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diff --git a/devtools/client/shared/components/test/mochitest/test_tree_08.html b/devtools/client/shared/components/test/mochitest/test_tree_08.html
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+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<!DOCTYPE HTML>
+<html>
+<!--
+Test that when an item in the Tree component is clicked, it steals focus from
+other inputs.
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Tree component test</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">
+  <link rel="stylesheet" href="chrome://devtools/skin/light-theme.css" type="text/css">
+</head>
+<body>
+<pre id="test">
+<script src="head.js" type="application/javascript;version=1.8"></script>
+<script type="application/javascript;version=1.8">
+window.onload = Task.async(function* () {
+  try {
+    const ReactDOM = browserRequire("devtools/client/shared/vendor/react-dom");
+    const React = browserRequire("devtools/client/shared/vendor/react");
+    const { Simulate } = React.addons.TestUtils;
+    const Tree = React.createFactory(browserRequire("devtools/client/shared/components/tree"));
+    const tree = ReactDOM.render(Tree(Object.assign({}, TEST_TREE_INTERFACE, {
+      onFocus: x => setProps(tree, { focused: x }),
+    })), window.document.body);
+
+    const input = document.createElement("input");
+    document.body.appendChild(input);
+
+    input.focus();
+    is(document.activeElement, input, "The text input should be focused.");
+
+    Simulate.click(document.querySelector(".tree-node"));
+    yield forceRender(tree);
+
+    isnot(document.activeElement, input,
+          "The input should have had it's focus stolen by clicking on a tree item.");
+  } catch(e) {
+    ok(false, "Got an error: " + DevToolsUtils.safeErrorString(e));
+  } finally {
+    SimpleTest.finish();
+  }
+});
+</script>
+</pre>
+</body>
+</html>