
-    do_check_true(!!store.getAllIDs()[record.id]);
-    let stored_record = logins[0].QueryInterface(Ci.nsILoginMetaInfo);
-
-    if (timeCreated !== undefined) {
-      do_check_eq(stored_record.timeCreated, expectedTimeCreated);
-    }
-
-    if (timePasswordChanged !== undefined) {
-      if (recordIsUpdated) {
-        do_check_true(stored_record.timePasswordChanged >= expectedTimePasswordChanged);
-      } else {
-        do_check_eq(stored_record.timePasswordChanged, expectedTimePasswordChanged);
-      }
-      return stored_record.timePasswordChanged;
-    }
-  } else {
-    do_check_true(!store.getAllIDs()[record.id]);
-  }
-}
-
-
-function changePassword(name, hostname, password, expectedCount, timeCreated,
-                        expectedTimeCreated, timePasswordChanged,
-                        expectedTimePasswordChanged, insert, recordIsUpdated) {
-
-  const BOGUS_GUID = "zzzzzz" + hostname;
-
-  let record = {id: BOGUS_GUID,
-                  hostname: hostname,
-                  formSubmitURL: hostname,
-                  username: "john",
-                  password: password,
-                  usernameField: "username",
-                  passwordField: "password"};
-
-  if (timeCreated !== undefined) {
-    record.timeCreated = timeCreated;
-  }
-
-  if (timePasswordChanged !== undefined) {
-    record.timePasswordChanged = timePasswordChanged;
-  }
-
-
-  let engine = Service.engineManager.get("passwords");
-  let store = engine._store;
-
-  if (insert) {
-    do_check_eq(store.applyIncomingBatch([record]).length, 0);
-  }
-
-  return checkRecord(name, record, expectedCount, timeCreated,
-                     expectedTimeCreated, timePasswordChanged,
-                     expectedTimePasswordChanged, recordIsUpdated);
-
-}
-
-
-function test_apply_records_with_times(hostname, timeCreated, timePasswordChanged) {
-  // The following record is going to be inserted in the store and it needs
-  // to be found there. Then its timestamps are going to be compared to
-  // the expected values.
-  changePassword(" ", hostname, "password", 1, timeCreated, timeCreated,
-                 timePasswordChanged, timePasswordChanged, true);
-}
-
-
-function test_apply_multiple_records_with_times() {
-  // The following records are going to be inserted in the store and they need
-  // to be found there. Then their timestamps are going to be compared to
-  // the expected values.
-  changePassword("A", "http://foo.a.com", "password", 1, undefined, undefined,
-                 undefined, undefined, true);
-  changePassword("B", "http://foo.b.com", "password", 1, 1000, 1000, undefined,
-                 undefined, true);
-  changePassword("C", "http://foo.c.com", "password", 1, undefined, undefined,
-                 1000, 1000, true);
-  changePassword("D", "http://foo.d.com", "password", 1, 1000, 1000, 1000,
-                 1000, true);
-
-  // The following records are not going to be inserted in the store and they
-  // are not going to be found there.
-  changePassword("NotInStoreA", "http://foo.aaaa.com", "password", 0,
-                 undefined, undefined, undefined, undefined, false);
-  changePassword("NotInStoreB", "http://foo.bbbb.com", "password", 0, 1000,
-                 1000, undefined, undefined, false);
-  changePassword("NotInStoreC", "http://foo.cccc.com", "password", 0,
-                 undefined, undefined, 1000, 1000, false);
-  changePassword("NotInStoreD", "http://foo.dddd.com", "password", 0, 1000,
-                 1000, 1000, 1000, false);
-}
-
-
-function test_apply_same_record_with_different_times() {
-  // The following record is going to be inserted multiple times in the store
-  // and it needs to be found there. Then its timestamps are going to be
-  // compared to the expected values.
-  var timePasswordChanged = 100;
-  timePasswordChanged = changePassword("A", "http://a.tn", "password", 1, 100,
-                                       100, 100, timePasswordChanged, true);
-  timePasswordChanged = changePassword("A", "http://a.tn", "password", 1, 100,
-                                       100, 800, timePasswordChanged, true,
-                                       true);
-  timePasswordChanged = changePassword("A", "http://a.tn", "password", 1, 500,
-                                       100, 800, timePasswordChanged, true,
-                                       true);
-  timePasswordChanged = changePassword("A", "http://a.tn", "password2", 1, 500,
-                                       100,  1536213005222, timePasswordChanged,
-                                       true, true);
-  timePasswordChanged = changePassword("A", "http://a.tn", "password2", 1, 500,
-                                       100, 800, timePasswordChanged, true, true);
-}
-
-
 function run_test() {
   initTestLogging("Trace");
   Log.repository.getLogger("Sync.Engine.Passwords").level = Log.Level.Trace;
@@ -161,9 +30,12 @@ function run_test() {
 
   let engine = Service.engineManager.get("passwords");
   let store = engine._store;
+  function applyEnsureNoFailures(records) {
+    do_check_eq(store.applyIncomingBatch(records).length, 0);
+  }
 
   try {
-    do_check_eq(store.applyIncomingBatch([recordA, recordB]).length, 0);
+    applyEnsureNoFailures([recordA, recordB]);
 
     // Only the good record makes it to Services.logins.
     let badCount = {};
@@ -183,17 +55,7 @@ function run_test() {
 
     do_check_true(!!store.getAllIDs()[BOGUS_GUID_B]);
     do_check_true(!store.getAllIDs()[BOGUS_GUID_A]);
-
-    test_apply_records_with_times("http://afoo.baz.com", undefined, undefined);
-    test_apply_records_with_times("http://bfoo.baz.com", 1000, undefined);
-    test_apply_records_with_times("http://cfoo.baz.com", undefined, 2000);
-    test_apply_records_with_times("http://dfoo.baz.com", 1000, 2000);
-
-    test_apply_multiple_records_with_times();
-
-    test_apply_same_record_with_different_times();
-
   } finally {
     store.wipe();
   }
-}
\ No newline at end of file
+}
diff --git a/services/sync/tests/unit/test_password_tracker.js b/services/sync/tests/unit/test_password_tracker.js
index 09ca141a6..ddfc524ab 100644
--- a/services/sync/tests/unit/test_password_tracker.js
+++ b/services/sync/tests/unit/test_password_tracker.js
@@ -8,9 +8,9 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
 Service.engineManager.register(PasswordEngine);
-var engine = Service.engineManager.get("passwords");
-var store  = engine._store;
-var tracker = engine._tracker;
+let engine = Service.engineManager.get("passwords");
+let store  = engine._store;
+let tracker = engine._tracker;
 
 // Don't do asynchronous writes.
 tracker.persistChangedIDs = false;
diff --git a/services/sync/tests/unit/test_password_validator.js b/services/sync/tests/unit/test_password_validator.js
deleted file mode 100644
index a4a148fbe..000000000
--- a/services/sync/tests/unit/test_password_validator.js
+++ /dev/null
@@ -1,158 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Components.utils.import("resource://services-sync/engines/passwords.js");
-
-function getDummyServerAndClient() {
-  return {
-    server: [
-      {
-        id: "11111",
-        guid: "11111",
-        hostname: "https://www.11111.com",
-        formSubmitURL: "https://www.11111.com/login",
-        password: "qwerty123",
-        passwordField: "pass",
-        username: "foobar",
-        usernameField: "user",
-        httpRealm: null,
-      },
-      {
-        id: "22222",
-        guid: "22222",
-        hostname: "https://www.22222.org",
-        formSubmitURL: "https://www.22222.org/login",
-        password: "hunter2",
-        passwordField: "passwd",
-        username: "baz12345",
-        usernameField: "user",
-        httpRealm: null,
-      },
-      {
-        id: "33333",
-        guid: "33333",
-        hostname: "https://www.33333.com",
-        formSubmitURL: "https://www.33333.com/login",
-        password: "p4ssw0rd",
-        passwordField: "passwad",
-        username: "quux",
-        usernameField: "user",
-        httpRealm: null,
-      },
-    ],
-    client: [
-      {
-        id: "11111",
-        guid: "11111",
-        hostname: "https://www.11111.com",
-        formSubmitURL: "https://www.11111.com/login",
-        password: "qwerty123",
-        passwordField: "pass",
-        username: "foobar",
-        usernameField: "user",
-        httpRealm: null,
-      },
-      {
-        id: "22222",
-        guid: "22222",
-        hostname: "https://www.22222.org",
-        formSubmitURL: "https://www.22222.org/login",
-        password: "hunter2",
-        passwordField: "passwd",
-        username: "baz12345",
-        usernameField: "user",
-        httpRealm: null,
-
-      },
-      {
-        id: "33333",
-        guid: "33333",
-        hostname: "https://www.33333.com",
-        formSubmitURL: "https://www.33333.com/login",
-        password: "p4ssw0rd",
-        passwordField: "passwad",
-        username: "quux",
-        usernameField: "user",
-        httpRealm: null,
-      }
-    ]
-  };
-}
-
-
-add_test(function test_valid() {
-  let { server, client } = getDummyServerAndClient();
-  let validator = new PasswordValidator();
-  let { problemData, clientRecords, records, deletedRecords } =
-      validator.compareClientWithServer(client, server);
-  equal(clientRecords.length, 3);
-  equal(records.length, 3)
-  equal(deletedRecords.length, 0);
-  deepEqual(problemData, validator.emptyProblemData());
-
-  run_next_test();
-});
-
-add_test(function test_missing() {
-  let validator = new PasswordValidator();
-  {
-    let { server, client } = getDummyServerAndClient();
-
-    client.pop();
-
-    let { problemData, clientRecords, records, deletedRecords } =
-        validator.compareClientWithServer(client, server);
-
-    equal(clientRecords.length, 2);
-    equal(records.length, 3)
-    equal(deletedRecords.length, 0);
-
-    let expected = validator.emptyProblemData();
-    expected.clientMissing.push("33333");
-    deepEqual(problemData, expected);
-  }
-  {
-    let { server, client } = getDummyServerAndClient();
-
-    server.pop();
-
-    let { problemData, clientRecords, records, deletedRecords } =
-        validator.compareClientWithServer(client, server);
-
-    equal(clientRecords.length, 3);
-    equal(records.length, 2)
-    equal(deletedRecords.length, 0);
-
-    let expected = validator.emptyProblemData();
-    expected.serverMissing.push("33333");
-    deepEqual(problemData, expected);
-  }
-
-  run_next_test();
-});
-
-
-add_test(function test_deleted() {
-  let { server, client } = getDummyServerAndClient();
-  let deletionRecord = { id: "444444", guid: "444444", deleted: true };
-
-  server.push(deletionRecord);
-  let validator = new PasswordValidator();
-
-  let { problemData, clientRecords, records, deletedRecords } =
-      validator.compareClientWithServer(client, server);
-
-  equal(clientRecords.length, 3);
-  equal(records.length, 4);
-  deepEqual(deletedRecords, [deletionRecord]);
-
-  let expected = validator.emptyProblemData();
-  deepEqual(problemData, expected);
-
-  run_next_test();
-});
-
-
-function run_test() {
-  run_next_test();
-}
diff --git a/services/sync/tests/unit/test_postqueue.js b/services/sync/tests/unit/test_postqueue.js
deleted file mode 100644
index e60008a96..000000000
--- a/services/sync/tests/unit/test_postqueue.js
+++ /dev/null
@@ -1,455 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-let { PostQueue } = Cu.import("resource://services-sync/record.js", {});
-
-initTestLogging("Trace");
-
-function makeRecord(nbytes) {
-  // make a string 2-bytes less - the added quotes will make it correct.
-  return {
-    toJSON: () => "x".repeat(nbytes-2),
-  }
-}
-
-function makePostQueue(config, lastModTime, responseGenerator) {
-  let stats = {
-    posts: [],
-  }
-  let poster = (data, headers, batch, commit) => {
-    let thisPost = { nbytes: data.length, batch, commit };
-    if (headers.length) {
-      thisPost.headers = headers;
-    }
-    stats.posts.push(thisPost);
-    return responseGenerator.next().value;
-  }
-
-  let done = () => {}
-  let pq = new PostQueue(poster, lastModTime, config, getTestLogger(), done);
-  return { pq, stats };
-}
-
-add_test(function test_simple() {
-  let config = {
-    max_post_bytes: 1000,
-    max_post_records: 100,
-    max_batch_bytes: Infinity,
-    max_batch_records: Infinity,
-  }
-
-  const time = 11111111;
-
-  function* responseGenerator() {
-    yield { success: true, status: 200, headers: { 'x-weave-timestamp': time + 100, 'x-last-modified': time + 100 } };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  pq.enqueue(makeRecord(10));
-  pq.flush(true);
-
-  deepEqual(stats.posts, [{
-    nbytes: 12, // expect our 10 byte record plus "[]" to wrap it.
-    commit: true, // we don't know if we have batch semantics, so committed.
-    headers: [["x-if-unmodified-since", time]],
-    batch: "true"}]);
-
-  run_next_test();
-});
-
-// Test we do the right thing when we need to make multiple posts when there
-// are no batch semantics
-add_test(function test_max_post_bytes_no_batch() {
-  let config = {
-    max_post_bytes: 50,
-    max_post_records: 4,
-    max_batch_bytes: Infinity,
-    max_batch_records: Infinity,
-  }
-
-  const time = 11111111;
-  function* responseGenerator() {
-    yield { success: true, status: 200, headers: { 'x-weave-timestamp': time + 100, 'x-last-modified': time + 100 } };
-    yield { success: true, status: 200, headers: { 'x-weave-timestamp': time + 200, 'x-last-modified': time + 200 } };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  pq.enqueue(makeRecord(20)); // total size now 22 bytes - "[" + record + "]"
-  pq.enqueue(makeRecord(20)); // total size now 43 bytes - "[" + record + "," + record + "]"
-  pq.enqueue(makeRecord(20)); // this will exceed our byte limit, so will be in the 2nd POST.
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      headers: [["x-if-unmodified-since", time]],
-      batch: "true",
-    },{
-      nbytes: 22,
-      commit: false, // we know we aren't in a batch, so never commit.
-      headers: [["x-if-unmodified-since", time + 100]],
-      batch: null,
-    }
-  ]);
-  equal(pq.lastModified, time + 200);
-
-  run_next_test();
-});
-
-// Similar to the above, but we've hit max_records instead of max_bytes.
-add_test(function test_max_post_records_no_batch() {
-  let config = {
-    max_post_bytes: 100,
-    max_post_records: 2,
-    max_batch_bytes: Infinity,
-    max_batch_records: Infinity,
-  }
-
-  const time = 11111111;
-
-  function* responseGenerator() {
-    yield { success: true, status: 200, headers: { 'x-weave-timestamp': time + 100, 'x-last-modified': time + 100 } };
-    yield { success: true, status: 200, headers: { 'x-weave-timestamp': time + 200, 'x-last-modified': time + 200 } };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  pq.enqueue(makeRecord(20)); // total size now 22 bytes - "[" + record + "]"
-  pq.enqueue(makeRecord(20)); // total size now 43 bytes - "[" + record + "," + record + "]"
-  pq.enqueue(makeRecord(20)); // this will exceed our records limit, so will be in the 2nd POST.
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      batch: "true",
-      headers: [["x-if-unmodified-since", time]],
-    },{
-      nbytes: 22,
-      commit: false, // we know we aren't in a batch, so never commit.
-      batch: null,
-      headers: [["x-if-unmodified-since", time + 100]],
-    }
-  ]);
-  equal(pq.lastModified, time + 200);
-
-  run_next_test();
-});
-
-// Batch tests.
-
-// Test making a single post when batch semantics are in place.
-add_test(function test_single_batch() {
-  let config = {
-    max_post_bytes: 1000,
-    max_post_records: 100,
-    max_batch_bytes: 2000,
-    max_batch_records: 200,
-  }
-  const time = 11111111;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time, 'x-weave-timestamp': time + 100 },
-    };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  ok(pq.enqueue(makeRecord(10)).enqueued);
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 12, // expect our 10 byte record plus "[]" to wrap it.
-      commit: true, // we don't know if we have batch semantics, so committed.
-      batch: "true",
-      headers: [["x-if-unmodified-since", time]],
-    }
-  ]);
-
-  run_next_test();
-});
-
-// Test we do the right thing when we need to make multiple posts when there
-// are batch semantics in place.
-add_test(function test_max_post_bytes_batch() {
-  let config = {
-    max_post_bytes: 50,
-    max_post_records: 4,
-    max_batch_bytes: 5000,
-    max_batch_records: 100,
-  }
-
-  const time = 11111111;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time, 'x-weave-timestamp': time + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time + 200, 'x-weave-timestamp': time + 200 },
-   };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 22 bytes - "[" + record + "]"
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 43 bytes - "[" + record + "," + record + "]"
-  ok(pq.enqueue(makeRecord(20)).enqueued); // this will exceed our byte limit, so will be in the 2nd POST.
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time]],
-    },{
-      nbytes: 22,
-      commit: true,
-      batch: 1234,
-      headers: [['x-if-unmodified-since', time]],
-    }
-  ]);
-
-  equal(pq.lastModified, time + 200);
-
-  run_next_test();
-});
-
-// Test we do the right thing when the batch bytes limit is exceeded.
-add_test(function test_max_post_bytes_batch() {
-  let config = {
-    max_post_bytes: 50,
-    max_post_records: 20,
-    max_batch_bytes: 70,
-    max_batch_records: 100,
-  }
-
-  const time0 = 11111111;
-  const time1 = 22222222;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time0, 'x-weave-timestamp': time0 + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time1, 'x-weave-timestamp': time1 },
-    };
-    yield { success: true, status: 202, obj: { batch: 5678 },
-            headers: { 'x-last-modified': time1, 'x-weave-timestamp': time1 + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 5678 },
-            headers: { 'x-last-modified': time1 + 200, 'x-weave-timestamp': time1 + 200 },
-    };
-  }
-
-  let { pq, stats } = makePostQueue(config, time0, responseGenerator());
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 22 bytes - "[" + record + "]"
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 43 bytes - "[" + record + "," + record + "]"
-  // this will exceed our POST byte limit, so will be in the 2nd POST - but still in the first batch.
-  ok(pq.enqueue(makeRecord(20)).enqueued); // 22 bytes for 2nd post, 55 bytes in the batch.
-  // this will exceed our batch byte limit, so will be in a new batch.
-  ok(pq.enqueue(makeRecord(20)).enqueued); // 22 bytes in 3rd post/2nd batch
-  ok(pq.enqueue(makeRecord(20)).enqueued); // 43 bytes in 3rd post/2nd batch
-  // This will exceed POST byte limit, so will be in the 4th post, part of the 2nd batch.
-  ok(pq.enqueue(makeRecord(20)).enqueued); // 22 bytes for 4th post/2nd batch
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time0]],
-    },{
-      // second post of 22 bytes in the first batch, committing it.
-      nbytes: 22,
-      commit: true,
-      batch: 1234,
-      headers: [['x-if-unmodified-since', time0]],
-    }, {
-      // 3rd post of 43 bytes in a new batch, not yet committing it.
-      nbytes: 43,
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time1]],
-    },{
-      // 4th post of 22 bytes in second batch, committing it.
-      nbytes: 22,
-      commit: true,
-      batch: 5678,
-      headers: [['x-if-unmodified-since', time1]],
-    },
-  ]);
-
-  equal(pq.lastModified, time1 + 200);
-
-  run_next_test();
-});
-
-// Test we split up the posts when we exceed the record limit when batch semantics
-// are in place.
-add_test(function test_max_post_bytes_batch() {
-  let config = {
-    max_post_bytes: 1000,
-    max_post_records: 2,
-    max_batch_bytes: 5000,
-    max_batch_records: 100,
-  }
-
-  const time = 11111111;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time, 'x-weave-timestamp': time + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time + 200, 'x-weave-timestamp': time + 200 },
-   };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 22 bytes - "[" + record + "]"
-  ok(pq.enqueue(makeRecord(20)).enqueued); // total size now 43 bytes - "[" + record + "," + record + "]"
-  ok(pq.enqueue(makeRecord(20)).enqueued); // will exceed record limit, so will be in 2nd post.
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time]],
-    },{
-      nbytes: 22,
-      commit: true,
-      batch: 1234,
-      headers: [['x-if-unmodified-since', time]],
-    }
-  ]);
-
-  equal(pq.lastModified, time + 200);
-
-  run_next_test();
-});
-
-// Test that a single huge record fails to enqueue
-add_test(function test_huge_record() {
-  let config = {
-    max_post_bytes: 50,
-    max_post_records: 100,
-    max_batch_bytes: 5000,
-    max_batch_records: 100,
-  }
-
-  const time = 11111111;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time, 'x-weave-timestamp': time + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time + 200, 'x-weave-timestamp': time + 200 },
-   };
-  }
-
-  let { pq, stats } = makePostQueue(config, time, responseGenerator());
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  let { enqueued, error } = pq.enqueue(makeRecord(1000));
-  ok(!enqueued);
-  notEqual(error, undefined);
-
-  // make sure that we keep working, skipping the bad record entirely
-  // (handling the error the queue reported is left up to caller)
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    {
-      nbytes: 43, // 43 for the first post
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time]],
-    },{
-      nbytes: 22,
-      commit: true,
-      batch: 1234,
-      headers: [['x-if-unmodified-since', time]],
-    }
-  ]);
-
-  equal(pq.lastModified, time + 200);
-
-  run_next_test();
-});
-
-// Test we do the right thing when the batch record limit is exceeded.
-add_test(function test_max_records_batch() {
-  let config = {
-    max_post_bytes: 1000,
-    max_post_records: 3,
-    max_batch_bytes: 10000,
-    max_batch_records: 5,
-  }
-
-  const time0 = 11111111;
-  const time1 = 22222222;
-  function* responseGenerator() {
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time0, 'x-weave-timestamp': time0 + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 1234 },
-            headers: { 'x-last-modified': time1, 'x-weave-timestamp': time1 },
-    };
-    yield { success: true, status: 202, obj: { batch: 5678 },
-            headers: { 'x-last-modified': time1, 'x-weave-timestamp': time1 + 100 },
-    };
-    yield { success: true, status: 202, obj: { batch: 5678 },
-            headers: { 'x-last-modified': time1 + 200, 'x-weave-timestamp': time1 + 200 },
-    };
-  }
-
-  let { pq, stats } = makePostQueue(config, time0, responseGenerator());
-
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  ok(pq.enqueue(makeRecord(20)).enqueued);
-
-  pq.flush(true);
-
-  deepEqual(stats.posts, [
-    { // 3 records
-      nbytes: 64,
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time0]],
-    },{ // 2 records -- end batch1
-      nbytes: 43,
-      commit: true,
-      batch: 1234,
-      headers: [['x-if-unmodified-since', time0]],
-    }, { // 3 records
-      nbytes: 64,
-      commit: false,
-      batch: "true",
-      headers: [['x-if-unmodified-since', time1]],
-    },{ // 1 record -- end batch2
-      nbytes: 22,
-      commit: true,
-      batch: 5678,
-      headers: [['x-if-unmodified-since', time1]],
-    },
-  ]);
-
-  equal(pq.lastModified, time1 + 200);
-
-  run_next_test();
-});
\ No newline at end of file
diff --git a/services/sync/tests/unit/test_prefs_store.js b/services/sync/tests/unit/test_prefs_store.js
index 9c321bceb..51b220d53 100644
--- a/services/sync/tests/unit/test_prefs_store.js
+++ b/services/sync/tests/unit/test_prefs_store.js
@@ -23,22 +23,25 @@ function makePersona(id) {
 }
 
