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diff --git a/testing/web-platform/tests/quirks/line-height-calculation.html b/testing/web-platform/tests/quirks/line-height-calculation.html
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+++ b/testing/web-platform/tests/quirks/line-height-calculation.html
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+<!doctype html>
+<html>
+ <head>
+  <title>The line height calculation quirk</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <style> iframe { width:200px; height:20px; } </style>
+ </head>
+ <body>
+  <div id=log></div>
+  <iframe id=quirks></iframe>
+  <iframe id=almost></iframe>
+  <iframe id=standards></iframe>
+  <script>
+    setup({explicit_done:true});
+
+    var png = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACklEQVR4nGMAAQAABQABDQottAAAAABJRU5ErkJggg==";
+    var preload = new Image();
+    preload.src = png;
+
+    onload = function() {
+        var html = "<style id=style></style>";
+        var a_doctype = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';
+        var s_doctype = '<!DOCTYPE HTML>';
+        var q = document.getElementById('quirks').contentWindow;
+        var a = document.getElementById('almost').contentWindow;
+        var s = document.getElementById('standards').contentWindow;
+        q.document.open();
+        q.document.write(html);
+        q.document.close();
+        a.document.open();
+        a.document.write(a_doctype + html);
+        a.document.close();
+        s.document.open();
+        s.document.write(s_doctype + html);
+        s.document.close();
+        [q, a, s].forEach(function(win) {
+            ['style', 'test', 'ref', 's_ref'].forEach(function(id) {
+                Object.getPrototypeOf(win).__defineGetter__(id, function() { return win.document.getElementById(id); });
+            });
+        });
+
+        var tests = [
+        {style:'', body:'<div id=test><img src="{png}"></div><img id=ref src="{png}"><div id=s_ref>x</div>'},
+        {style:'', body:'<div id=test><img src="{png}"> <img src="{png}"></div><div id=ref>x</div><div id=s_ref>x</div>'},
+        {style:'', body:'<table><tr><td id=test><img src="{png}"><tr><td><img id=ref src="{png}"><tr><td id=s_ref>x</table>'},
+        {style:'', body:'<table><tr><td id=test><img src="{png}"> <img src="{png}"><tr><td id=ref>x<tr><td id=s_ref>x</table>'},
+        {style:'', body:'<pre id=test><img src="{png}"></pre><img id=ref src="{png}"><pre id=s_ref>x</pre>'},
+        {style:'', body:'<pre id=test><img src="{png}"> </pre><pre id=ref>x</pre><pre id=s_ref>x</pre>'},
+        {style:'span { margin:1px }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref>x</div>'},
+        {style:'span { padding:1px 0 }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref></div>'},
+        {style:'span { margin:0 1px }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref>x</div>'},
+        {style:'span { margin:0 1px; padding:1px 0 }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref>x</div>'},
+        {style:'span { border-width:1px 0; border-style:solid }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref></div>'},
+        {style:'span { border-width:1px; border-style:solid none }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref></div>'},
+        {style:'span { border-width:1px; border-style:solid hidden }', body:'<div id=test><span></span></div><div id=ref></div><div id=s_ref></div>'},
+        {style:'span { border-right:1px solid }', body:'<div id=test><span></span></div><div id=ref>x</div><div id=s_ref>x</div>'},
+        {style:'span { border-left:1px solid }', body:'<div id=test><span></span></div><div id=ref>x</div><div id=s_ref>x</div>'},
+        {style:'span { padding-right:1px }', body:'<div id=test><span></span></div><div id=ref>x</div><div id=s_ref>x</div>'},
+        {style:'span { padding-left:1px }', body:'<div id=test><span></span></div><div id=ref>x</div><div id=s_ref>x</div>'},
+        {style:'span { display:inline-block; height:1px }', body:'<div id=test><i><span></span> </i></div><span id=ref></span><div id=s_ref>x</div>'}, /* 16.6.1: "If a space (U+0020) at the end of a line has 'white-space' set to 'normal', 'nowrap', or 'pre-line', it is also removed." */
+        {style:'', body:'<div id=test><img src="{png}" border=1></div><img id=ref src="{png}" height=3><div id=s_ref>x</div>'},
+        {style:'#test img { padding:1px }', body:'<div id=test><img src="{png}"></div><img id=ref src="{png}" height=3><div id=s_ref>x</div>'},
+        {style:'iframe { height:1px }', body:'<div id=test><iframe></iframe></div><img id=ref src="{png}" height=5><div id=s_ref>x</div>'},
+        {style:'#test::before { content:"" } #test::before, span { border:solid }', body:'<div id=test></div><div id=ref><span>x</span></div><div id=s_ref><span>x</span></div>'},
+        {style:'div { line-height: 0;} span { margin:0 1px; line-height: normal; }', body:'<div id=test>x<span></span></div><div id=ref>x</div><div id=s_ref>x<span>x</span></div>'},
+        ];
+
+        tests.forEach(function(t) {
+            test(function() {
+                var style = t.style.replace(/\{png\}/g, png);
+                var body = t.body.replace(/\{png\}/g, png);
+                q.style.textContent = style;
+                a.style.textContent = style;
+                s.style.textContent = style;
+                q.document.body.innerHTML = body;
+                a.document.body.innerHTML = body;
+                s.document.body.innerHTML = body;
+
+                assert_equals(q.getComputedStyle(q.test).height,
+                              q.getComputedStyle(q.ref).height,
+                              'quirks mode');
+                assert_equals(a.getComputedStyle(a.test).height,
+                              a.getComputedStyle(a.ref).height,
+                              'almost standards mode');
+                assert_equals(s.getComputedStyle(s.test).height,
+                              s.getComputedStyle(s.s_ref).height,
+                              'standards mode');
+            }, document.title+', '+t.style+t.body);
+        });
+
+        done();
+    }
+  </script>
+ </body>
+</html>