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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Images Reference: filled green square</title>
<style>
iframe {
display: block;
width: 200px;
height: 400px;
border: none;
}
</style>
<p>Test passes if there is a filled green square and no red.</p>
<iframe src="support/linear-gradient-viewport-units-ref-iframe.html"></iframe>