 function run_test() {
-  _("Test fixtures.");
-  // read our custom prefs file before doing anything.
-  Services.prefs.readUserPrefs(do_get_file("prefs_test_prefs_store.js"));
-  // Now we've read from this file, any writes the pref service makes will be
-  // back to this prefs_test_prefs_store.js directly in the obj dir. This
-  // upsets things in confusing ways :) We avoid this by explicitly telling the
-  // pref service to use a file in our profile dir.
-  let prefFile = do_get_profile();
-  prefFile.append("prefs.js");
-  Services.prefs.savePrefFile(prefFile);
-  Services.prefs.readUserPrefs(prefFile);
-
   let store = Service.engineManager.get("prefs")._store;
   let prefs = new Preferences();
   try {
 
+    _("Test fixtures.");
+    Svc.Prefs.set("prefs.sync.testing.int", true);
+    Svc.Prefs.set("prefs.sync.testing.string", true);
+    Svc.Prefs.set("prefs.sync.testing.bool", true);
+    Svc.Prefs.set("prefs.sync.testing.dont.change", true);
+    Svc.Prefs.set("prefs.sync.testing.turned.off", false);
+    Svc.Prefs.set("prefs.sync.testing.nonexistent", true);
+
+    prefs.set("testing.int", 123);
+    prefs.set("testing.string", "ohai");
+    prefs.set("testing.bool", true);
+    prefs.set("testing.dont.change", "Please don't change me.");
+    prefs.set("testing.turned.off", "I won't get synced.");
+    prefs.set("testing.not.turned.on", "I won't get synced either!");
+
     _("The GUID corresponds to XUL App ID.");
     let allIDs = store.getAllIDs();
     let ids = Object.keys(allIDs);
@@ -58,22 +61,17 @@ function run_test() {
     do_check_eq(record.value["testing.int"], 123);
     do_check_eq(record.value["testing.string"], "ohai");
     do_check_eq(record.value["testing.bool"], true);
-    // non-existing prefs get null as the value
     do_check_eq(record.value["testing.nonexistent"], null);
-    // as do prefs that have a default value.
-    do_check_eq(record.value["testing.default"], null);
     do_check_false("testing.turned.off" in record.value);
     do_check_false("testing.not.turned.on" in record.value);
 
-    _("Prefs record contains non-default pref sync prefs too.");
-    do_check_eq(record.value["services.sync.prefs.sync.testing.int"], null);
-    do_check_eq(record.value["services.sync.prefs.sync.testing.string"], null);
-    do_check_eq(record.value["services.sync.prefs.sync.testing.bool"], null);
-    do_check_eq(record.value["services.sync.prefs.sync.testing.dont.change"], null);
-    // but this one is a user_pref so *will* be synced.
+    _("Prefs record contains pref sync prefs too.");
+    do_check_eq(record.value["services.sync.prefs.sync.testing.int"], true);
+    do_check_eq(record.value["services.sync.prefs.sync.testing.string"], true);
+    do_check_eq(record.value["services.sync.prefs.sync.testing.bool"], true);
+    do_check_eq(record.value["services.sync.prefs.sync.testing.dont.change"], true);
     do_check_eq(record.value["services.sync.prefs.sync.testing.turned.off"], false);
-    do_check_eq(record.value["services.sync.prefs.sync.testing.nonexistent"], null);
-    do_check_eq(record.value["services.sync.prefs.sync.testing.default"], null);
+    do_check_eq(record.value["services.sync.prefs.sync.testing.nonexistent"], true);
 
     _("Update some prefs, including one that's to be reset/deleted.");
     Svc.Prefs.set("testing.deleteme", "I'm going to be deleted!");
@@ -99,28 +97,28 @@ function run_test() {
     // Ensure we don't go to the network to fetch personas and end up leaking
     // stuff.
     Services.io.offline = true;
-    do_check_false(!!prefs.get("lightweightThemes.selectedThemeID"));
+    do_check_false(!!prefs.get("lightweightThemes.isThemeSelected"));
     do_check_eq(LightweightThemeManager.currentTheme, null);
 
     let persona1 = makePersona();
     let persona2 = makePersona();
     let usedThemes = JSON.stringify([persona1, persona2]);
     record.value = {
-      "lightweightThemes.selectedThemeID": persona1.id,
+      "lightweightThemes.isThemeSelected": true,
       "lightweightThemes.usedThemes": usedThemes
     };
     store.update(record);
-    do_check_eq(prefs.get("lightweightThemes.selectedThemeID"), persona1.id);
+    do_check_true(prefs.get("lightweightThemes.isThemeSelected"));
     do_check_true(Utils.deepEquals(LightweightThemeManager.currentTheme,
                   persona1));
 
     _("Disable persona");
     record.value = {
-      "lightweightThemes.selectedThemeID": null,
+      "lightweightThemes.isThemeSelected": false,
       "lightweightThemes.usedThemes": usedThemes
     };
     store.update(record);
-    do_check_false(!!prefs.get("lightweightThemes.selectedThemeID"));
+    do_check_false(prefs.get("lightweightThemes.isThemeSelected"));
     do_check_eq(LightweightThemeManager.currentTheme, null);
 
     _("Only the current app's preferences are applied.");
@@ -131,37 +129,6 @@ function run_test() {
     store.update(record);
     do_check_eq(prefs.get("testing.int"), 42);
 
-    _("The light-weight theme preference is handled correctly.");
-    let lastThemeID = undefined;
-    let orig_updateLightWeightTheme = store._updateLightWeightTheme;
-    store._updateLightWeightTheme = function(themeID) {
-      lastThemeID = themeID;
-    }
-    try {
-      record = new PrefRec("prefs", PREFS_GUID);
-      record.value = {
-        "testing.int": 42,
-      };
-      store.update(record);
-      do_check_true(lastThemeID === undefined,
-                    "should not have tried to change the theme with an unrelated pref.");
-      Services.prefs.setCharPref("lightweightThemes.selectedThemeID", "foo");
-      record.value = {
-        "lightweightThemes.selectedThemeID": "foo",
-      };
-      store.update(record);
-      do_check_true(lastThemeID === undefined,
-                    "should not have tried to change the theme when the incoming pref matches current value.");
-
-      record.value = {
-        "lightweightThemes.selectedThemeID": "bar",
-      };
-      store.update(record);
-      do_check_eq(lastThemeID, "bar",
-                  "should have tried to change the theme when the incoming pref was different.");
-    } finally {
-      store._updateLightWeightTheme = orig_updateLightWeightTheme;
-    }
   } finally {
     prefs.resetBranch("");
   }
diff --git a/services/sync/tests/unit/test_records_crypto.js b/services/sync/tests/unit/test_records_crypto.js
index 392a746ef..4d623c917 100644
--- a/services/sync/tests/unit/test_records_crypto.js
+++ b/services/sync/tests/unit/test_records_crypto.js
@@ -10,7 +10,7 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-var cryptoWrap;
+let cryptoWrap;
 
 function crypted_resource_handler(metadata, response) {
   let obj = {id: "resource",
@@ -148,32 +148,6 @@ function run_test() {
     do_check_eq(bookmarkItem.decrypt(Service.collectionKeys.keyForCollection("bookmarks")).stuff,
         "my payload here");
 
-    do_check_true(Service.collectionKeys.hasKeysFor(["bookmarks"]));
-
-    // Add a key for some new collection and verify that it isn't the
-    // default key.
-    do_check_false(Service.collectionKeys.hasKeysFor(["forms"]));
-    do_check_false(Service.collectionKeys.hasKeysFor(["bookmarks", "forms"]));
-    let oldFormsKey = Service.collectionKeys.keyForCollection("forms");
-    do_check_eq(oldFormsKey, Service.collectionKeys._default);
-    let newKeys = Service.collectionKeys.ensureKeysFor(["forms"]);
-    do_check_true(newKeys.hasKeysFor(["forms"]));
-    do_check_true(newKeys.hasKeysFor(["bookmarks", "forms"]));
-    let newFormsKey = newKeys.keyForCollection("forms");
-    do_check_neq(newFormsKey, oldFormsKey);
-
-    // Verify that this doesn't overwrite keys
-    let regetKeys = newKeys.ensureKeysFor(["forms"]);
-    do_check_eq(regetKeys.keyForCollection("forms"), newFormsKey);
-
-    const emptyKeys = new CollectionKeyManager();
-    payload = {
-      default: Service.collectionKeys._default.keyPairB64,
-      collections: {}
-    };
-    // Verify that not passing `modified` doesn't throw
-    emptyKeys.setContents(payload, null);
-
     log.info("Done!");
   }
   finally {
diff --git a/services/sync/tests/unit/test_resource.js b/services/sync/tests/unit/test_resource.js
index 8f5534c92..027d662b4 100644
--- a/services/sync/tests/unit/test_resource.js
+++ b/services/sync/tests/unit/test_resource.js
@@ -7,9 +7,9 @@ Cu.import("resource://services-sync/identity.js");
 Cu.import("resource://services-sync/resource.js");
 Cu.import("resource://services-sync/util.js");
 
-var logger;
+let logger;
 
-var fetched = false;
+let fetched = false;
 function server_open(metadata, response) {
   let body;
   if (metadata.method == "GET") {
@@ -45,7 +45,7 @@ function server_404(metadata, response) {
   response.bodyOutputStream.write(body, body.length);
 }
 
-var pacFetched = false;
+let pacFetched = false;
 function server_pac(metadata, response) {
   pacFetched = true;
   let body = 'function FindProxyForURL(url, host) { return "DIRECT"; }';
@@ -55,7 +55,7 @@ function server_pac(metadata, response) {
 }
 
 
-var sample_data = {
+let sample_data = {
   some: "sample_data",
   injson: "format",
   number: 42
@@ -140,7 +140,7 @@ function server_headers(metadata, response) {
   header_names = header_names.sort();
 
   headers = {};
-  for (let header of header_names) {
+  for each (let header in header_names) {
     headers[header] = metadata.getHeader(header);
   }
   let body = JSON.stringify(headers);
@@ -442,8 +442,6 @@ function run_test() {
   // It throws and logs.
   do_check_eq(error.result, Cr.NS_ERROR_MALFORMED_URI);
   do_check_eq(error, "Error: NS_ERROR_MALFORMED_URI");
-  // Note the strings haven't been formatted yet, but that's OK for this test.
-  do_check_eq(warnings.pop(), "${action} request to ${url} failed: ${ex}");
   do_check_eq(warnings.pop(),
               "Got exception calling onProgress handler during fetch of " +
               server.baseURI + "/json");
@@ -467,7 +465,6 @@ function run_test() {
   // It throws and logs.
   do_check_eq(error.result, Cr.NS_ERROR_XPC_JS_THREW_STRING);
   do_check_eq(error, "Error: NS_ERROR_XPC_JS_THREW_STRING");
-  do_check_eq(warnings.pop(), "${action} request to ${url} failed: ${ex}");
   do_check_eq(warnings.pop(),
               "Got exception calling onProgress handler during fetch of " +
               server.baseURI + "/json");
diff --git a/services/sync/tests/unit/test_resource_async.js b/services/sync/tests/unit/test_resource_async.js
index 0db91a1b5..c4b9a3804 100644
--- a/services/sync/tests/unit/test_resource_async.js
+++ b/services/sync/tests/unit/test_resource_async.js
@@ -7,9 +7,9 @@ Cu.import("resource://services-sync/identity.js");
 Cu.import("resource://services-sync/resource.js");
 Cu.import("resource://services-sync/util.js");
 
