chromium/third_party/blink/web_tests/virtual/text-antialias/zero-font-size-2.html

<div style="padding-left: 12px; padding-top: 20px; background-color: green; height: 12px;">
    <span style="padding-top: 1px; font-family: Ahem; font-size: 0; word-spacing: 12px; color: red;
        -webkit-font-smoothing: none;">
        l o r e m i s u m d o l o r
    </span>
</div>