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<head>
<style>
a:focus { outline-width: 10px; }
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<script>
window.onload = function()
{
    document.getElementById("link").focus();
}
</script>
</head>
<body>
<p>Assuming the port-specific theme draws focus rings, this test can be used to ensure that a focus ring is drawn with an outline width of 10 px.</p>
<a id="link" href="#"/>Test</a>
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</html>