-var logger;
+let logger;
 
-var fetched = false;
+let fetched = false;
 function server_open(metadata, response) {
   let body;
   if (metadata.method == "GET") {
@@ -45,7 +45,7 @@ function server_404(metadata, response) {
   response.bodyOutputStream.write(body, body.length);
 }
 
-var pacFetched = false;
+let pacFetched = false;
 function server_pac(metadata, response) {
   _("Invoked PAC handler.");
   pacFetched = true;
@@ -55,7 +55,7 @@ function server_pac(metadata, response) {
   response.bodyOutputStream.write(body, body.length);
 }
 
-var sample_data = {
+let sample_data = {
   some: "sample_data",
   injson: "format",
   number: 42
@@ -140,7 +140,7 @@ function server_headers(metadata, response) {
   header_names = header_names.sort();
 
   headers = {};
-  for (let header of header_names) {
+  for each (let header in header_names) {
     headers[header] = metadata.getHeader(header);
   }
   let body = JSON.stringify(headers);
@@ -148,7 +148,7 @@ function server_headers(metadata, response) {
   response.bodyOutputStream.write(body, body.length);
 }
 
-var quotaValue;
+let quotaValue;
 Observers.add("weave:service:quota:remaining",
               function (subject) { quotaValue = subject; });
 
@@ -221,7 +221,7 @@ add_test(function test_new_channel() {
 });
 
 
-var server;
+let server;
 
 add_test(function setup() {
   server = httpd_setup({
diff --git a/services/sync/tests/unit/test_resource_header.js b/services/sync/tests/unit/test_resource_header.js
index 4f28e01da..1835cc0e0 100644
--- a/services/sync/tests/unit/test_resource_header.js
+++ b/services/sync/tests/unit/test_resource_header.js
@@ -11,7 +11,7 @@ function run_test() {
   run_next_test();
 }
 
-var httpServer = new HttpServer();
+let httpServer = new HttpServer();
 httpServer.registerPathHandler("/content", contentHandler);
 httpServer.start(-1);
 
@@ -20,8 +20,8 @@ const TEST_URL = "http://localhost:" + HTTP_PORT + "/content";
 const BODY = "response body";
 
 // Keep headers for later inspection.
-var auth = null;
-var foo  = null;
+let auth = null;
+let foo  = null;
 function contentHandler(metadata, response) {
   _("Handling request.");
   auth = metadata.getHeader("Authorization");
diff --git a/services/sync/tests/unit/test_resource_ua.js b/services/sync/tests/unit/test_resource_ua.js
index 31c2cd379..279a2b3e6 100644
--- a/services/sync/tests/unit/test_resource_ua.js
+++ b/services/sync/tests/unit/test_resource_ua.js
@@ -7,18 +7,15 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-var httpProtocolHandler = Cc["@mozilla.org/network/protocol;1?name=http"]
-                          .getService(Ci.nsIHttpProtocolHandler);
-
 // Tracking info/collections.
-var collectionsHelper = track_collections_helper();
-var collections = collectionsHelper.collections;
+let collectionsHelper = track_collections_helper();
+let collections = collectionsHelper.collections;
 
-var meta_global;
-var server;
+let meta_global;
+let server;
 
-var expectedUA;
-var ua;
+let expectedUA;
+let ua;
 function uaHandler(f) {
   return function(request, response) {
     ua = request.getHeader("User-Agent");
@@ -40,10 +37,7 @@ function run_test() {
   Service.clusterURL = server.baseURI + "/";
   _("Server URL: " + server.baseURI);
 
-  // Note this string is missing the trailing ".destkop" as the test
-  // adjusts the "client.type" pref where that portion comes from.
   expectedUA = Services.appinfo.name + "/" + Services.appinfo.version +
-               " (" + httpProtocolHandler.oscpu + ")" +
                " FxSync/" + WEAVE_VERSION + "." +
                Services.appinfo.appBuildID;
 
diff --git a/services/sync/tests/unit/test_score_triggers.js b/services/sync/tests/unit/test_score_triggers.js
index 513be685a..98d3e094a 100644
--- a/services/sync/tests/unit/test_score_triggers.js
+++ b/services/sync/tests/unit/test_score_triggers.js
@@ -12,13 +12,13 @@ Cu.import("resource://testing-common/services/sync/utils.js");
 
 Service.engineManager.clear();
 Service.engineManager.register(RotaryEngine);
-var engine = Service.engineManager.get("rotary");
-var tracker = engine._tracker;
+let engine = Service.engineManager.get("rotary");
+let tracker = engine._tracker;
 engine.enabled = true;
 
 // Tracking info/collections.
-var collectionsHelper = track_collections_helper();
-var upd = collectionsHelper.with_updated_collection;
+let collectionsHelper = track_collections_helper();
+let upd = collectionsHelper.with_updated_collection;
 
 function sync_httpd_setup() {
   let handlers = {};
diff --git a/services/sync/tests/unit/test_service_attributes.js b/services/sync/tests/unit/test_service_attributes.js
index 931c7741a..dc82f5edb 100644
--- a/services/sync/tests/unit/test_service_attributes.js
+++ b/services/sync/tests/unit/test_service_attributes.js
@@ -29,6 +29,7 @@ function test_urls() {
 
     Service.serverURL = "http://weave.server/";
     Service.clusterURL = "http://weave.cluster/";
+    do_check_eq(Svc.Prefs.get("clusterURL"), "http://weave.cluster/");
 
     do_check_eq(Service.userBaseURL, "http://weave.cluster/1.1/johndoe/");
     do_check_eq(Service.infoURL,
@@ -62,11 +63,11 @@ function test_urls() {
     _("The 'serverURL' attributes updates/resets preferences.");
     // Identical value doesn't do anything
     Service.serverURL = Service.serverURL;
-    do_check_eq(Service.clusterURL, "http://weave.cluster/");
+    do_check_eq(Svc.Prefs.get("clusterURL"), "http://weave.cluster/");
 
     Service.serverURL = "http://different.auth.node/";
     do_check_eq(Svc.Prefs.get("serverURL"), "http://different.auth.node/");
-    do_check_eq(Service.clusterURL, "");
+    do_check_eq(Svc.Prefs.get("clusterURL"), undefined);
 
   } finally {
     Svc.Prefs.resetBranch("");
@@ -83,12 +84,12 @@ function test_syncID() {
     do_check_eq(Svc.Prefs.get("client.syncID"), undefined);
 
     // Performing the first get on the attribute will generate a new GUID.
-    do_check_eq(Service.syncID, "fake-guid-00");
-    do_check_eq(Svc.Prefs.get("client.syncID"), "fake-guid-00");
+    do_check_eq(Service.syncID, "fake-guid-0");
+    do_check_eq(Svc.Prefs.get("client.syncID"), "fake-guid-0");
 
     Svc.Prefs.set("client.syncID", Utils.makeGUID());
-    do_check_eq(Svc.Prefs.get("client.syncID"), "fake-guid-01");
-    do_check_eq(Service.syncID, "fake-guid-01");
+    do_check_eq(Svc.Prefs.get("client.syncID"), "fake-guid-1");
+    do_check_eq(Service.syncID, "fake-guid-1");
   } finally {
     Svc.Prefs.resetBranch("");
     new FakeGUIDService();
diff --git a/services/sync/tests/unit/test_service_detect_upgrade.js b/services/sync/tests/unit/test_service_detect_upgrade.js
index 0f46832d9..528bd751b 100644
--- a/services/sync/tests/unit/test_service_detect_upgrade.js
+++ b/services/sync/tests/unit/test_service_detect_upgrade.js
@@ -60,7 +60,7 @@ add_test(function v4_upgrade() {
                           }]}]};
     delete Svc.Session;
     Svc.Session = {
-      getBrowserState: () => JSON.stringify(myTabs)
+      getBrowserState: function () JSON.stringify(myTabs)
     };
 
     Service.status.resetSync();
@@ -229,7 +229,7 @@ add_test(function v5_upgrade() {
                           }]}]};
     delete Svc.Session;
     Svc.Session = {
-      getBrowserState: () => JSON.stringify(myTabs)
+      getBrowserState: function () JSON.stringify(myTabs)
     };
 
     Service.status.resetSync();
diff --git a/services/sync/tests/unit/test_service_getStorageInfo.js b/services/sync/tests/unit/test_service_getStorageInfo.js
index 841dceb78..4d463044b 100644
--- a/services/sync/tests/unit/test_service_getStorageInfo.js
+++ b/services/sync/tests/unit/test_service_getStorageInfo.js
@@ -7,10 +7,7 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-var httpProtocolHandler = Cc["@mozilla.org/network/protocol;1?name=http"]
-                          .getService(Ci.nsIHttpProtocolHandler);
-
-var collections = {steam:  65.11328,
+let collections = {steam:  65.11328,
                    petrol: 82.488281,
                    diesel: 2.25488281};
 
@@ -40,7 +37,6 @@ add_test(function test_success() {
                                      Service.identity.username,
                                      Service.identity.basicPassword));
     let expectedUA = Services.appinfo.name + "/" + Services.appinfo.version +
-                     " (" + httpProtocolHandler.oscpu + ")" +
                      " FxSync/" + WEAVE_VERSION + "." +
                      Services.appinfo.appBuildID + ".desktop";
     do_check_eq(handler.request.getHeader("User-Agent"), expectedUA);
diff --git a/services/sync/tests/unit/test_service_login.js b/services/sync/tests/unit/test_service_login.js
index 2ecb0a377..52ee5e63a 100644
--- a/services/sync/tests/unit/test_service_login.js
+++ b/services/sync/tests/unit/test_service_login.js
@@ -183,7 +183,7 @@ add_test(function test_login_on_sync() {
     // This test exercises these two branches.
 
     _("We're ready to sync if locked.");
-    Service.enabled = true;
+    Svc.Prefs.set("enabled", true);
     Services.io.offline = false;
     Service.scheduler.checkSyncStatus();
     do_check_true(scheduleCalled);
diff --git a/services/sync/tests/unit/test_service_passwordUTF8.js b/services/sync/tests/unit/test_service_passwordUTF8.js
index e781050b3..733911291 100644
--- a/services/sync/tests/unit/test_service_passwordUTF8.js
+++ b/services/sync/tests/unit/test_service_passwordUTF8.js
@@ -11,13 +11,13 @@ const APPLES = "\uf8ff\uf8ff\uf8ff\uf8ff";
 const LOWBYTES = "\xff\xff\xff\xff";
 
 // Poor man's /etc/passwd.  Static since there's no btoa()/atob() in xpcshell.
-var basicauth = {};
+let basicauth = {};
 basicauth[LOWBYTES] = "Basic am9obmRvZTr/////";
 basicauth[Utils.encodeUTF8(JAPANESE)] = "Basic am9obmRvZTrjk7/jl7/jm7/jn78=";
 
 // Global var for the server password, read by info_collections(),
 // modified by change_password().
-var server_password;
+let server_password;
 
 function login_handling(handler) {
   return function (request, response) {
diff --git a/services/sync/tests/unit/test_service_startOver.js b/services/sync/tests/unit/test_service_startOver.js
index 899420548..6fb0a66d7 100644
--- a/services/sync/tests/unit/test_service_startOver.js
+++ b/services/sync/tests/unit/test_service_startOver.js
@@ -28,7 +28,7 @@ function run_test() {
   run_next_test();
 }
 
-add_identity_test(this, function* test_resetLocalData() {
+add_identity_test(this, function test_resetLocalData() {
   yield configureIdentity();
   Service.status.enforceBackoff = true;
   Service.status.backoffInterval = 42;
diff --git a/services/sync/tests/unit/test_service_startup.js b/services/sync/tests/unit/test_service_startup.js
index 5148f6d13..6ced39da9 100644
--- a/services/sync/tests/unit/test_service_startup.js
+++ b/services/sync/tests/unit/test_service_startup.js
@@ -10,7 +10,6 @@ Svc.Prefs.set("registerEngines", "Tab,Bookmarks,Form,History");
 Cu.import("resource://services-sync/service.js");
 
 function run_test() {
-  validate_all_future_pings();
   _("When imported, Service.onStartup is called");
   initTestLogging("Trace");
 
@@ -21,7 +20,7 @@ function run_test() {
 
   // Test fixtures
   Service.identity.username = "johndoe";
-  do_check_true(xps.enabled);
+  do_check_false(xps.enabled);
 
   Cu.import("resource://services-sync/service.js");
 
@@ -30,7 +29,7 @@ function run_test() {
 
   _("Engines are registered.");
   let engines = Service.engineManager.getAll();
-  do_check_true(Utils.deepEquals(engines.map(engine => engine.name),
+  do_check_true(Utils.deepEquals([engine.name for each (engine in engines)],
                                  ['tabs', 'bookmarks', 'forms', 'history']));
 
   _("Observers are notified of startup");
@@ -46,4 +45,10 @@ function run_test() {
     Svc.Prefs.resetBranch("");
     do_test_finished();
   });
+
+  do_check_false(xps.enabled);
+
+  Service.identity.account = "johndoe";
+  Service.clusterURL = "http://localhost/";
+  do_check_true(xps.enabled);
 }
diff --git a/services/sync/tests/unit/test_service_sync_locked.js b/services/sync/tests/unit/test_service_sync_locked.js
index ee952c7ee..e2cbbfa92 100644
--- a/services/sync/tests/unit/test_service_sync_locked.js
+++ b/services/sync/tests/unit/test_service_sync_locked.js
@@ -5,17 +5,14 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
 function run_test() {
-  validate_all_future_pings();
   let debug = [];
   let info  = [];
 
   function augmentLogger(old) {
     let d = old.debug;
     let i = old.info;
-    // For the purposes of this test we don't need to do full formatting
-    // of the 2nd param, as the ones we care about are always strings.
-    old.debug = function(m, p) { debug.push(p ? m + ": " + p : m); d.call(old, m, p); }
-    old.info  = function(m, p) { info.push(p ? m + ": " + p : m);  i.call(old, m, p); }
+    old.debug = function(m) { debug.push(m); d.call(old, m); }
+    old.info  = function(m) { info.push(m);  i.call(old, m); }
     return old;
   }
 
@@ -31,7 +28,9 @@ function run_test() {
   Service.sync();
   Service._locked = false;
 
-  do_check_true(debug[debug.length - 2].startsWith("Exception calling WrappedLock: Could not acquire lock. Label: \"service.js: login\"."));
-  do_check_eq(info[info.length - 1], "Cannot start sync: already syncing?");
+  do_check_eq(debug[debug.length - 2],
+              "Exception: Could not acquire lock. Label: \"service.js: login\". No traceback available");
+  do_check_eq(info[info.length - 1],
+              "Cannot start sync: already syncing?");
 }
 
diff --git a/services/sync/tests/unit/test_service_sync_remoteSetup.js b/services/sync/tests/unit/test_service_sync_remoteSetup.js
index 83dbf3cd7..852ba64d5 100644
--- a/services/sync/tests/unit/test_service_sync_remoteSetup.js
+++ b/services/sync/tests/unit/test_service_sync_remoteSetup.js
@@ -10,7 +10,6 @@ Cu.import("resource://testing-common/services/sync/fakeservices.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
 function run_test() {
-  validate_all_future_pings();
   let logger = Log.repository.rootLogger;
   Log.repository.rootLogger.addAppender(new Log.DumpAppender());
 
@@ -54,27 +53,15 @@ function run_test() {
     return_timestamp(request, response, ts);
   }
 
-  const GLOBAL_PATH = "/1.1/johndoe/storage/meta/global";
-  const INFO_PATH = "/1.1/johndoe/info/collections";
-
-  let handlers = {
+  let server = httpd_setup({
     "/1.1/johndoe/storage": storageHandler,
     "/1.1/johndoe/storage/crypto/keys": upd("crypto", keysWBO.handler()),
     "/1.1/johndoe/storage/crypto": upd("crypto", cryptoColl.handler()),
     "/1.1/johndoe/storage/clients": upd("clients", clients.handler()),
-    "/1.1/johndoe/storage/meta": upd("meta", wasCalledHandler(metaColl)),
     "/1.1/johndoe/storage/meta/global": upd("meta", wasCalledHandler(meta_global)),
+    "/1.1/johndoe/storage/meta": upd("meta", wasCalledHandler(metaColl)),
     "/1.1/johndoe/info/collections": collectionsHelper.handler
-  };
-
-  function mockHandler(path, mock) {
-    server.registerPathHandler(path, mock(handlers[path]));
-    return {
-      restore() { server.registerPathHandler(path, handlers[path]); }
-    }
-  }
-
-  let server = httpd_setup(handlers);
+  });
 
   try {
     _("Log in.");
@@ -102,63 +89,6 @@ function run_test() {
     Service.recordManager.get(Service.metaURL).payload.syncID = "foobar";
     do_check_true(Service._remoteSetup());
 
