<!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 {
  color: transparent;
  background: blue;
  font-family: Ahem;
  font-size: 50px;
  width: 3ch;
}
</style>

<p>Test passes if there is a single blue rectangle below.
<div>
XXX<br>
XXX
</div>
