nested-balanced-inner-column-count-1-with-forced-break.html

<!DOCTYPE html>
<p>There should be a papayawhip square below. It should be aligned in
    the bottom right corner of a hotpink rectangle with a black border.</p>
<div style="columns:2; gap:0; width:80px; line-height:20px; border:1px solid black; background:hotpink;">
    <div style="columns:1;">
        <div style="height:1px;"></div>
        <div style="height:6px; break-before:column;"></div>
        <div style="width:40px; background:papayawhip;">
            <br>
            <br>
        </div>
    </div>
</div>

chromium/third_party/blink/web_tests/fast/multicol/nested-balanced-inner-column-count-1-with-forced-break.html