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diff --git a/layout/reftests/css-grid/grid-item-canvas-001-ref.html b/layout/reftests/css-grid/grid-item-canvas-001-ref.html
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+++ b/layout/reftests/css-grid/grid-item-canvas-001-ref.html
@@ -0,0 +1,57 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>Reference: stretching canvas item</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1176775">
+  <style type="text/css">
+body,html { color:black; background:white; font:16px/1 monospace; padding:0; margin:0; }
+
+.block {
+  float: left;
+  border:1px solid;
+  line-height:0;
+}
+canvas:nth-child(1n) { background: blue; }
+canvas:nth-child(2n) { background: grey; }
+canvas:nth-child(3n) { background: tan; }
+canvas:nth-child(4n) { background: black; }
+.sz > canvas {
+  width:20px; height:10px;
+}
+.sz.t2 > canvas {
+  width:10px; height:20px;
+}
+canvas {
+  vertical-align:top;
+}
+  </style>
+</head>
+<body>
+
+<div class="block sz">
+<canvas></canvas><canvas style="margin-left:-5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:15px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:-5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:15px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas></div>
+
+<div class="block sz t2">
+<canvas></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:25px"></canvas><canvas style="margin-left:25px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:25px"></canvas><canvas style="margin-left:25px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas><canvas style="margin-left:5px"></canvas></div>
+
+<br clear=all>
+<br clear=all>
+
+<div class="block" style="height:150px; width:215px; white-space:pre">
+<canvas style="width:195px; height:150px; background:black"></canvas><canvas style="width:220px; height:150px; background:tan"></canvas></div>
+
+
+<div class="block" style="height:300px; width:600px"><canvas style="width:300px;height:150px"></canvas><canvas style="width:300px;height:150px"></canvas><canvas style="width:300px;height:150px"></canvas><canvas style="width:300px;height:150px"></canvas></div>
+
+<br clear=all>
+<br clear=all>
+
+<div class="block" style="height:60px; width:600px; white-space:pre">
+<span style="display:inline-block; height:60px; margin-top:-90px"><canvas style="background:tan; vertical-align:bottom"></canvas><canvas style="background:black; vertical-align:bottom"></canvas></span></div>
+
+</body>
+</html>