<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Non-reference case for text-decoration-thickness</title>
    <link rel="stylesheet" type="text/css" href="/fonts/ahem.css">
    <style>
        #main {
            display: flex;
        }
        div span {
            text-decoration: green underline;
            text-decoration-skip-ink: none;
            font: 20px/1 Ahem;
            color: transparent;
            padding-right: 1em;
        }
    </style>
</head>
<body>
    <p>Test passes if the right has a thick green underline</p>
    <div id="main">
        <div>left<span>XXXX</span></div>
        <div><span>XXXX</span>right</div>
    </div>
</body>
</html>