-    let returnStatusCode = (method, code) => (oldMethod) => (req, res) => {
-      if (req.method === method) {
-        res.setStatusLine(req.httpVersion, code, "");
-      } else {
-        oldMethod(req, res);
-      }
-    };
-
-    let mock = mockHandler(GLOBAL_PATH, returnStatusCode("GET", 401));
-    Service.recordManager.del(Service.metaURL);
-    _("Checking that remoteSetup returns false on 401 on first get /meta/global.");
-    do_check_false(Service._remoteSetup());
-    mock.restore();
-
-    Service.login("johndoe", "ilovejane", syncKey);
-    mock = mockHandler(GLOBAL_PATH, returnStatusCode("GET", 503));
-    Service.recordManager.del(Service.metaURL);
-    _("Checking that remoteSetup returns false on 503 on first get /meta/global.");
-    do_check_false(Service._remoteSetup());
-    do_check_eq(Service.status.sync, METARECORD_DOWNLOAD_FAIL);
-    mock.restore();
-
-    mock = mockHandler(GLOBAL_PATH, returnStatusCode("GET", 404));
-    Service.recordManager.del(Service.metaURL);
-    _("Checking that remoteSetup recovers on 404 on first get /meta/global.");
-    do_check_true(Service._remoteSetup());
-    mock.restore();
-
-    let makeOutdatedMeta = () => {
-      Service.metaModified = 0;
-      let infoResponse = Service._fetchInfo();
-      return {
-        status: infoResponse.status,
-        obj: {
-          crypto: infoResponse.obj.crypto,
-          clients: infoResponse.obj.clients,
-          meta: 1
-        }
-      };
-    }
-
-    _("Checking that remoteSetup recovers on 404 on get /meta/global after clear cached one.");
-    mock = mockHandler(GLOBAL_PATH, returnStatusCode("GET", 404));
-    Service.recordManager.set(Service.metaURL, { isNew: false });
-    do_check_true(Service._remoteSetup(makeOutdatedMeta()));
-    mock.restore();
-
-    _("Checking that remoteSetup returns false on 503 on get /meta/global after clear cached one.");
-    mock = mockHandler(GLOBAL_PATH, returnStatusCode("GET", 503));
-    Service.status.sync = "";
-    Service.recordManager.set(Service.metaURL, { isNew: false });
-    do_check_false(Service._remoteSetup(makeOutdatedMeta()));
-    do_check_eq(Service.status.sync, "");
-    mock.restore();
-
-    metaColl.delete({});
-
     _("Do an initial sync.");
     let beforeSync = Date.now()/1000;
     Service.sync();
@@ -230,6 +160,7 @@ function run_test() {
 
     do_check_false(Service.verifyAndFetchSymmetricKeys());
     do_check_eq(Service.status.login, LOGIN_FAILED_INVALID_PASSPHRASE);
+
   } finally {
     Svc.Prefs.resetBranch("");
     server.stop(do_test_finished);
diff --git a/services/sync/tests/unit/test_service_sync_specified.js b/services/sync/tests/unit/test_service_sync_specified.js
deleted file mode 100644
index 7cb0f9d9c..000000000
--- a/services/sync/tests/unit/test_service_sync_specified.js
+++ /dev/null
@@ -1,160 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/clients.js");
-Cu.import("resource://services-sync/record.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/util.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-
-initTestLogging();
-Service.engineManager.clear();
-
-let syncedEngines = []
-
-function SteamEngine() {
-  SyncEngine.call(this, "Steam", Service);
-}
-SteamEngine.prototype = {
-  __proto__: SyncEngine.prototype,
-  _sync: function _sync() {
-    syncedEngines.push(this.name);
-  }
-};
-Service.engineManager.register(SteamEngine);
-
-function StirlingEngine() {
-  SyncEngine.call(this, "Stirling", Service);
-}
-StirlingEngine.prototype = {
-  __proto__: SteamEngine.prototype,
-  _sync: function _sync() {
-    syncedEngines.push(this.name);
-  }
-};
-Service.engineManager.register(StirlingEngine);
-
-// Tracking info/collections.
-var collectionsHelper = track_collections_helper();
-var upd = collectionsHelper.with_updated_collection;
-
-function sync_httpd_setup(handlers) {
-
-  handlers["/1.1/johndoe/info/collections"] = collectionsHelper.handler;
-  delete collectionsHelper.collections.crypto;
-  delete collectionsHelper.collections.meta;
-
-  let cr = new ServerWBO("keys");
-  handlers["/1.1/johndoe/storage/crypto/keys"] =
-    upd("crypto", cr.handler());
-
-  let cl = new ServerCollection();
-  handlers["/1.1/johndoe/storage/clients"] =
-    upd("clients", cl.handler());
-
-  return httpd_setup(handlers);
-}
-
-function setUp() {
-  syncedEngines = [];
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  engine.syncPriority = 1;
-
-  engine = Service.engineManager.get("stirling");
-  engine.enabled = true;
-  engine.syncPriority = 2;
-
-  let server = sync_httpd_setup({
-    "/1.1/johndoe/storage/meta/global": new ServerWBO("global", {}).handler(),
-  });
-  new SyncTestingInfrastructure(server, "johndoe", "ilovejane",
-                                "abcdeabcdeabcdeabcdeabcdea");
-  return server;
-}
-
-function run_test() {
-  initTestLogging("Trace");
-  validate_all_future_pings();
-  Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
-  Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
-
-  run_next_test();
-}
-
-add_test(function test_noEngines() {
-  _("Test: An empty array of engines to sync does nothing.");
-  let server = setUp();
-
-  try {
-    _("Sync with no engines specified.");
-    Service.sync([]);
-    deepEqual(syncedEngines, [], "no engines were synced");
-
-  } finally {
-    Service.startOver();
-    server.stop(run_next_test);
-  }
-});
-
-add_test(function test_oneEngine() {
-  _("Test: Only one engine is synced.");
-  let server = setUp();
-
-  try {
-
-    _("Sync with 1 engine specified.");
-    Service.sync(["steam"]);
-    deepEqual(syncedEngines, ["steam"])
-
-  } finally {
-    Service.startOver();
-    server.stop(run_next_test);
-  }
-});
-
-add_test(function test_bothEnginesSpecified() {
-  _("Test: All engines are synced when specified in the correct order (1).");
-  let server = setUp();
-
-  try {
-    _("Sync with both engines specified.");
-    Service.sync(["steam", "stirling"]);
-    deepEqual(syncedEngines, ["steam", "stirling"])
-
-  } finally {
-    Service.startOver();
-    server.stop(run_next_test);
-  }
-});
-
-add_test(function test_bothEnginesSpecified() {
-  _("Test: All engines are synced when specified in the correct order (2).");
-  let server = setUp();
-
-  try {
-    _("Sync with both engines specified.");
-    Service.sync(["stirling", "steam"]);
-    deepEqual(syncedEngines, ["stirling", "steam"])
-
-  } finally {
-    Service.startOver();
-    server.stop(run_next_test);
-  }
-});
-
-add_test(function test_bothEnginesDefault() {
-  _("Test: All engines are synced when nothing is specified.");
-  let server = setUp();
-
-  try {
-    Service.sync();
-    deepEqual(syncedEngines, ["steam", "stirling"])
-
-  } finally {
-    Service.startOver();
-    server.stop(run_next_test);
-  }
-});
diff --git a/services/sync/tests/unit/test_service_sync_updateEnabledEngines.js b/services/sync/tests/unit/test_service_sync_updateEnabledEngines.js
index ee1800fd3..c945cb6c2 100644
--- a/services/sync/tests/unit/test_service_sync_updateEnabledEngines.js
+++ b/services/sync/tests/unit/test_service_sync_updateEnabledEngines.js
@@ -41,15 +41,13 @@ function StirlingEngine() {
 StirlingEngine.prototype = {
   __proto__: SteamEngine.prototype,
   // This engine's enabled state is the same as the SteamEngine's.
-  get prefName() {
-    return "steam";
-  }
+  get prefName() "steam"
 };
 Service.engineManager.register(StirlingEngine);
 
 // Tracking info/collections.
-var collectionsHelper = track_collections_helper();
-var upd = collectionsHelper.with_updated_collection;
+let collectionsHelper = track_collections_helper();
+let upd = collectionsHelper.with_updated_collection;
 
 function sync_httpd_setup(handlers) {
 
@@ -86,7 +84,6 @@ function run_test() {
   initTestLogging("Trace");
   Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
   Log.repository.getLogger("Sync.ErrorHandler").level = Log.Level.Trace;
-  validate_all_future_pings();
 
   run_next_test();
 }
diff --git a/services/sync/tests/unit/test_service_wipeServer.js b/services/sync/tests/unit/test_service_wipeServer.js
index 9320f4b88..3fc45cf86 100644
--- a/services/sync/tests/unit/test_service_wipeServer.js
+++ b/services/sync/tests/unit/test_service_wipeServer.js
@@ -31,7 +31,7 @@ FakeCollection.prototype = {
   }
 };
 
-function* setUpTestFixtures(server) {
+function setUpTestFixtures(server) {
   let cryptoService = new FakeCryptoService();
 
   Service.serverURL = server.baseURI + "/";
@@ -52,7 +52,7 @@ function promiseStopServer(server) {
   return deferred.promise;
 }
 
-add_identity_test(this, function* test_wipeServer_list_success() {
+add_identity_test(this, function test_wipeServer_list_success() {
   _("Service.wipeServer() deletes collections given as argument.");
 
   let steam_coll = new FakeCollection();
@@ -86,7 +86,7 @@ add_identity_test(this, function* test_wipeServer_list_success() {
   }
 });
 
-add_identity_test(this, function* test_wipeServer_list_503() {
+add_identity_test(this, function test_wipeServer_list_503() {
   _("Service.wipeServer() deletes collections given as argument.");
 
   let steam_coll = new FakeCollection();
@@ -127,7 +127,7 @@ add_identity_test(this, function* test_wipeServer_list_503() {
   }
 });
 
-add_identity_test(this, function* test_wipeServer_all_success() {
+add_identity_test(this, function test_wipeServer_all_success() {
   _("Service.wipeServer() deletes all the things.");
 
   /**
@@ -157,7 +157,7 @@ add_identity_test(this, function* test_wipeServer_all_success() {
   Svc.Prefs.resetBranch("");
 });
 
-add_identity_test(this, function* test_wipeServer_all_404() {
+add_identity_test(this, function test_wipeServer_all_404() {
   _("Service.wipeServer() accepts a 404.");
 
   /**
@@ -189,7 +189,7 @@ add_identity_test(this, function* test_wipeServer_all_404() {
   Svc.Prefs.resetBranch("");
 });
 
-add_identity_test(this, function* test_wipeServer_all_503() {
+add_identity_test(this, function test_wipeServer_all_503() {
   _("Service.wipeServer() throws if it encounters a non-200/404 response.");
 
   /**
@@ -221,7 +221,7 @@ add_identity_test(this, function* test_wipeServer_all_503() {
   Svc.Prefs.resetBranch("");
 });
 
-add_identity_test(this, function* test_wipeServer_all_connectionRefused() {
+add_identity_test(this, function test_wipeServer_all_connectionRefused() {
   _("Service.wipeServer() throws if it encounters a network problem.");
   let server = httpd_setup({});
   yield setUpTestFixtures(server);
diff --git a/services/sync/tests/unit/test_status.js b/services/sync/tests/unit/test_status.js
index 378aafe90..bc2d67f42 100644
--- a/services/sync/tests/unit/test_status.js
+++ b/services/sync/tests/unit/test_status.js
@@ -18,9 +18,9 @@ function run_test() {
 
 
   // Check login status
-  for (let code of [LOGIN_FAILED_NO_USERNAME,
-                    LOGIN_FAILED_NO_PASSWORD,
-                    LOGIN_FAILED_NO_PASSPHRASE]) {
+  for each (let code in [LOGIN_FAILED_NO_USERNAME,
+                         LOGIN_FAILED_NO_PASSWORD,
+                         LOGIN_FAILED_NO_PASSPHRASE]) {
     Status.login = code;
     do_check_eq(Status.login, code);
     do_check_eq(Status.service, CLIENT_NOT_CONFIGURED);
diff --git a/services/sync/tests/unit/test_syncedtabs.js b/services/sync/tests/unit/test_syncedtabs.js
deleted file mode 100644
index fe2cb6d1b..000000000
--- a/services/sync/tests/unit/test_syncedtabs.js
+++ /dev/null
@@ -1,221 +0,0 @@
-/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
- * vim:set ts=2 sw=2 sts=2 et:
-*/
-"use strict";
-
-Cu.import("resource://services-sync/main.js");
-Cu.import("resource://services-sync/SyncedTabs.jsm");
-Cu.import("resource://gre/modules/Log.jsm");
-
-const faviconService = Cc["@mozilla.org/browser/favicon-service;1"]
-                       .getService(Ci.nsIFaviconService);
-
-Log.repository.getLogger("Sync.RemoteTabs").addAppender(new Log.DumpAppender());
-
-// A mock "Tabs" engine which the SyncedTabs module will use instead of the real
-// engine. We pass a constructor that Sync creates.
-function MockTabsEngine() {
-  this.clients = {}; // We'll set this dynamically
-}
-
-MockTabsEngine.prototype = {
-  name: "tabs",
-  enabled: true,
-
-  getAllClients() {
-    return this.clients;
-  },
-
-  getOpenURLs() {
-    return new Set();
-  },
-}
-
-// A clients engine that doesn't need to be a constructor.
-let MockClientsEngine = {
-  clientSettings: null, // Set in `configureClients`.
-
-  isMobile(guid) {
-    if (!guid.endsWith("desktop") && !guid.endsWith("mobile")) {
-      throw new Error("this module expected guids to end with 'desktop' or 'mobile'");
-    }
-    return guid.endsWith("mobile");
-  },
-  remoteClientExists(id) {
-    return this.clientSettings[id] !== false;
-  },
-  getClientName(id) {
-    if (this.clientSettings[id]) {
-      return this.clientSettings[id];
-    }
-    let engine = Weave.Service.engineManager.get("tabs");
-    return engine.clients[id].clientName;
-  },
-}
-
-// Configure Sync with our mock tabs engine and force it to become initialized.
-Services.prefs.setCharPref("services.sync.username", "someone@somewhere.com");
-
-Weave.Service.engineManager.unregister("tabs");
-Weave.Service.engineManager.register(MockTabsEngine);
-Weave.Service.clientsEngine = MockClientsEngine;
-
-// Tell the Sync XPCOM service it is initialized.
-let weaveXPCService = Cc["@mozilla.org/weave/service;1"]
-                        .getService(Ci.nsISupports)
-                        .wrappedJSObject;
-weaveXPCService.ready = true;
-
-function configureClients(clients, clientSettings = {}) {
-  // Configure the instance Sync created.
-  let engine = Weave.Service.engineManager.get("tabs");
-  // each client record is expected to have an id.
-  for (let [guid, client] of Object.entries(clients)) {
-    client.id = guid;
-  }
-  engine.clients = clients;
-  // Apply clients collection overrides.
-  MockClientsEngine.clientSettings = clientSettings;
-  // Send an observer that pretends the engine just finished a sync.
-  Services.obs.notifyObservers(null, "weave:engine:sync:finish", "tabs");
-}
-
-// The tests.
-add_task(function* test_noClients() {
-  // no clients, can't be tabs.
-  yield configureClients({});
-
-  let tabs = yield SyncedTabs.getTabClients();
-  equal(Object.keys(tabs).length, 0);
-});
-
-add_task(function* test_clientWithTabs() {
-  yield configureClients({
-    guid_desktop: {
-      clientName: "My Desktop",
-      tabs: [
-      {
-        urlHistory: ["http://foo.com/"],
-        icon: "http://foo.com/favicon",
-      }],
-    },
-    guid_mobile: {
-      clientName: "My Phone",
-      tabs: [],
-    }
-  });
-
-  let clients = yield SyncedTabs.getTabClients();
-  equal(clients.length, 2);
-  clients.sort((a, b) => { return a.name.localeCompare(b.name);});
-  equal(clients[0].tabs.length, 1);
-  equal(clients[0].tabs[0].url, "http://foo.com/");
-  equal(clients[0].tabs[0].icon, "http://foo.com/favicon");
-  // second client has no tabs.
-  equal(clients[1].tabs.length, 0);
-});
-
-add_task(function* test_staleClientWithTabs() {
-  yield configureClients({
-    guid_desktop: {
-      clientName: "My Desktop",
-      tabs: [
-      {
-        urlHistory: ["http://foo.com/"],
-        icon: "http://foo.com/favicon",
-      }],
-    },
-    guid_mobile: {
-      clientName: "My Phone",
-      tabs: [],
-    },
-    guid_stale_mobile: {
-      clientName: "My Deleted Phone",
-      tabs: [],
-    },
-    guid_stale_desktop: {
-      clientName: "My Deleted Laptop",
-      tabs: [
-      {
-        urlHistory: ["https://bar.com/"],
-        icon: "https://bar.com/favicon",
-      }],
-    },
-    guid_stale_name_desktop: {
-      clientName: "My Generic Device",
-      tabs: [
-      {
-        urlHistory: ["https://example.edu/"],
-        icon: "https://example.edu/favicon",
-      }],
-    },
-  }, {
-    guid_stale_mobile: false,
-    guid_stale_desktop: false,
-    // We should always use the device name from the clients collection, instead
-    // of the possibly stale tabs collection.
-    guid_stale_name_desktop: "My Laptop",
-  });
-  let clients = yield SyncedTabs.getTabClients();
-  clients.sort((a, b) => { return a.name.localeCompare(b.name);});
-  equal(clients.length, 3);
-  equal(clients[0].name, "My Desktop");
-  equal(clients[0].tabs.length, 1);
-  equal(clients[0].tabs[0].url, "http://foo.com/");
-  equal(clients[1].name, "My Laptop");
-  equal(clients[1].tabs.length, 1);
-  equal(clients[1].tabs[0].url, "https://example.edu/");
-  equal(clients[2].name, "My Phone");
-  equal(clients[2].tabs.length, 0);
-});
-
-add_task(function* test_clientWithTabsIconsDisabled() {
-  Services.prefs.setBoolPref("services.sync.syncedTabs.showRemoteIcons", false);
-  yield configureClients({
-    guid_desktop: {
-      clientName: "My Desktop",
-      tabs: [
-      {
-        urlHistory: ["http://foo.com/"],
-        icon: "http://foo.com/favicon",
-      }],
-    },
-  });
-
-  let clients = yield SyncedTabs.getTabClients();
-  equal(clients.length, 1);
-  clients.sort((a, b) => { return a.name.localeCompare(b.name);});
-  equal(clients[0].tabs.length, 1);
-  equal(clients[0].tabs[0].url, "http://foo.com/");
-  // expect the default favicon (empty string) due to the pref being false.
-  equal(clients[0].tabs[0].icon, "");
-  Services.prefs.clearUserPref("services.sync.syncedTabs.showRemoteIcons");
-});
-
-add_task(function* test_filter() {
-  // Nothing matches.
-  yield configureClients({
-    guid_desktop: {
-      clientName: "My Desktop",
-      tabs: [
-      {
-        urlHistory: ["http://foo.com/"],
-        title: "A test page.",
-      },
-      {
-        urlHistory: ["http://bar.com/"],
-        title: "Another page.",
-      }],
-    },
-  });
-
-  let clients = yield SyncedTabs.getTabClients("foo");
-  equal(clients.length, 1);
-  equal(clients[0].tabs.length, 1);
-  equal(clients[0].tabs[0].url, "http://foo.com/");
-  // check it matches the title.
-  clients = yield SyncedTabs.getTabClients("test");
-  equal(clients.length, 1);
-  equal(clients[0].tabs.length, 1);
-  equal(clients[0].tabs[0].url, "http://foo.com/");
-});
diff --git a/services/sync/tests/unit/test_syncengine.js b/services/sync/tests/unit/test_syncengine.js
index 8c01ca048..393e49607 100644
--- a/services/sync/tests/unit/test_syncengine.js
+++ b/services/sync/tests/unit/test_syncengine.js
@@ -10,7 +10,7 @@ function makeSteamEngine() {
   return new SyncEngine('Steam', Service);
 }
 
