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diff --git a/devtools/server/tests/mochitest/test_inspector-duplicate-node.html b/devtools/server/tests/mochitest/test_inspector-duplicate-node.html
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+++ b/devtools/server/tests/mochitest/test_inspector-duplicate-node.html
@@ -0,0 +1,75 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1208864
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1208864</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 gClient = null;
+var gWalker = null;
+
+function assertOwnership() {
+  assertOwnershipTrees(gWalker);
+}
+
+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(Task.async(function* testDuplicateNode() {
+  let className = ".node-to-duplicate";
+  let matches = yield gWalker.querySelectorAll(gWalker.rootNode, className);
+  is(matches.length, 1, "There should initially be one node to duplicate.");
+
+  let nodeFront = yield gWalker.querySelector(gWalker.rootNode, className);
+  yield gWalker.duplicateNode(nodeFront);
+
+  matches = yield gWalker.querySelectorAll(gWalker.rootNode, className);
+  is(matches.length, 2, "The node should now be duplicated.");
+
+  runNextTest();
+}));
+
+addTest(function cleanup() {
+  delete gWalker;
+  delete gInspectee;
+  delete gClient;
+  runNextTest();
+});
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1208864">Mozilla Bug 1208864</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>