<!DOCTYPE html>
<html>
<head>
<style>
@font-face {
    font-family: "WebFont";
    src: local("system-ui");
}
</style>
</head>
<body>
This test makes sure that local("system-ui") works in @font-face blocks. The test passes if the text below is drawn in the system font.
<div style="font: 100px 'WebFont';">Hello</div>
</body>
</html>