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diff --git a/devtools/server/tests/mochitest/test_inspector-mutations-attr.html b/devtools/server/tests/mochitest/test_inspector-mutations-attr.html
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+++ b/devtools/server/tests/mochitest/test_inspector-mutations-attr.html
@@ -0,0 +1,167 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug </title>
+
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+  <script type="application/javascript;version=1.8" src="inspector-helpers.js"></script>
+  <script type="application/javascript;version=1.8">
+const inspector = require("devtools/shared/fronts/inspector");
+
+window.onload = function() {
+  SimpleTest.waitForExplicitFinish();
+  runNextTest();
+}
+
+var gInspectee = null;
+var gWalker = null;
+var gClient = null;
+var attrNode;
+var attrFront;
+
+addTest(function setup() {
+  let url = document.getElementById("inspectorContent").href;
+  attachURL(url, function(err, client, tab, doc) {
+    gInspectee = doc;
+    let {InspectorFront} = require("devtools/shared/fronts/inspector");
+    let inspector = InspectorFront(client, tab);
+    promiseDone(inspector.getWalker().then(walker => {
+      ok(walker, "getWalker() should return an actor.");
+      gClient = client;
+      gWalker = walker;
+    }).then(runNextTest));
+  });
+});
+
+addTest(setupAttrTest);
+addTest(testAddAttribute);
+addTest(testChangeAttribute);
+addTest(testRemoveAttribute);
+addTest(testQueuedMutations);
+addTest(setupFrameAttrTest);
+addTest(testAddAttribute);
+addTest(testChangeAttribute);
+addTest(testRemoveAttribute);
+addTest(testQueuedMutations);
+
+function setupAttrTest() {
+  attrNode = gInspectee.querySelector("#a")
+  promiseDone(gWalker.querySelector(gWalker.rootNode, "#a").then(node => {
+    attrFront = node;
+  }).then(runNextTest));
+}
+
+function setupFrameAttrTest() {
+  let frame = gInspectee.querySelector('#childFrame');
+  attrNode = frame.contentDocument.querySelector("#a");
+
+  promiseDone(gWalker.querySelector(gWalker.rootNode, "#childFrame").then(childFrame => {
+    return gWalker.children(childFrame);
+  }).then(children => {
+    let nodes = children.nodes;
+    ok(nodes.length, 1, "There should be only one child of the iframe");
+    is(nodes[0].nodeType, Node.DOCUMENT_NODE, "iframe child should be a document node");
+    return gWalker.querySelector(nodes[0], "#a");
+  }).then(node => {
+    attrFront = node;
+  }).then(runNextTest));
+}
+
+function testAddAttribute() {
+  attrNode.setAttribute("data-newattr", "newvalue");
+  attrNode.setAttribute("data-newattr2", "newvalue");
+  gWalker.once("mutations", () => {
+    is(attrFront.attributes.length, 3, "Should have id and two new attributes.");
+    is(attrFront.getAttribute("data-newattr"), "newvalue", "Node front should have the first new attribute");
+    is(attrFront.getAttribute("data-newattr2"), "newvalue", "Node front should have the second new attribute.");
+    runNextTest();
+  });
+}
+
+function testChangeAttribute() {
+  attrNode.setAttribute("data-newattr", "changedvalue1");
+  attrNode.setAttribute("data-newattr", "changedvalue2");
+  attrNode.setAttribute("data-newattr", "changedvalue3");
+  gWalker.once("mutations", mutations => {
+    is(mutations.length, 1, "Only one mutation is sent for multiple queued attribute changes");
+    is(attrFront.attributes.length, 3, "Should have id and two new attributes.");
+    is(attrFront.getAttribute("data-newattr"), "changedvalue3", "Node front should have the changed first value");
+    is(attrFront.getAttribute("data-newattr2"), "newvalue", "Second value should remain unchanged.");
+    runNextTest();
+  });
+}
+
+function testRemoveAttribute() {
+  attrNode.removeAttribute("data-newattr2");
+  gWalker.once("mutations", () => {
+    is(attrFront.attributes.length, 2, "Should have id and one remaining attribute.");
+    is(attrFront.getAttribute("data-newattr"), "changedvalue3", "Node front should still have the first value");
+    ok(!attrFront.hasAttribute("data-newattr2"), "Second value should be removed.");
+    runNextTest();
+  })
+}
+
+function testQueuedMutations() {
+  // All modifications to each attribute should be queued in one mutation event.
+
+  attrNode.removeAttribute("data-newattr");
+  attrNode.setAttribute("data-newattr", "1");
+  attrNode.removeAttribute("data-newattr");
+  attrNode.setAttribute("data-newattr", "2");
+  attrNode.removeAttribute("data-newattr");
+
+  for (var i = 0; i <= 1000; i++) {
+    attrNode.setAttribute("data-newattr2", i);
+  }
+
+  attrNode.removeAttribute("data-newattr3");
+  attrNode.setAttribute("data-newattr3", "1");
+  attrNode.removeAttribute("data-newattr3");
+  attrNode.setAttribute("data-newattr3", "2");
+  attrNode.removeAttribute("data-newattr3");
+  attrNode.setAttribute("data-newattr3", "3");
+
+  // This shouldn't be added in the attribute set, since it's a new
+  // attribute that's been added and removed.
+  attrNode.setAttribute("data-newattr4", "4");
+  attrNode.removeAttribute("data-newattr4");
+
+  gWalker.once("mutations", mutations => {
+    is(mutations.length, 4, "Only one mutation each is sent for multiple queued attribute changes");
+    is(attrFront.attributes.length, 3, "Should have id, data-newattr2, and data-newattr3.");
+
+    is(attrFront.getAttribute("data-newattr2"), "1000", "Node front should still have the correct value");
+    is(attrFront.getAttribute("data-newattr3"), "3", "Node front should still have the correct value");
+    ok(!attrFront.hasAttribute("data-newattr"), "Attribute value should be removed.");
+    ok(!attrFront.hasAttribute("data-newattr4"), "Attribute value should be removed.");
+
+    runNextTest();
+  })
+}
+
+addTest(function cleanup() {
+  delete gInspectee;
+  delete gWalker;
+  delete gClient;
+  runNextTest();
+});
+
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
+<a id="inspectorContent" target="_blank" href="inspector-traversal-data.html">Test Document</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>