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diff --git a/layout/style/test/test_setPropertyWithNull.html b/layout/style/test/test_setPropertyWithNull.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=830260
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 830260</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <script type="application/javascript">
+
+ /** Test for Bug 830260 **/
+ var div = document.createElement("div");
+ div.style.color = "green";
+ div.style.color = "null";
+ is(div.style.color, "green", 'Assigning "null" as a color should not parse');
+ div.style.setProperty("color", "null");
+ is(div.style.color, "green",
+ 'Passing "null" as a color to setProperty should not parse');
+
+ div.style.setProperty("color", null);
+ is(div.style.color, "",
+ 'Passing null as a color to setProperty should remove the property');
+
+ div.style.color = "green";
+ is(div.style.color, "green", 'Assigning "green" as a color should parse');
+
+ div.style.color = null;
+ is(div.style.color, "",
+ 'Assigning null as a color should remove the property');
+
+
+
+
+ </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=830260">Mozilla Bug 830260</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>