-var server;
+let server;
 
 function test_url_attributes() {
   _("SyncEngine url attributes");
@@ -35,12 +35,12 @@ function test_syncID() {
     do_check_eq(Svc.Prefs.get("steam.syncID"), undefined);
 
     // Performing the first get on the attribute will generate a new GUID.
-    do_check_eq(engine.syncID, "fake-guid-00");
-    do_check_eq(Svc.Prefs.get("steam.syncID"), "fake-guid-00");
+    do_check_eq(engine.syncID, "fake-guid-0");
+    do_check_eq(Svc.Prefs.get("steam.syncID"), "fake-guid-0");
 
     Svc.Prefs.set("steam.syncID", Utils.makeGUID());
-    do_check_eq(Svc.Prefs.get("steam.syncID"), "fake-guid-01");
-    do_check_eq(engine.syncID, "fake-guid-01");
+    do_check_eq(Svc.Prefs.get("steam.syncID"), "fake-guid-1");
+    do_check_eq(engine.syncID, "fake-guid-1");
   } finally {
     Svc.Prefs.resetBranch("");
   }
diff --git a/services/sync/tests/unit/test_syncengine_sync.js b/services/sync/tests/unit/test_syncengine_sync.js
index 97289962f..6a6d047bf 100644
--- a/services/sync/tests/unit/test_syncengine_sync.js
+++ b/services/sync/tests/unit/test_syncengine_sync.js
@@ -15,22 +15,13 @@ function makeRotaryEngine() {
   return new RotaryEngine(Service);
 }
 
-function clean() {
+function cleanAndGo(server) {
   Svc.Prefs.resetBranch("");
   Svc.Prefs.set("log.logger.engine.rotary", "Trace");
   Service.recordManager.clearCache();
-}
-
-function cleanAndGo(server) {
-  clean();
   server.stop(run_next_test);
 }
 
-function promiseClean(server) {
-  clean();
-  return new Promise(resolve => server.stop(resolve));
-}
-
 function configureService(server, username, password) {
   Service.clusterURL = server.baseURI;
 
@@ -181,7 +172,7 @@ add_test(function test_syncStartup_syncIDMismatchResetsClient() {
   try {
 
     // Confirm initial environment
-    do_check_eq(engine.syncID, 'fake-guid-00');
+    do_check_eq(engine.syncID, 'fake-guid-0');
     do_check_eq(engine._tracker.changedIDs["rekolok"], undefined);
 
     engine.lastSync = Date.now() / 1000;
@@ -676,7 +667,7 @@ add_test(function test_processIncoming_mobile_batchSize() {
 });
 
 
-add_task(function *test_processIncoming_store_toFetch() {
+add_test(function test_processIncoming_store_toFetch() {
   _("If processIncoming fails in the middle of a batch on mobile, state is saved in toFetch and lastSync.");
   Service.identity.username = "foo";
   Svc.Prefs.set("client.type", "mobile");
@@ -723,10 +714,11 @@ add_task(function *test_processIncoming_store_toFetch() {
 
     let error;
     try {
-      yield sync_engine_and_validate_telem(engine, true);
+      engine.sync();
     } catch (ex) {
       error = ex;
     }
+    do_check_true(!!error);
 
     // Only the first two batches have been applied.
     do_check_eq(Object.keys(engine._store.items).length,
@@ -738,7 +730,7 @@ add_task(function *test_processIncoming_store_toFetch() {
     do_check_eq(engine.lastSync, collection.wbo("record-no-99").modified);
 
   } finally {
-    yield promiseClean(server);
+    cleanAndGo(server);
   }
 });
 
@@ -1229,7 +1221,7 @@ add_test(function test_processIncoming_failed_records() {
 });
 
 
-add_task(function *test_processIncoming_decrypt_failed() {
+add_test(function test_processIncoming_decrypt_failed() {
   _("Ensure that records failing to decrypt are either replaced or refetched.");
 
   Service.identity.username = "foo";
@@ -1288,10 +1280,7 @@ add_task(function *test_processIncoming_decrypt_failed() {
     });
 
     engine.lastSync = collection.wbo("nojson").modified - 1;
-    let ping = yield sync_engine_and_validate_telem(engine, true);
-    do_check_eq(ping.engines[0].incoming.applied, 2);
-    do_check_eq(ping.engines[0].incoming.failed, 4);
-    do_check_eq(ping.engines[0].incoming.newFailed, 4);
+    engine.sync();
 
     do_check_eq(engine.previousFailed.length, 4);
     do_check_eq(engine.previousFailed[0], "nojson");
@@ -1305,7 +1294,7 @@ add_task(function *test_processIncoming_decrypt_failed() {
     do_check_eq(observerSubject.failed, 4);
 
   } finally {
-    yield promiseClean(server);
+    cleanAndGo(server);
   }
 });
 
@@ -1369,7 +1358,7 @@ add_test(function test_uploadOutgoing_toEmptyServer() {
 });
 
 
-add_task(function *test_uploadOutgoing_failed() {
+add_test(function test_uploadOutgoing_failed() {
   _("SyncEngine._uploadOutgoing doesn't clear the tracker of objects that failed to upload.");
 
   Service.identity.username = "foo";
@@ -1412,7 +1401,7 @@ add_task(function *test_uploadOutgoing_failed() {
     do_check_eq(engine._tracker.changedIDs['peppercorn'], PEPPERCORN_CHANGED);
 
     engine.enabled = true;
-    yield sync_engine_and_validate_telem(engine, true);
+    engine.sync();
 
     // Local timestamp has been set.
     do_check_true(engine.lastSyncLocal > 0);
@@ -1427,14 +1416,11 @@ add_task(function *test_uploadOutgoing_failed() {
     do_check_eq(engine._tracker.changedIDs['peppercorn'], PEPPERCORN_CHANGED);
 
   } finally {
-    yield promiseClean(server);
+    cleanAndGo(server);
   }
 });
 
-/* A couple of "functional" tests to ensure we split records into appropriate
-   POST requests. More comprehensive unit-tests for this "batching" are in
-   test_postqueue.js.
-*/
+
 add_test(function test_uploadOutgoing_MAX_UPLOAD_RECORDS() {
   _("SyncEngine._uploadOutgoing uploads in batches of MAX_UPLOAD_RECORDS");
 
@@ -1444,18 +1430,9 @@ add_test(function test_uploadOutgoing_MAX_UPLOAD_RECORDS() {
   // Let's count how many times the client posts to the server
   var noOfUploads = 0;
   collection.post = (function(orig) {
-    return function(data, request) {
-      // This test doesn't arrange for batch semantics - so we expect the
-      // first request to come in with batch=true and the others to have no
-      // batch related headers at all (as the first response did not provide
-      // a batch ID)
-      if (noOfUploads == 0) {
-        do_check_eq(request.queryString, "batch=true");
-      } else {
-        do_check_eq(request.queryString, "");
-      }
+    return function() {
       noOfUploads++;
-      return orig.call(this, data, request);
+      return orig.apply(this, arguments);
     };
   }(collection.post));
 
@@ -1500,44 +1477,6 @@ add_test(function test_uploadOutgoing_MAX_UPLOAD_RECORDS() {
   }
 });
 
-add_test(function test_uploadOutgoing_largeRecords() {
-  _("SyncEngine._uploadOutgoing throws on records larger than MAX_UPLOAD_BYTES");
-
-  Service.identity.username = "foo";
-  let collection = new ServerCollection();
-
-  let engine = makeRotaryEngine();
-  engine.allowSkippedRecord = false;
-  engine._store.items["large-item"] = "Y".repeat(MAX_UPLOAD_BYTES*2);
-  engine._tracker.addChangedID("large-item", 0);
-  collection.insert("large-item");
-
-
-  let meta_global = Service.recordManager.set(engine.metaURL,
-                                              new WBORecord(engine.metaURL));
-  meta_global.payload.engines = {rotary: {version: engine.version,
-                                         syncID: engine.syncID}};
-
-  let server = sync_httpd_setup({
-      "/1.1/foo/storage/rotary": collection.handler()
-  });
-
-  let syncTesting = new SyncTestingInfrastructure(server);
-
-  try {
-    engine._syncStartup();
-    let error = null;
-    try {
-      engine._uploadOutgoing();
-    } catch (e) {
-      error = e;
-    }
-    ok(!!error);
-  } finally {
-    cleanAndGo(server);
-  }
-});
-
 
 add_test(function test_syncFinish_noDelete() {
   _("SyncEngine._syncFinish resets tracker's score");
@@ -1667,7 +1606,7 @@ add_test(function test_syncFinish_deleteLotsInBatches() {
 });
 
 
-add_task(function *test_sync_partialUpload() {
+add_test(function test_sync_partialUpload() {
   _("SyncEngine.sync() keeps changedIDs that couldn't be uploaded.");
 
   Service.identity.username = "foo";
@@ -1715,12 +1654,11 @@ add_task(function *test_sync_partialUpload() {
     engine.enabled = true;
     let error;
     try {
-      yield sync_engine_and_validate_telem(engine, true);
+      engine.sync();
     } catch (ex) {
       error = ex;
     }
-
-    ok(!!error);
+    do_check_true(!!error);
 
     // The timestamp has been updated.
     do_check_true(engine.lastSyncLocal > 456);
@@ -1738,7 +1676,7 @@ add_task(function *test_sync_partialUpload() {
     }
 
   } finally {
-    yield promiseClean(server);
+    cleanAndGo(server);
   }
 });
 
diff --git a/services/sync/tests/unit/test_syncscheduler.js b/services/sync/tests/unit/test_syncscheduler.js
index 730a3f996..d496b8838 100644
--- a/services/sync/tests/unit/test_syncscheduler.js
+++ b/services/sync/tests/unit/test_syncscheduler.js
@@ -26,13 +26,8 @@ CatapultEngine.prototype = {
 
 Service.engineManager.register(CatapultEngine);
 
-var scheduler = new SyncScheduler(Service);
-var clientsEngine = Service.clientsEngine;
-
-// Don't remove stale clients when syncing. This is a test-only workaround
-// that lets us add clients directly to the store, without losing them on
-// the next sync.
-clientsEngine._removeRemoteClient = id => {};
+let scheduler = new SyncScheduler(Service);
+let clientsEngine = Service.clientsEngine;
 
 function sync_httpd_setup() {
   let global = new ServerWBO("global", {
@@ -74,7 +69,6 @@ function setUp(server) {
 function cleanUpAndGo(server) {
   let deferred = Promise.defer();
   Utils.nextTick(function () {
-    clientsEngine._store.wipe();
     Service.startOver();
     if (server) {
       server.stop(deferred.resolve);
@@ -90,7 +84,6 @@ function run_test() {
 
   Log.repository.getLogger("Sync.Service").level = Log.Level.Trace;
   Log.repository.getLogger("Sync.scheduler").level = Log.Level.Trace;
-  validate_all_future_pings();
 
   // The scheduler checks Weave.fxaEnabled to determine whether to use
   // FxA defaults or legacy defaults.  As .fxaEnabled checks the username, we
@@ -148,33 +141,22 @@ add_test(function test_prefAttributes() {
               Svc.Prefs.get("scheduler.immediateInterval") * 1000);
 
   _("Custom values for prefs will take effect after a restart.");
-  Svc.Prefs.set("scheduler.sync11.singleDeviceInterval", 420);
-  Svc.Prefs.set("scheduler.idleInterval", 230);
-  Svc.Prefs.set("scheduler.activeInterval", 180);
+  Svc.Prefs.set("scheduler.sync11.singleDeviceInterval", 42);
+  Svc.Prefs.set("scheduler.idleInterval", 23);
+  Svc.Prefs.set("scheduler.activeInterval", 18);
   Svc.Prefs.set("scheduler.immediateInterval", 31415);
   scheduler.setDefaults();
-  do_check_eq(scheduler.idleInterval, 230000);
-  do_check_eq(scheduler.singleDeviceInterval, 420000);
-  do_check_eq(scheduler.activeInterval, 180000);
+  do_check_eq(scheduler.idleInterval, 23000);
+  do_check_eq(scheduler.singleDeviceInterval, 42000);
+  do_check_eq(scheduler.activeInterval, 18000);
   do_check_eq(scheduler.immediateInterval, 31415000);
 
-  _("Custom values for interval prefs can't be less than 60 seconds.");
-  Svc.Prefs.set("scheduler.sync11.singleDeviceInterval", 42);
-  Svc.Prefs.set("scheduler.idleInterval", 50);
-  Svc.Prefs.set("scheduler.activeInterval", 50);
-  Svc.Prefs.set("scheduler.immediateInterval", 10);
-  scheduler.setDefaults();
-  do_check_eq(scheduler.idleInterval, 60000);
-  do_check_eq(scheduler.singleDeviceInterval, 60000);
-  do_check_eq(scheduler.activeInterval, 60000);
-  do_check_eq(scheduler.immediateInterval, 60000);
-
   Svc.Prefs.resetBranch("");
   scheduler.setDefaults();
   run_next_test();
 });
 
-add_identity_test(this, function* test_updateClientMode() {
+add_identity_test(this, function test_updateClientMode() {
   _("Test updateClientMode adjusts scheduling attributes based on # of clients appropriately");
   do_check_eq(scheduler.syncThreshold, SINGLE_USER_THRESHOLD);
   do_check_eq(scheduler.syncInterval, scheduler.singleDeviceInterval);
@@ -204,7 +186,7 @@ add_identity_test(this, function* test_updateClientMode() {
   yield cleanUpAndGo();
 });
 
-add_identity_test(this, function* test_masterpassword_locked_retry_interval() {
+add_identity_test(this, function test_masterpassword_locked_retry_interval() {
   _("Test Status.login = MASTER_PASSWORD_LOCKED results in reschedule at MASTER_PASSWORD interval");
   let loginFailed = false;
   Svc.Obs.add("weave:service:login:error", function onLoginError() {
@@ -241,7 +223,7 @@ add_identity_test(this, function* test_masterpassword_locked_retry_interval() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_calculateBackoff() {
+add_identity_test(this, function test_calculateBackoff() {
   do_check_eq(Status.backoffInterval, 0);
 
   // Test no interval larger than the maximum backoff is used if
@@ -263,7 +245,7 @@ add_identity_test(this, function* test_calculateBackoff() {
   yield cleanUpAndGo();
 });
 
-add_identity_test(this, function* test_scheduleNextSync_nowOrPast() {
+add_identity_test(this, function test_scheduleNextSync_nowOrPast() {
   let deferred = Promise.defer();
   Svc.Obs.add("weave:service:sync:finish", function onSyncFinish() {
     Svc.Obs.remove("weave:service:sync:finish", onSyncFinish);
@@ -278,7 +260,7 @@ add_identity_test(this, function* test_scheduleNextSync_nowOrPast() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_scheduleNextSync_future_noBackoff() {
+add_identity_test(this, function test_scheduleNextSync_future_noBackoff() {
   _("scheduleNextSync() uses the current syncInterval if no interval is provided.");
   // Test backoffInterval is 0 as expected.
   do_check_eq(Status.backoffInterval, 0);
@@ -327,7 +309,7 @@ add_identity_test(this, function* test_scheduleNextSync_future_noBackoff() {
   yield cleanUpAndGo();
 });
 
-add_identity_test(this, function* test_scheduleNextSync_future_backoff() {
+add_identity_test(this, function test_scheduleNextSync_future_backoff() {
  _("scheduleNextSync() will honour backoff in all scheduling requests.");
   // Let's take a backoff interval that's bigger than the default sync interval.
   const BACKOFF = 7337;
@@ -377,7 +359,7 @@ add_identity_test(this, function* test_scheduleNextSync_future_backoff() {
   yield cleanUpAndGo();
 });
 
-add_identity_test(this, function* test_handleSyncError() {
+add_identity_test(this, function test_handleSyncError() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -443,7 +425,7 @@ add_identity_test(this, function* test_handleSyncError() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_client_sync_finish_updateClientMode() {
+add_identity_test(this, function test_client_sync_finish_updateClientMode() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -477,7 +459,7 @@ add_identity_test(this, function* test_client_sync_finish_updateClientMode() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_autoconnect_nextSync_past() {
+add_identity_test(this, function test_autoconnect_nextSync_past() {
   let deferred = Promise.defer();
   // nextSync will be 0 by default, so it's way in the past.
 
