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diff --git a/docshell/test/test_bug509055.html b/docshell/test/test_bug509055.html
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+++ b/docshell/test/test_bug509055.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=509055
+-->
+<head>
+  <title>Test for Bug 509055</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=509055">Mozilla Bug 509055</a>
+<p id="display"></p>
+<div id="status"></div>
+<div id="content">
+</div>
+<pre id="test">
+<script type="application/javascript;version=1.7">
+
+/** Test for Bug 509055 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var gGen;
+
+function shortWait() {
+  setTimeout(function() { gGen.next(); }, 0, false);
+}
+
+function onChildHashchange(e) {
+  // gGen might be undefined when we refresh the page, so we have to check here
+  dump("onChildHashchange() called.\n");
+  if(gGen)
+    gGen.next();
+}
+
+function onChildLoad(e) {
+  if(gGen)
+    gGen.next();
+}
+
+function runTest() {
+  var popup = window.open("file_bug509055.html", "popup 0",
+                           "height=200,width=200,location=yes," +
+                           "menubar=yes,status=yes,toolbar=yes,dependent=yes");
+  popup.hashchangeCallback = onChildHashchange;
+  popup.onload = onChildLoad;
+  dump('Waiting for initial load.\n');
+  yield undefined;
+
+  // Without this wait, the change to location.hash below doesn't create a
+  // SHEntry or enable the back button.
+  shortWait();
+  dump('Got initial load.  Spinning event loop.\n');
+  yield undefined;
+
+  popup.location.hash = "#1";
+  dump('Waiting for hashchange.\n');
+  yield undefined;
+
+  popup.history.back();
+  dump('Waiting for second hashchange.\n');
+  yield undefined; // wait for hashchange
+
+  popup.document.title = "Changed";
+
+  // Wait for listeners to be notified of the title change.
+  shortWait();
+  dump('Got second hashchange.  Spinning event loop.\n');
+  yield undefined;
+
+  var sh = SpecialPowers.wrap(popup)
+                        .QueryInterface(SpecialPowers.Ci.nsIInterfaceRequestor)
+                        .getInterface(SpecialPowers.Ci.nsIWebNavigation)
+                        .sessionHistory;
+
+  // Get the title of the inner popup's current SHEntry 
+  var sheTitle = sh.getEntryAtIndex(sh.index, false).title;
+  is(sheTitle, "Changed", "SHEntry's title should change when we change.");
+
+  popup.close();
+
+  SimpleTest.executeSoon(SimpleTest.finish);
+  dump('Final yield.\n');
+  yield undefined;
+}
+
+window.addEventListener('load', function() {
+  gGen = runTest();
+  gGen.next();
+}, false);
+
+</script>
+
+</body>
+</html>
+