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diff --git a/layout/reftests/css-grid/grid-abspos-items-011-ref.html b/layout/reftests/css-grid/grid-abspos-items-011-ref.html
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+++ b/layout/reftests/css-grid/grid-abspos-items-011-ref.html
@@ -0,0 +1,82 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>CSS Grid Test: abs pos areas in empty grid</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1215099">
+  <style type="text/css">
+
+div {
+  display: block;
+  position: relative;
+  float: left;
+  width: 20px;
+  height: 20px;
+  background: red;
+}
+x div {
+  padding: 4px;
+  background: white;
+}
+
+span {
+  position: absolute;
+  top:0;left:0;bottom:0;right:0;
+  background: lime;
+}
+
+</style>
+</head>
+<body>
+
+There should be no red areas.
+<br clear="all">
+
+<div><span class="cs"></span></div>
+<div><span class="ce"></span></div>
+<div><span class="rs"></span></div>
+<div><span class="re"></span></div>
+
+<div><span class="cs ce"></span></div>
+<div><span class="cs rs"></span></div>
+<div><span class="cs re"></span></div>
+<div><span class="ce rs"></span></div>
+<div><span class="ce re"></span></div>
+<div><span class="rs re"></span></div>
+
+<div><span class="cs ce rs"></span></div>
+<div><span class="cs ce re"></span></div>
+<div><span class="rs re cs"></span></div>
+<div><span class="rs re ce"></span></div>
+
+<div><span class="cs ce rs re"></span></div>
+
+<br clear="all">
+<br clear="all">
+
+<x>
+<div><span class="cs" style="left:4px"></span></div>
+<div><span class="ce" style="right:auto;width:4px"></span></div>
+<div><span class="rs" style="top:4px"></span></div>
+<div><span class="re" style="bottom:auto;height:4px"></span></div>
+
+<div><span class="cs ce" style="left:4px;"></span></div>
+<div><span class="cs rs" style="left:4px;top:4px"></span></div>
+<div><span class="cs re" style="left:4px;bottom:auto;height:4px"></span></div>
+<div><span class="ce rs" style="right:auto;width:4px;top:4px"></span></div>
+<div><span class="ce re" style="right:auto;width:4px;bottom:auto;height:4px"></span></div>
+<div><span class="rs re" style="top:4px"></span></div>
+
+<div><span class="cs ce rs" style="left:4px;top:4px"></span></div>
+<div><span class="cs ce re" style="left:4px;bottom:auto;height:4px"></span></div>
+<div><span class="rs re cs" style="left:4px;top:4px"></span></div>
+<div><span class="rs re ce" style="top:4px;right:auto;width:4px"></span></div>
+
+<div><span class="cs ce rs re" style="left:4px;top:4px"></span></div>
+</x>
+
+</body>
+</html>