@@ -493,7 +475,7 @@ add_identity_test(this, function* test_autoconnect_nextSync_past() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_autoconnect_nextSync_future() {
+add_identity_test(this, function test_autoconnect_nextSync_future() {
   let deferred = Promise.defer();
   let previousSync = Date.now() + scheduler.syncInterval / 2;
   scheduler.nextSync = previousSync;
@@ -522,7 +504,7 @@ add_identity_test(this, function* test_autoconnect_nextSync_future() {
 
 // XXX - this test can't be run with the browserid identity as it relies
 // on the syncKey getter behaving in a certain way...
-add_task(function* test_autoconnect_mp_locked() {
+add_task(function test_autoconnect_mp_locked() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -559,7 +541,7 @@ add_task(function* test_autoconnect_mp_locked() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_no_autoconnect_during_wizard() {
+add_identity_test(this, function test_no_autoconnect_during_wizard() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -582,7 +564,7 @@ add_identity_test(this, function* test_no_autoconnect_during_wizard() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_no_autoconnect_status_not_ok() {
+add_identity_test(this, function test_no_autoconnect_status_not_ok() {
   let server = sync_httpd_setup();
 
   // Ensure we don't actually try to sync (or log in for that matter).
@@ -605,7 +587,7 @@ add_identity_test(this, function* test_no_autoconnect_status_not_ok() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_autoconnectDelay_pref() {
+add_identity_test(this, function test_autoconnectDelay_pref() {
   let deferred = Promise.defer();
   Svc.Obs.add("weave:service:sync:finish", function onSyncFinish() {
     Svc.Obs.remove("weave:service:sync:finish", onSyncFinish);
@@ -625,7 +607,7 @@ add_identity_test(this, function* test_autoconnectDelay_pref() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_idle_adjustSyncInterval() {
+add_identity_test(this, function test_idle_adjustSyncInterval() {
   // Confirm defaults.
   do_check_eq(scheduler.idle, false);
 
@@ -645,7 +627,7 @@ add_identity_test(this, function* test_idle_adjustSyncInterval() {
   yield cleanUpAndGo();
 });
 
-add_identity_test(this, function* test_back_triggersSync() {
+add_identity_test(this, function test_back_triggersSync() {
   // Confirm defaults.
   do_check_false(scheduler.idle);
   do_check_eq(Status.backoffInterval, 0);
@@ -668,7 +650,7 @@ add_identity_test(this, function* test_back_triggersSync() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_active_triggersSync_observesBackoff() {
+add_identity_test(this, function test_active_triggersSync_observesBackoff() {
   // Confirm defaults.
   do_check_false(scheduler.idle);
 
@@ -699,7 +681,7 @@ add_identity_test(this, function* test_active_triggersSync_observesBackoff() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_back_debouncing() {
+add_identity_test(this, function test_back_debouncing() {
   _("Ensure spurious back-then-idle events, as observed on OS X, don't trigger a sync.");
 
   // Confirm defaults.
@@ -727,7 +709,7 @@ add_identity_test(this, function* test_back_debouncing() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_no_sync_node() {
+add_identity_test(this, function test_no_sync_node() {
   // Test when Status.sync == NO_SYNC_NODE_FOUND
   // it is not overwritten on sync:finish
   let server = sync_httpd_setup();
@@ -742,7 +724,7 @@ add_identity_test(this, function* test_no_sync_node() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_sync_failed_partial_500s() {
+add_identity_test(this, function test_sync_failed_partial_500s() {
   _("Test a 5xx status calls handleSyncError.");
   scheduler._syncErrors = MAX_ERROR_COUNT_BEFORE_BACKOFF;
   let server = sync_httpd_setup();
@@ -769,7 +751,7 @@ add_identity_test(this, function* test_sync_failed_partial_500s() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_sync_failed_partial_400s() {
+add_identity_test(this, function test_sync_failed_partial_400s() {
   _("Test a non-5xx status doesn't call handleSyncError.");
   scheduler._syncErrors = MAX_ERROR_COUNT_BEFORE_BACKOFF;
   let server = sync_httpd_setup();
@@ -799,7 +781,7 @@ add_identity_test(this, function* test_sync_failed_partial_400s() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_sync_X_Weave_Backoff() {
+add_identity_test(this, function test_sync_X_Weave_Backoff() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -842,9 +824,9 @@ add_identity_test(this, function* test_sync_X_Weave_Backoff() {
   Service.sync();
 
   do_check_true(Status.backoffInterval >= BACKOFF * 1000);
-  // Allowing 3 seconds worth of of leeway between when Status.minimumNextSync
+  // Allowing 1 second worth of of leeway between when Status.minimumNextSync
   // was set and when this line gets executed.
-  let minimumExpectedDelay = (BACKOFF - 3) * 1000;
+  let minimumExpectedDelay = (BACKOFF - 1) * 1000;
   do_check_true(Status.minimumNextSync >= Date.now() + minimumExpectedDelay);
 
   // Verify that the next sync is actually going to wait that long.
@@ -854,7 +836,7 @@ add_identity_test(this, function* test_sync_X_Weave_Backoff() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_sync_503_Retry_After() {
+add_identity_test(this, function test_sync_503_Retry_After() {
   let server = sync_httpd_setup();
   yield setUp(server);
 
@@ -901,9 +883,9 @@ add_identity_test(this, function* test_sync_503_Retry_After() {
 
   do_check_true(Status.enforceBackoff);
   do_check_true(Status.backoffInterval >= BACKOFF * 1000);
-  // Allowing 3 seconds worth of of leeway between when Status.minimumNextSync
+  // Allowing 1 second worth of of leeway between when Status.minimumNextSync
   // was set and when this line gets executed.
-  let minimumExpectedDelay = (BACKOFF - 3) * 1000;
+  let minimumExpectedDelay = (BACKOFF - 1) * 1000;
   do_check_true(Status.minimumNextSync >= Date.now() + minimumExpectedDelay);
 
   // Verify that the next sync is actually going to wait that long.
@@ -913,7 +895,7 @@ add_identity_test(this, function* test_sync_503_Retry_After() {
   yield cleanUpAndGo(server);
 });
 
-add_identity_test(this, function* test_loginError_recoverable_reschedules() {
+add_identity_test(this, function test_loginError_recoverable_reschedules() {
   _("Verify that a recoverable login error schedules a new sync.");
   yield configureIdentity({username: "johndoe"});
   Service.serverURL = "http://localhost:1234/";
@@ -957,7 +939,7 @@ add_identity_test(this, function* test_loginError_recoverable_reschedules() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_loginError_fatal_clearsTriggers() {
+add_identity_test(this, function test_loginError_fatal_clearsTriggers() {
   _("Verify that a fatal login error clears sync triggers.");
   yield configureIdentity({username: "johndoe"});
 
@@ -974,22 +956,11 @@ add_identity_test(this, function* test_loginError_fatal_clearsTriggers() {
   Svc.Obs.add("weave:service:login:error", function onLoginError() {
     Svc.Obs.remove("weave:service:login:error", onLoginError);
     Utils.nextTick(function aLittleBitAfterLoginError() {
+      do_check_eq(Status.login, LOGIN_FAILED_LOGIN_REJECTED);
+
+      do_check_eq(scheduler.nextSync, 0);
+      do_check_eq(scheduler.syncTimer, null);
 
-      if (isConfiguredWithLegacyIdentity()) {
-        // for the "legacy" identity, a 401 on info/collections means the
-        // password is wrong, so we enter a "login rejected" state.
-        do_check_eq(Status.login, LOGIN_FAILED_LOGIN_REJECTED);
-
-        do_check_eq(scheduler.nextSync, 0);
-        do_check_eq(scheduler.syncTimer, null);
-      } else {
-        // For the FxA identity, a 401 on info/collections means a transient
-        // error, probably due to an inability to fetch a token.
-        do_check_eq(Status.login, LOGIN_FAILED_NETWORK_ERROR);
-        // syncs should still be scheduled.
-        do_check_true(scheduler.nextSync > Date.now());
-        do_check_true(scheduler.syncTimer.delay > 0);
-      }
       cleanUpAndGo(server).then(deferred.resolve);
     });
   });
@@ -1004,7 +975,7 @@ add_identity_test(this, function* test_loginError_fatal_clearsTriggers() {
   yield deferred.promise;
 });
 
-add_identity_test(this, function* test_proper_interval_on_only_failing() {
+add_identity_test(this, function test_proper_interval_on_only_failing() {
   _("Ensure proper behavior when only failed records are applied.");
 
   // If an engine reports that no records succeeded, we shouldn't decrease the
diff --git a/services/sync/tests/unit/test_syncstoragerequest.js b/services/sync/tests/unit/test_syncstoragerequest.js
index 14e5daade..7c5246bab 100644
--- a/services/sync/tests/unit/test_syncstoragerequest.js
+++ b/services/sync/tests/unit/test_syncstoragerequest.js
@@ -8,9 +8,6 @@ Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 
-var httpProtocolHandler = Cc["@mozilla.org/network/protocol;1?name=http"]
-                          .getService(Ci.nsIHttpProtocolHandler);
-
 function run_test() {
   Log.repository.getLogger("Sync.RESTRequest").level = Log.Level.Trace;
   initTestLogging();
@@ -25,7 +22,6 @@ add_test(function test_user_agent_desktop() {
   let server = httpd_setup({"/resource": handler});
 
   let expectedUA = Services.appinfo.name + "/" + Services.appinfo.version +
-                   " (" + httpProtocolHandler.oscpu + ")" +
                    " FxSync/" + WEAVE_VERSION + "." +
                    Services.appinfo.appBuildID + ".desktop";
 
@@ -45,7 +41,6 @@ add_test(function test_user_agent_mobile() {
 
   Svc.Prefs.set("client.type", "mobile");
   let expectedUA = Services.appinfo.name + "/" + Services.appinfo.version +
-                   " (" + httpProtocolHandler.oscpu + ")" +
                    " FxSync/" + WEAVE_VERSION + "." +
                    Services.appinfo.appBuildID + ".mobile";
 
diff --git a/services/sync/tests/unit/test_tab_engine.js b/services/sync/tests/unit/test_tab_engine.js
index 049250230..db4b20a70 100644
--- a/services/sync/tests/unit/test_tab_engine.js
+++ b/services/sync/tests/unit/test_tab_engine.js
@@ -1,7 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
-Cu.import("resource://services-sync/constants.js");
 Cu.import("resource://services-sync/engines/tabs.js");
 Cu.import("resource://services-sync/record.js");
 Cu.import("resource://services-sync/service.js");
@@ -24,12 +23,11 @@ add_test(function test_getOpenURLs() {
   _("Test getOpenURLs.");
   let [engine, store] = getMocks();
 
-  let superLongURL = "http://" + (new Array(MAX_UPLOAD_BYTES).join("w")) + ".com/";
-  let urls = ["http://bar.com", "http://foo.com", "http://foobar.com", superLongURL];
-  function fourURLs() {
+  let urls = ["http://bar.com", "http://foo.com", "http://foobar.com"];
+  function threeURLs() {
     return urls.pop();
   }
-  store.getWindowEnumerator = mockGetWindowEnumerator.bind(this, fourURLs, 1, 4);
+  store.getWindowEnumerator = mockGetWindowEnumerator.bind(this, threeURLs, 1, 3);
 
   let matches;
 
@@ -42,10 +40,6 @@ add_test(function test_getOpenURLs() {
   matches = openurlsset.has("http://barfoo.com");
   ok(!matches);
 
-  _("  test matching works (too long)");
-  matches = openurlsset.has(superLongURL);
-  ok(!matches);
-
   run_next_test();
 });
 
diff --git a/services/sync/tests/unit/test_tab_store.js b/services/sync/tests/unit/test_tab_store.js
index 93b60f0c7..f8265492f 100644
--- a/services/sync/tests/unit/test_tab_store.js
+++ b/services/sync/tests/unit/test_tab_store.js
@@ -20,26 +20,32 @@ function test_create() {
   _("Create a first record");
   let rec = {id: "id1",
              clientName: "clientName1",
-             cleartext: { "foo": "bar" },
+             cleartext: "cleartext1",
              modified: 1000};
   store.applyIncoming(rec);
-  deepEqual(store._remoteClients["id1"], { lastModified: 1000, foo: "bar" });
+  do_check_eq(store._remoteClients["id1"], "cleartext1");
+  do_check_eq(Svc.Prefs.get("notifyTabState"), 1);
 
   _("Create a second record");
   rec = {id: "id2",
          clientName: "clientName2",
-         cleartext: { "foo2": "bar2" },
+         cleartext: "cleartext2",
          modified: 2000};
   store.applyIncoming(rec);
-  deepEqual(store._remoteClients["id2"], { lastModified: 2000, foo2: "bar2" });
+  do_check_eq(store._remoteClients["id2"], "cleartext2");
+  do_check_eq(Svc.Prefs.get("notifyTabState"), 0);
 
   _("Create a third record");
   rec = {id: "id3",
          clientName: "clientName3",
-         cleartext: { "foo3": "bar3" },
+         cleartext: "cleartext3",
          modified: 3000};
   store.applyIncoming(rec);
-  deepEqual(store._remoteClients["id3"], { lastModified: 3000, foo3: "bar3" });
+  do_check_eq(store._remoteClients["id3"], "cleartext3");
+  do_check_eq(Svc.Prefs.get("notifyTabState"), 0);
+
+  // reset the notifyTabState
+  Svc.Prefs.reset("notifyTabState");
 }
 
 function test_getAllTabs() {
@@ -53,20 +59,20 @@ function test_getAllTabs() {
   _("Get all tabs.");
   tabs = store.getAllTabs();
   _("Tabs: " + JSON.stringify(tabs));
-  equal(tabs.length, 1);
-  equal(tabs[0].title, "title");
-  equal(tabs[0].urlHistory.length, 2);
-  equal(tabs[0].urlHistory[0], "http://foo.com");
-  equal(tabs[0].urlHistory[1], "http://bar.com");
-  equal(tabs[0].icon, "image");
-  equal(tabs[0].lastUsed, 1);
+  do_check_eq(tabs.length, 1);
+  do_check_eq(tabs[0].title, "title");
+  do_check_eq(tabs[0].urlHistory.length, 2);
+  do_check_eq(tabs[0].urlHistory[0], "http://foo.com");
+  do_check_eq(tabs[0].urlHistory[1], "http://bar.com");
+  do_check_eq(tabs[0].icon, "image");
+  do_check_eq(tabs[0].lastUsed, 1);
 
   _("Get all tabs, and check that filtering works.");
   let twoUrls = ["about:foo", "http://fuubar.com"];
   store.getWindowEnumerator = mockGetWindowEnumerator.bind(this, "http://foo.com", 1, 1, () => 2, () => twoUrls);
   tabs = store.getAllTabs(true);
   _("Filtered: " + JSON.stringify(tabs));
-  equal(tabs.length, 0);
+  do_check_eq(tabs.length, 0);
 
   _("Get all tabs, and check that the entries safety limit works.");
   let allURLs = [];
@@ -79,10 +85,10 @@ function test_getAllTabs() {
   tabs = store.getAllTabs((url) => url.startsWith("about"));
 
   _("Sliced: " + JSON.stringify(tabs));
-  equal(tabs.length, 1);
-  equal(tabs[0].urlHistory.length, 25);
-  equal(tabs[0].urlHistory[0], "http://foo40.bar");
-  equal(tabs[0].urlHistory[24], "http://foo16.bar");
+  do_check_eq(tabs.length, 1);
+  do_check_eq(tabs[0].urlHistory.length, 25);
+  do_check_eq(tabs[0].urlHistory[0], "http://foo40.bar");
+  do_check_eq(tabs[0].urlHistory[24], "http://foo16.bar");
 }
 
 function test_createRecord() {
@@ -99,14 +105,14 @@ function test_createRecord() {
 
   store.getWindowEnumerator = mockGetWindowEnumerator.bind(this, "http://foo.com", 1, 1);
   record = store.createRecord("fake-guid");
-  ok(record instanceof TabSetRecord);
-  equal(record.tabs.length, 1);
+  do_check_true(record instanceof TabSetRecord);
+  do_check_eq(record.tabs.length, 1);
 
