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diff --git a/layout/reftests/css-display/display-contents-style-inheritance-1-stylechange.html b/layout/reftests/css-display/display-contents-style-inheritance-1-stylechange.html
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+<!DOCTYPE html>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html lang="en-US" class="reftest-wait">
+<head>
+  <meta charset="utf-8">
+  <title>CSS Test: CSS display:contents; style inheritance, style changes</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=907396">
+  <link rel="help" href="http://dev.w3.org/csswg/css-display">
+<style type="text/css">
+body,span { color:black; background-color:white; }
+.test { display:contents; border:10px solid black; }
+.test2 { display:contents; border-style:none; }
+.test3:not(:lang(foo)) { display:contents; color:cyan; }
+#t18:lang(foo) { display:contents; color:red; }
+.green { color:green; }
+.border { border-left:1px solid green; }
+b { border:inherit; font-weight:normal; }
+</style>
+<script>
+function runTest() {
+  var elms = document.querySelectorAll('.test')
+  for (i=0; i < elms.length; ++i) {
+    elms[i].classList.remove('test');
+    elms[i].classList.add('test2');
+  }
+  // FIXME(emilio): This basically does a full subtree restyle, and could hide
+  // bugs in the previous parts of the test.
+  document.body.lang = 'foo';
+  document.body.offsetWidth;
+
+  document.documentElement.className = '';
+}
+</script>
+</head>
+<body onload="setTimeout(runTest,0)">
+<span class="green"><div class="test">green</div></span>
+<span class="green"><div class="test">green</div>x</span>
+<span><div class="test green">green</div></span>
+<span><div class="test green">green</div>x</span>
+<br>
+<span><div class="test border">no border</div></span>
+<span><div class="test border"><span>no border</span></div></span>
+<span class="border"><div class="test"><b>1px green left border</b></div></span>
+<span class="border"><div class="test" style="border:inherit"><b>2px green left border</b></div></span>
+<br>
+
+<span class="green"><div class="test"><div class="test">green</div></div></span>
+<span><div class="test green"><div class="test">green</div></div></span>
+<br>
+<span class="border"><div class="test"><div class="test"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test"><div class="test" style="border:inherit"><b>1px green left border</b></div></div></span>
+<span class="border"><div class="test" style="border:inherit"><div class="test" style="border:inherit"><b>2px green left border</b></div></div></span>
+</body>
+</html>