<!DOCTYPE html>
<meta charset="utf-8">
<title>test reference</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
div {
font-family: Ahem;
color: transparent;
font-size: 50px;
background: green;
width: 1em;
}
</style>
<p>Test passes if there is a green rectangle below and no red.
<div>X<br>X</div>