chromium/third_party/blink/web_tests/fast/multicol/composited-inner-multicol.html

<!DOCTYPE html>
<p>Below you should see the word 'PASS' (with some extra letter spacing), on a yellow background
    (which should be a bit faded near the top). The first S is below the A, because they composite together and hence are not fragmented.</p>
<div style="position:absolute; will-change:transform; left:15em; width:7em; height:3.3em; opacity:0.8; background:white;"></div>
<div style="columns:2; column-gap:0; column-fill:auto; width:30em; height:8em; line-height:2em; orphans:1; widows:1;">
    <br>
    <br>
    <br>
    <br>
    <br>
    <div style="columns:4; column-gap:0; width:4em; margin:0.5em; padding:0.5em; background:yellow;">
        P<br>
        <div style="position:relative;">
            A<br>
            S<br>
        </div>
        S<br>
    </div>
</div>