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<!doctype html>
<meta charset="utf-8">
<link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com">
<p>Test passes if there is a green square containing a smaller black square below.
<div style="width: 2em; height: 2em; background: green;">
<div style="width: 1em; height: 1em; background: black;"></div>
</div>