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<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS test reference</title>
<style>
div {
display: inline-block;
height: 5px;
background: blue;
width: 50px;
color: transparent;
font-size: 100px;
}
</style>
<p>Test passes if there are two, not one, blue lines below.</p>
<div></div><div>a</div>