<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>CSS Test: font-size-adjust property</title>
    <link rel="help" href="https://www.w3.org/TR/css-fonts-5/#font-size-adjust-prop">
    <meta name="assert" content="Test whether from-font automatically determines a font-size-adjust value based on the primary font.">
    <style>
        @font-face {
            font-family: 'primary-font-ahem-ex-500';
            src: url('./resources/ahem-ex-500.otf');
        }
        @font-face {
         