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diff --git a/devtools/server/tests/chrome/test_inspector-duplicate-node.html b/devtools/server/tests/chrome/test_inspector-duplicate-node.html
new file mode 100644
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+++ b/devtools/server/tests/chrome/test_inspector-duplicate-node.html
@@ -0,0 +1,61 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1208864
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1208864</title>
+
+  <script 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" src="inspector-helpers.js"></script>
+  <script type="application/javascript">
+"use strict";
+
+window.onload = function() {
+  SimpleTest.waitForExplicitFinish();
+  runNextTest();
+};
+
+let gWalker = null;
+
+addTest(async function setup() {
+  const url = document.getElementById("inspectorContent").href;
+  const { target } = await attachURL(url);
+  const inspector = await target.getFront("inspector");
+  gWalker = inspector.walker;
+  runNextTest();
+});
+
+addTest(async function testDuplicateNode() {
+  const className = ".node-to-duplicate";
+  let matches = await gWalker.querySelectorAll(gWalker.rootNode, className);
+  is(matches.length, 1, "There should initially be one node to duplicate.");
+
+  const nodeFront = await gWalker.querySelector(gWalker.rootNode, className);
+  await gWalker.duplicateNode(nodeFront);
+
+  matches = await gWalker.querySelectorAll(gWalker.rootNode, className);
+  is(matches.length, 2, "The node should now be duplicated.");
+
+  runNextTest();
+});
+
+addTest(function cleanup() {
+  gWalker = null;
+  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>