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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Values and Units Test Reference File</title>
<style>
.ref {
width: 200px;
height: 200px;
background: green;
}
</style>
<body>
<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
<div class="ref"></div>
</body>