   _("create a big record");
   store.getWindowEnumerator = mockGetWindowEnumerator.bind(this, "http://foo.com", 1, numtabs);
   record = store.createRecord("fake-guid");
-  ok(record instanceof TabSetRecord);
-  equal(record.tabs.length, 256);
+  do_check_true(record instanceof TabSetRecord);
+  do_check_eq(record.tabs.length, 256);
 }
 
 function run_test() {
diff --git a/services/sync/tests/unit/test_tab_tracker.js b/services/sync/tests/unit/test_tab_tracker.js
index f98920a44..e7dd48829 100644
--- a/services/sync/tests/unit/test_tab_tracker.js
+++ b/services/sync/tests/unit/test_tab_tracker.js
@@ -5,7 +5,7 @@ Cu.import("resource://services-sync/engines/tabs.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 
-var clientsEngine = Service.clientsEngine;
+let clientsEngine = Service.clientsEngine;
 
 function fakeSvcWinMediator() {
   // actions on windows are captured in logs
@@ -15,11 +15,9 @@ function fakeSvcWinMediator() {
     getEnumerator: function() {
       return {
         cnt: 2,
-        hasMoreElements: function() {
-          return this.cnt-- > 0;
-        },
+        hasMoreElements: function() this.cnt-- > 0,
         getNext: function() {
-          let elt = {addTopics: [], remTopics: [], numAPL: 0, numRPL: 0};
+          let elt = {addTopics: [], remTopics: []};
           logs.push(elt);
           return {
             addEventListener: function(topic) {
@@ -27,15 +25,7 @@ function fakeSvcWinMediator() {
             },
             removeEventListener: function(topic) {
               elt.remTopics.push(topic);
-            },
-            gBrowser: {
-              addProgressListener() {
-                elt.numAPL++;
-              },
-              removeProgressListener() {
-                elt.numRPL++;
-              },
-            },
+            }
           };
         }
       };
@@ -61,7 +51,7 @@ function run_test() {
   logs = fakeSvcWinMediator();
   Svc.Obs.notify("weave:engine:start-tracking");
   do_check_eq(logs.length, 2);
-  for (let log of logs) {
+  for each (let log in logs) {
     do_check_eq(log.addTopics.length, 5);
     do_check_true(log.addTopics.indexOf("pageshow") >= 0);
     do_check_true(log.addTopics.indexOf("TabOpen") >= 0);
@@ -69,15 +59,13 @@ function run_test() {
     do_check_true(log.addTopics.indexOf("TabSelect") >= 0);
     do_check_true(log.addTopics.indexOf("unload") >= 0);
     do_check_eq(log.remTopics.length, 0);
-    do_check_eq(log.numAPL, 1, "Added 1 progress listener");
-    do_check_eq(log.numRPL, 0, "Didn't remove a progress listener");
   }
 
   _("Test listeners are unregistered on windows");
   logs = fakeSvcWinMediator();
   Svc.Obs.notify("weave:engine:stop-tracking");
   do_check_eq(logs.length, 2);
-  for (let log of logs) {
+  for each (let log in logs) {
     do_check_eq(log.addTopics.length, 0);
     do_check_eq(log.remTopics.length, 5);
     do_check_true(log.remTopics.indexOf("pageshow") >= 0);
@@ -85,12 +73,10 @@ function run_test() {
     do_check_true(log.remTopics.indexOf("TabClose") >= 0);
     do_check_true(log.remTopics.indexOf("TabSelect") >= 0);
     do_check_true(log.remTopics.indexOf("unload") >= 0);
-    do_check_eq(log.numAPL, 0, "Didn't add a progress listener");
-    do_check_eq(log.numRPL, 1, "Removed 1 progress listener");
   }
 
   _("Test tab listener");
-  for (let evttype of ["TabOpen", "TabClose", "TabSelect"]) {
+  for each (let evttype in ["TabOpen", "TabClose", "TabSelect"]) {
     // Pretend we just synced.
     tracker.clearChangedIDs();
     do_check_false(tracker.modified);
@@ -109,19 +95,4 @@ function run_test() {
   tracker.onTab({type: "pageshow", originalTarget: "pageshow"});
   do_check_true(Utils.deepEquals(Object.keys(engine.getChangedIDs()),
                                  [clientsEngine.localID]));
-
-  // Pretend we just synced and saw some progress listeners.
-  tracker.clearChangedIDs();
-  do_check_false(tracker.modified);
-  tracker.onLocationChange({ isTopLevel: false }, undefined, undefined, 0);
-  do_check_false(tracker.modified, "non-toplevel request didn't flag as modified");
-
-  tracker.onLocationChange({ isTopLevel: true }, undefined, undefined,
-                           Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT);
-  do_check_false(tracker.modified, "location change within the same document request didn't flag as modified");
-
-  tracker.onLocationChange({ isTopLevel: true }, undefined, undefined, 0);
-  do_check_true(tracker.modified, "location change for a new top-level document flagged as modified");
-  do_check_true(Utils.deepEquals(Object.keys(engine.getChangedIDs()),
-                                 [clientsEngine.localID]));
 }
diff --git a/services/sync/tests/unit/test_telemetry.js b/services/sync/tests/unit/test_telemetry.js
deleted file mode 100644
index 50a3d136b..000000000
--- a/services/sync/tests/unit/test_telemetry.js
+++ /dev/null
@@ -1,564 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-Cu.import("resource://services-common/observers.js");
-Cu.import("resource://services-sync/telemetry.js");
-Cu.import("resource://services-sync/service.js");
-Cu.import("resource://services-sync/record.js");
-Cu.import("resource://services-sync/resource.js");
-Cu.import("resource://services-sync/constants.js");
-Cu.import("resource://services-sync/engines.js");
-Cu.import("resource://services-sync/engines/bookmarks.js");
-Cu.import("resource://services-sync/engines/clients.js");
-Cu.import("resource://testing-common/services/sync/utils.js");
-Cu.import("resource://testing-common/services/sync/fxa_utils.js");
-Cu.import("resource://testing-common/services/sync/rotaryengine.js");
-Cu.import("resource://gre/modules/osfile.jsm", this);
-
-Cu.import("resource://gre/modules/PlacesUtils.jsm");
-Cu.import("resource://services-sync/util.js");
-
-initTestLogging("Trace");
-
-function SteamStore(engine) {
-  Store.call(this, "Steam", engine);
-}
-
-SteamStore.prototype = {
-  __proto__: Store.prototype,
-};
-
-function SteamTracker(name, engine) {
-  Tracker.call(this, name || "Steam", engine);
-}
-
-SteamTracker.prototype = {
-  __proto__: Tracker.prototype
-};
-
-function SteamEngine(service) {
-  Engine.call(this, "steam", service);
-}
-
-SteamEngine.prototype = {
-  __proto__: Engine.prototype,
-  _storeObj: SteamStore,
-  _trackerObj: SteamTracker,
-  _errToThrow: null,
-  _sync() {
-    if (this._errToThrow) {
-      throw this._errToThrow;
-    }
-  }
-};
-
-function BogusEngine(service) {
-  Engine.call(this, "bogus", service);
-}
-
-BogusEngine.prototype = Object.create(SteamEngine.prototype);
-
-function cleanAndGo(server) {
-  Svc.Prefs.resetBranch("");
-  Svc.Prefs.set("log.logger.engine.rotary", "Trace");
-  Service.recordManager.clearCache();
-  return new Promise(resolve => server.stop(resolve));
-}
-
-// Avoid addon manager complaining about not being initialized
-Service.engineManager.unregister("addons");
-
-add_identity_test(this, function *test_basic() {
-  let helper = track_collections_helper();
-  let upd = helper.with_updated_collection;
-
-  yield configureIdentity({ username: "johndoe" });
-  let handlers = {
-    "/1.1/johndoe/info/collections": helper.handler,
-    "/1.1/johndoe/storage/crypto/keys": upd("crypto", new ServerWBO("keys").handler()),
-    "/1.1/johndoe/storage/meta/global": upd("meta",  new ServerWBO("global").handler())
-  };
-
-  let collections = ["clients", "bookmarks", "forms", "history", "passwords", "prefs", "tabs"];
-
-  for (let coll of collections) {
-    handlers["/1.1/johndoe/storage/" + coll] = upd(coll, new ServerCollection({}, true).handler());
-  }
-
-  let server = httpd_setup(handlers);
-  Service.serverURL = server.baseURI;
-
-  yield sync_and_validate_telem(true);
-
-  yield new Promise(resolve => server.stop(resolve));
-});
-
-add_task(function* test_processIncoming_error() {
-  let engine = new BookmarksEngine(Service);
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {bookmarks: {version: engine.version,
-                                           syncID: engine.syncID}}}},
-    bookmarks: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-  let collection = server.user("foo").collection("bookmarks");
-  try {
-    // Create a bogus record that when synced down will provoke a
-    // network error which in turn provokes an exception in _processIncoming.
-    const BOGUS_GUID = "zzzzzzzzzzzz";
-    let bogus_record = collection.insert(BOGUS_GUID, "I'm a bogus record!");
-    bogus_record.get = function get() {
-      throw "Sync this!";
-    };
-    // Make the 10 minutes old so it will only be synced in the toFetch phase.
-    bogus_record.modified = Date.now() / 1000 - 60 * 10;
-    engine.lastSync = Date.now() / 1000 - 60;
-    engine.toFetch = [BOGUS_GUID];
-
-    let error, ping;
-    try {
-      yield sync_engine_and_validate_telem(engine, true, errPing => ping = errPing);
-    } catch(ex) {
-      error = ex;
-    }
-    ok(!!error);
-    ok(!!ping);
-    equal(ping.uid, "0".repeat(32));
-    deepEqual(ping.failureReason, {
-      name: "othererror",
-      error: "error.engine.reason.record_download_fail"
-    });
-
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].name, "bookmarks");
-    deepEqual(ping.engines[0].failureReason, {
-      name: "othererror",
-      error: "error.engine.reason.record_download_fail"
-    });
-
-  } finally {
-    store.wipe();
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function *test_uploading() {
-  let engine = new BookmarksEngine(Service);
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {bookmarks: {version: engine.version,
-                                           syncID: engine.syncID}}}},
-    bookmarks: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-
-  let parent = PlacesUtils.toolbarFolderId;
-  let uri = Utils.makeURI("http://getfirefox.com/");
-  let title = "Get Firefox";
-
-  let bmk_id = PlacesUtils.bookmarks.insertBookmark(parent, uri,
-    PlacesUtils.bookmarks.DEFAULT_INDEX, "Get Firefox!");
-
-  let guid = store.GUIDForId(bmk_id);
-  let record = store.createRecord(guid);
-
-  let collection = server.user("foo").collection("bookmarks");
-  try {
-    let ping = yield sync_engine_and_validate_telem(engine, false);
-    ok(!!ping);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].name, "bookmarks");
-    ok(!!ping.engines[0].outgoing);
-    greater(ping.engines[0].outgoing[0].sent, 0)
-    ok(!ping.engines[0].incoming);
-
-    PlacesUtils.bookmarks.setItemTitle(bmk_id, "New Title");
-
-    store.wipe();
-    engine.resetClient();
-
-    ping = yield sync_engine_and_validate_telem(engine, false);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].name, "bookmarks");
-    equal(ping.engines[0].outgoing.length, 1);
-    ok(!!ping.engines[0].incoming);
-
-  } finally {
-    // Clean up.
-    store.wipe();
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function *test_upload_failed() {
-  Service.identity.username = "foo";
-  let collection = new ServerCollection();
-  collection._wbos.flying = new ServerWBO('flying');
-
-  let server = sync_httpd_setup({
-      "/1.1/foo/storage/rotary": collection.handler()
-  });
-
-  let syncTesting = new SyncTestingInfrastructure(server);
-
-  let engine = new RotaryEngine(Service);
-  engine.lastSync = 123; // needs to be non-zero so that tracker is queried
-  engine.lastSyncLocal = 456;
-  engine._store.items = {
-    flying: "LNER Class A3 4472",
-    scotsman: "Flying Scotsman",
-    peppercorn: "Peppercorn Class"
-  };
-  const FLYING_CHANGED = 12345;
-  const SCOTSMAN_CHANGED = 23456;
-  const PEPPERCORN_CHANGED = 34567;
-  engine._tracker.addChangedID("flying", FLYING_CHANGED);
-  engine._tracker.addChangedID("scotsman", SCOTSMAN_CHANGED);
-  engine._tracker.addChangedID("peppercorn", PEPPERCORN_CHANGED);
-
-  let meta_global = Service.recordManager.set(engine.metaURL, new WBORecord(engine.metaURL));
-  meta_global.payload.engines = { rotary: { version: engine.version, syncID: engine.syncID } };
-
-  try {
-    engine.enabled = true;
-    let ping = yield sync_engine_and_validate_telem(engine, true);
-    ok(!!ping);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].incoming, null);
-    deepEqual(ping.engines[0].outgoing, [{ sent: 3, failed: 2 }]);
-    engine.lastSync = 123;
-    engine.lastSyncLocal = 456;
-
-    ping = yield sync_engine_and_validate_telem(engine, true);
-    ok(!!ping);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].incoming.reconciled, 1);
-    deepEqual(ping.engines[0].outgoing, [{ sent: 2, failed: 2 }]);
-
-  } finally {
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function *test_sync_partialUpload() {
-  Service.identity.username = "foo";
-
-  let collection = new ServerCollection();
-  let server = sync_httpd_setup({
-      "/1.1/foo/storage/rotary": collection.handler()
-  });
-  let syncTesting = new SyncTestingInfrastructure(server);
-  generateNewKeys(Service.collectionKeys);
-
-  let engine = new RotaryEngine(Service);
-  engine.lastSync = 123;
-  engine.lastSyncLocal = 456;
-
-
-  // Create a bunch of records (and server side handlers)
-  for (let i = 0; i < 234; i++) {
-    let id = 'record-no-' + i;
-    engine._store.items[id] = "Record No. " + i;
-    engine._tracker.addChangedID(id, i);
-    // Let two items in the first upload batch fail.
-    if (i != 23 && i != 42) {
-      collection.insert(id);
-    }
-  }
-
-  let meta_global = Service.recordManager.set(engine.metaURL,
-                                              new WBORecord(engine.metaURL));
-  meta_global.payload.engines = {rotary: {version: engine.version,
-                                          syncID: engine.syncID}};
-
-  try {
-    engine.enabled = true;
-    let ping = yield sync_engine_and_validate_telem(engine, true);
-
-    ok(!!ping);
-    ok(!ping.failureReason);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].name, "rotary");
-    ok(!ping.engines[0].incoming);
-    ok(!ping.engines[0].failureReason);
-    deepEqual(ping.engines[0].outgoing, [{ sent: 234, failed: 2 }]);
-
-    collection.post = function() { throw "Failure"; }
-
-    engine._store.items["record-no-1000"] = "Record No. 1000";
-    engine._tracker.addChangedID("record-no-1000", 1000);
-    collection.insert("record-no-1000", 1000);
-
-    engine.lastSync = 123;
-    engine.lastSyncLocal = 456;
-    ping = null;
-
-    try {
-      // should throw
-      yield sync_engine_and_validate_telem(engine, true, errPing => ping = errPing);
-    } catch (e) {}
-    // It would be nice if we had a more descriptive error for this...
-    let uploadFailureError = {
-      name: "othererror",
-      error: "error.engine.reason.record_upload_fail"
-    };
-
-    ok(!!ping);
-    deepEqual(ping.failureReason, uploadFailureError);
-    equal(ping.engines.length, 1);
-    equal(ping.engines[0].name, "rotary");
-    deepEqual(ping.engines[0].incoming, {
-      failed: 1,
-      newFailed: 1,
-      reconciled: 232
-    });
-    ok(!ping.engines[0].outgoing);
-    deepEqual(ping.engines[0].failureReason, uploadFailureError);
-
-  } finally {
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_generic_engine_fail() {
-  Service.engineManager.register(SteamEngine);
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {steam: {version: engine.version,
-                                      syncID: engine.syncID}}}},
-    steam: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-  let e = new Error("generic failure message")
-  engine._errToThrow = e;
-
-  try {
-    let ping = yield sync_and_validate_telem(true);
-    equal(ping.status.service, SYNC_FAILED_PARTIAL);
-    deepEqual(ping.engines.find(e => e.name === "steam").failureReason, {
-      name: "unexpectederror",
-      error: String(e)
-    });
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_engine_fail_ioerror() {
-  Service.engineManager.register(SteamEngine);
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {steam: {version: engine.version,
-                                      syncID: engine.syncID}}}},
-    steam: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-  // create an IOError to re-throw as part of Sync.
-  try {
-    // (Note that fakeservices.js has replaced Utils.jsonMove etc, but for
-    // this test we need the real one so we get real exceptions from the
-    // filesystem.)
-    yield Utils._real_jsonMove("file-does-not-exist", "anything", {});
-  } catch (ex) {
-    engine._errToThrow = ex;
-  }
-  ok(engine._errToThrow, "expecting exception");
-
-  try {
-    let ping = yield sync_and_validate_telem(true);
-    equal(ping.status.service, SYNC_FAILED_PARTIAL);
-    let failureReason = ping.engines.find(e => e.name === "steam").failureReason;
-    equal(failureReason.name, "unexpectederror");
-    // ensure the profile dir in the exception message has been stripped.
-    ok(!failureReason.error.includes(OS.Constants.Path.profileDir), failureReason.error);
-    ok(failureReason.error.includes("[profileDir]"), failureReason.error);
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_initial_sync_engines() {
-  Service.engineManager.register(SteamEngine);
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  let store  = engine._store;
-  let engines = {};
-  // These are the only ones who actually have things to sync at startup.
-  let engineNames = ["clients", "bookmarks", "prefs", "tabs"];
-  let conf = { meta: { global: { engines } } };
-  for (let e of engineNames) {
-    engines[e] = { version: engine.version, syncID: engine.syncID };
-    conf[e] = {};
-  }
-  let server = serverForUsers({"foo": "password"}, conf);
-  new SyncTestingInfrastructure(server.server);
-  try {
-    let ping = yield wait_for_ping(() => Service.sync(), true);
-
-    equal(ping.engines.find(e => e.name === "clients").outgoing[0].sent, 1);
-    equal(ping.engines.find(e => e.name === "tabs").outgoing[0].sent, 1);
-
-    // for the rest we don't care about specifics
-    for (let e of ping.engines) {
-      if (!engineNames.includes(engine.name)) {
-        continue;
-      }
-      greaterOrEqual(e.took, 1);
-      ok(!!e.outgoing)
-      equal(e.outgoing.length, 1);
-      notEqual(e.outgoing[0].sent, undefined);
-      equal(e.outgoing[0].failed, undefined);
-    }
-  } finally {
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_nserror() {
-  Service.engineManager.register(SteamEngine);
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {steam: {version: engine.version,
-                                      syncID: engine.syncID}}}},
-    steam: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-  engine._errToThrow = Components.Exception("NS_ERROR_UNKNOWN_HOST", Cr.NS_ERROR_UNKNOWN_HOST);
-  try {
-    let ping = yield sync_and_validate_telem(true);
-    deepEqual(ping.status, {
-      service: SYNC_FAILED_PARTIAL,
-      sync: LOGIN_FAILED_NETWORK_ERROR
-    });
-    let enginePing = ping.engines.find(e => e.name === "steam");
-    deepEqual(enginePing.failureReason, {
-      name: "nserror",
-      code: Cr.NS_ERROR_UNKNOWN_HOST
-    });
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
-
-add_identity_test(this, function *test_discarding() {
-  let helper = track_collections_helper();
-  let upd = helper.with_updated_collection;
-  let telem = get_sync_test_telemetry();
-  telem.maxPayloadCount = 2;
-  telem.submissionInterval = Infinity;
-  let oldSubmit = telem.submit;
-
-  let server;
-  try {
-
-    yield configureIdentity({ username: "johndoe" });
-    let handlers = {
-      "/1.1/johndoe/info/collections": helper.handler,
-      "/1.1/johndoe/storage/crypto/keys": upd("crypto", new ServerWBO("keys").handler()),
-      "/1.1/johndoe/storage/meta/global": upd("meta",  new ServerWBO("global").handler())
-    };
-
-    let collections = ["clients", "bookmarks", "forms", "history", "passwords", "prefs", "tabs"];
-
-    for (let coll of collections) {
-      handlers["/1.1/johndoe/storage/" + coll] = upd(coll, new ServerCollection({}, true).handler());
-    }
-
-    server = httpd_setup(handlers);
-    Service.serverURL = server.baseURI;
-    telem.submit = () => ok(false, "Submitted telemetry ping when we should not have");
-
-    for (let i = 0; i < 5; ++i) {
-      Service.sync();
-    }
-    telem.submit = oldSubmit;
-    telem.submissionInterval = -1;
-    let ping = yield sync_and_validate_telem(true, true); // with this we've synced 6 times
-    equal(ping.syncs.length, 2);
-    equal(ping.discarded, 4);
-  } finally {
-    telem.maxPayloadCount = 500;
-    telem.submissionInterval = -1;
-    telem.submit = oldSubmit;
-    if (server) {
-      yield new Promise(resolve => server.stop(resolve));
-    }
-  }
-})
-
-add_task(function* test_no_foreign_engines_in_error_ping() {
-  Service.engineManager.register(BogusEngine);
-  let engine = Service.engineManager.get("bogus");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {bogus: {version: engine.version, syncID: engine.syncID}}}},
-    steam: {}
-  });
-  engine._errToThrow = new Error("Oh no!");
-  new SyncTestingInfrastructure(server.server);
-  try {
-    let ping = yield sync_and_validate_telem(true);
-    equal(ping.status.service, SYNC_FAILED_PARTIAL);
-    ok(ping.engines.every(e => e.name !== "bogus"));
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_sql_error() {
-  Service.engineManager.register(SteamEngine);
-  let engine = Service.engineManager.get("steam");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {steam: {version: engine.version,
-                                      syncID: engine.syncID}}}},
-    steam: {}
-  });
-  new SyncTestingInfrastructure(server.server);
-  engine._sync = function() {
-    // Just grab a DB connection and issue a bogus SQL statement synchronously.
-    let db = PlacesUtils.history.QueryInterface(Ci.nsPIPlacesDatabase).DBConnection;
-    Async.querySpinningly(db.createAsyncStatement("select bar from foo"));
-  };
-  try {
-    let ping = yield sync_and_validate_telem(true);
-    let enginePing = ping.engines.find(e => e.name === "steam");
-    deepEqual(enginePing.failureReason, { name: "sqlerror", code: 1 });
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
-
-add_task(function* test_no_foreign_engines_in_success_ping() {
-  Service.engineManager.register(BogusEngine);
-  let engine = Service.engineManager.get("bogus");
-  engine.enabled = true;
-  let store  = engine._store;
-  let server = serverForUsers({"foo": "password"}, {
-    meta: {global: {engines: {bogus: {version: engine.version, syncID: engine.syncID}}}},
-    steam: {}
-  });
-
-  new SyncTestingInfrastructure(server.server);
-  try {
-    let ping = yield sync_and_validate_telem();
-    ok(ping.engines.every(e => e.name !== "bogus"));
-  } finally {
-    Service.engineManager.unregister(engine);
-    yield cleanAndGo(server);
-  }
-});
\ No newline at end of file
diff --git a/services/sync/tests/unit/test_utils_catch.js b/services/sync/tests/unit/test_utils_catch.js
index 5f50bf7e4..a10e5eb0d 100644
--- a/services/sync/tests/unit/test_utils_catch.js
+++ b/services/sync/tests/unit/test_utils_catch.js
@@ -8,46 +8,38 @@ function run_test() {
     catch: Utils.catch,
     _log: {
       debug: function(str) {
-        didThrow = str.search(/^Exception/) == 0;
+        didThrow = str.search(/^Exception: /) == 0;
       },
       info: function(str) {
         wasLocked = str.indexOf("Cannot start sync: already syncing?") == 0;
       }
     },
 
