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diff --git a/dom/xslt/tests/mochitest/test_bug551412.html b/dom/xslt/tests/mochitest/test_bug551412.html
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+++ b/dom/xslt/tests/mochitest/test_bug551412.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=551412
+-->
+<head>
+  <title>Test for Bug 551412</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.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=551412">Mozilla Bug 551412</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 551412 **/
+
+  var processor = new XSLTProcessor();
+  var style =
+    '<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" ' +
+                    'xmlns:exsl="http://exslt.org/common" ' +
+                    'version="1.0">' +
+      '<xsl:output method="html"/>' +
+      '<xsl:variable name="rtf">1 <b>2</b> 3</xsl:variable>' +
+      '<xsl:template match="/">' +
+        '<xsl:copy-of select="exsl:node-set($rtf)"/>' +
+      '</xsl:template>' +
+    '</xsl:stylesheet>';
+  var styleDoc = new DOMParser().parseFromString (style, "text/xml");
+
+  var data =
+    '<root/>';
+  var originalDoc = new DOMParser().parseFromString(data, "text/xml");
+
+  processor.importStylesheet(styleDoc);
+
+  var fragment = processor.transformToFragment(originalDoc, document);
+  var content = document.getElementById("content");
+  content.appendChild(fragment);
+  is(content.innerHTML, "1 <b>2</b> 3",
+     "Result of transform should be '1 <b>2</b> 3'");
+
+</script>
+</pre>
+</body>
+</html>