<!DOCTYPE html>
<html>
<body style="font-family: ahem; -webkit-font-smoothing: none;">
<!-- Test passes if A (blue box) in first line, followed by B (green box) in next line. -->
<style>
span:before {
    display: block;
    content: "A";
    color: blue;
}
</style>                         
<span style="color: green"><div></div>B</span>
<script>
    document.body.style.fontSize = "200px";
</script>
</body>
</html>