-    func: function() {
-      return this.catch(function() {
-        rightThis = this == obj;
-        didCall = true;
-        return 5;
-      })();
-    },
+    func: function() this.catch(function() {
+      rightThis = this == obj;
+      didCall = true;
+      return 5;
+    })(),
 
-    throwy: function() {
-      return this.catch(function() {
-        rightThis = this == obj;
-        didCall = true;
-        throw 10;
-      })();
-    },
+    throwy: function() this.catch(function() {
+      rightThis = this == obj;
+      didCall = true;
+      throw 10;
+    })(),
 
-    callbacky: function() {
-      return this.catch(function() {
-        rightThis = this == obj;
-        didCall = true;
-        throw 10;
-      }, function(ex) {
-        wasTen = (ex == 10)
-      })();
-    },
+    callbacky: function() this.catch(function() {
+      rightThis = this == obj;
+      didCall = true;
+      throw 10;
+    }, function(ex) {
+      wasTen = (ex == 10)
+    })(),
 
-    lockedy: function() {
-      return this.catch(function() {
-        rightThis = this == obj;
-        didCall = true;
-        throw("Could not acquire lock.");
-      })();
-    }
+    lockedy: function() this.catch(function() {
+      rightThis = this == obj;
+      didCall = true;
+      throw("Could not acquire lock.");
+    })()
   };
 
   _("Make sure a normal call will call and return");
diff --git a/services/sync/tests/unit/test_utils_deferGetSet.js b/services/sync/tests/unit/test_utils_deferGetSet.js
index 9d58a9873..55c0fcb0e 100644
--- a/services/sync/tests/unit/test_utils_deferGetSet.js
+++ b/services/sync/tests/unit/test_utils_deferGetSet.js
@@ -6,12 +6,8 @@ function run_test() {
   base.prototype = {
     dst: {},
 
-    get a() {
-      return "a";
-    },
-    set b(val) {
-      this.dst.b = val + "!!!";
-    }
+    get a() "a",
+    set b(val) this.dst.b = val + "!!!"
   };
   let src = new base();
 
diff --git a/services/sync/tests/unit/test_utils_deriveKey.js b/services/sync/tests/unit/test_utils_deriveKey.js
index 17dd889c7..e205fa9f8 100644
--- a/services/sync/tests/unit/test_utils_deriveKey.js
+++ b/services/sync/tests/unit/test_utils_deriveKey.js
@@ -1,7 +1,7 @@
 Cu.import("resource://services-crypto/WeaveCrypto.js");
 Cu.import("resource://services-sync/util.js");
 
-var cryptoSvc = new WeaveCrypto();
+let cryptoSvc = new WeaveCrypto();
 
 function run_test() {
   if (this.gczeal) {
diff --git a/services/sync/tests/unit/test_utils_lock.js b/services/sync/tests/unit/test_utils_lock.js
index d1830787e..fd8a4b1f5 100644
--- a/services/sync/tests/unit/test_utils_lock.js
+++ b/services/sync/tests/unit/test_utils_lock.js
@@ -27,23 +27,19 @@ function run_test() {
       this._locked = false;
     },
 
-    func: function() {
-      return this._lock("Test utils lock",
-                        function() {
-                          rightThis = this == obj;
-                          didCall = true;
-                          return 5;
-                        })();
-    },
+    func: function() this._lock("Test utils lock",
+    function() {
+      rightThis = this == obj;
+      didCall = true;
+      return 5;
+    })(),
 
-    throwy: function() {
-      return this._lock("Test utils lock throwy",
-                        function() {
-                          rightThis = this == obj;
-                          didCall = true;
-                          this.throwy();
-                        })();
-    }
+    throwy: function() this._lock("Test utils lock throwy",
+    function() {
+      rightThis = this == obj;
+      didCall = true;
+      this.throwy();
+    })()
   };
 
   _("Make sure a normal call will call and return");
diff --git a/services/sync/tests/unit/test_utils_notify.js b/services/sync/tests/unit/test_utils_notify.js
index 5bd38da5f..c191bbfef 100644
--- a/services/sync/tests/unit/test_utils_notify.js
+++ b/services/sync/tests/unit/test_utils_notify.js
@@ -9,21 +9,17 @@ function run_test() {
       trace: function() {}
     },
 
-    func: function() {
-      return this.notify("bar", "baz", function() {
-        rightThis = this == obj;
-        didCall = true;
-        return 5;
-      })();
-    },
+    func: function() this.notify("bar", "baz", function() {
+      rightThis = this == obj;
+      didCall = true;
+      return 5;
+    })(),
 
-    throwy: function() {
-      return this.notify("bad", "one", function() {
-        rightThis = this == obj;
-        didCall = true;
-        throw 10;
-      })();
-    }
+    throwy: function() this.notify("bad", "one", function() {
+      rightThis = this == obj;
+      didCall = true;
+      throw 10;
+    })()
   };
 
   let state = 0;
diff --git a/services/sync/tests/unit/test_warn_on_truncated_response.js b/services/sync/tests/unit/test_warn_on_truncated_response.js
index 1f0d87ba9..a9f070ee4 100644
--- a/services/sync/tests/unit/test_warn_on_truncated_response.js
+++ b/services/sync/tests/unit/test_warn_on_truncated_response.js
@@ -12,11 +12,11 @@ function run_test() {
   run_next_test();
 }
 
-var BODY = "response body";
+let BODY = "response body";
 // contentLength needs to be longer than the response body
 // length in order to get a mismatch between what is sent in
 // the response and the content-length header value.
-var contentLength = BODY.length + 1;
+let contentLength = BODY.length + 1;
 
 function contentHandler(request, response) {
   _("Handling request.");
diff --git a/services/sync/tests/unit/xpcshell.ini b/services/sync/tests/unit/xpcshell.ini
index 4c0f0e7b7..7e97835ac 100644
--- a/services/sync/tests/unit/xpcshell.ini
+++ b/services/sync/tests/unit/xpcshell.ini
@@ -1,7 +1,8 @@
 [DEFAULT]
-head = head_appinfo.js ../../../common/tests/unit/head_helpers.js head_helpers.js head_http_server.js head_errorhandler_common.js
+head = head_appinfo.js ../../../common/tests/unit/head_helpers.js head_helpers.js head_http_server.js
 tail =
 firefox-appdir = browser
+skip-if = toolkit == 'gonk'
 support-files =
   addon1-search.xml
   bootstrap1-search.xml
@@ -10,10 +11,6 @@ support-files =
   missing-xpi-search.xml
   places_v10_from_v11.sqlite
   rewrite-search.xml
-  sync_ping_schema.json
-  systemaddon-search.xml
-  !/services/common/tests/unit/head_helpers.js
-  !/toolkit/components/webextensions/test/xpcshell/head_sync.js
 
 # The manifest is roughly ordered from low-level to high-level. When making
 # systemic sweeping changes, this makes it easier to identify errors closer to
@@ -39,7 +36,6 @@ support-files =
 # We have a number of other libraries that are pretty much standalone.
 [test_addon_utils.js]
 run-sequentially = Restarts server, can't change pref.
-tags = addons
 [test_httpd_sync_server.js]
 [test_jpakeclient.js]
 # Bug 618233: this test produces random failures on Windows 7.
@@ -56,7 +52,6 @@ skip-if = os == "win" || os == "android"
 # Generic Sync types.
 [test_browserid_identity.js]
 [test_collection_inc_get.js]
-[test_collection_getBatched.js]
 [test_collections_recovery.js]
 [test_identity_manager.js]
 [test_keys.js]
@@ -97,7 +92,6 @@ skip-if = os == "mac" || os == "linux"
 [test_service_sync_remoteSetup.js]
 # Bug 676978: test hangs on Android (see also testing/xpcshell/xpcshell.ini)
 skip-if = os == "android"
-[test_service_sync_specified.js]
 [test_service_sync_updateEnabledEngines.js]
 # Bug 676978: test hangs on Android (see also testing/xpcshell/xpcshell.ini)
 skip-if = os == "android"
@@ -109,8 +103,7 @@ skip-if = os == "mac" || os == "linux"
 
 [test_corrupt_keys.js]
 [test_declined.js]
-[test_errorhandler_1.js]
-[test_errorhandler_2.js]
+[test_errorhandler.js]
 [test_errorhandler_filelog.js]
 # Bug 676978: test hangs on Android (see also testing/xpcshell/xpcshell.ini)
 skip-if = os == "android"
@@ -121,6 +114,7 @@ skip-if = os == "android"
 [test_hmac_error.js]
 [test_interval_triggers.js]
 [test_node_reassignment.js]
+[test_notifications.js]
 [test_score_triggers.js]
 [test_sendcredentials_controller.js]
 [test_status.js]
@@ -136,18 +130,12 @@ skip-if = os == "android"
 # Finally, we test each engine.
 [test_addons_engine.js]
 run-sequentially = Hardcoded port in static files.
-tags = addons
 [test_addons_reconciler.js]
-tags = addons
 [test_addons_store.js]
 run-sequentially = Hardcoded port in static files.
-tags = addons
 [test_addons_tracker.js]
-tags = addons
 [test_bookmark_batch_fail.js]
-[test_bookmark_duping.js]
 [test_bookmark_engine.js]
-[test_bookmark_invalid.js]
 [test_bookmark_legacy_microsummaries_support.js]
 [test_bookmark_livemarks.js]
 [test_bookmark_order.js]
@@ -158,13 +146,8 @@ tags = addons
 # Too many intermittent "ASSERTION: thread pool wasn't shutdown: '!mPool'" (bug 804479)
 skip-if = debug
 [test_bookmark_tracker.js]
-requesttimeoutfactor = 4
-[test_bookmark_validator.js]
 [test_clients_engine.js]
 [test_clients_escape.js]
-[test_extension_storage_crypto.js]
-[test_extension_storage_engine.js]
-[test_extension_storage_tracker.js]
 [test_forms_store.js]
 [test_forms_tracker.js]
 # Too many intermittent "ASSERTION: thread pool wasn't shutdown: '!mPool'" (bug 804479)
@@ -176,21 +159,13 @@ skip-if = debug
 skip-if = debug
 [test_places_guid_downgrade.js]
 [test_password_store.js]
-[test_password_validator.js]
 [test_password_tracker.js]
 # Too many intermittent "ASSERTION: thread pool wasn't shutdown: '!mPool'" (bug 804479)
 skip-if = debug
 [test_prefs_store.js]
-support-files = prefs_test_prefs_store.js
 [test_prefs_tracker.js]
 [test_tab_engine.js]
 [test_tab_store.js]
 [test_tab_tracker.js]
 
 [test_warn_on_truncated_response.js]
-[test_postqueue.js]
-
-# Synced tabs.
-[test_syncedtabs.js]
-
-[test_telemetry.js]