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chromium/third_party/blink/web_tests/fast/multicol/forced-break-too-short-column.html 

<!DOCTYPE html>
<p>The word "PASS" should be seen below.</p>
<div style="columns:2; column-fill:auto; column-gap:0; width:24em; height:50px; line-height:20px;">
    <div style="height:45px;"></div>
    <div style="columns:4; column-gap:0;">
        <div style="height:1px;"></div>
        <div style="break-before:column;">PASS</div>
    </div>
</div>