multicol-fill-balance-002.html
<!DOCTYPE html>
<title>CSS Multi-column Layout Test: Balancing with more forced breaks than columns</title>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<link rel="help" href="https://www.w3.org/TR/css-multicol-1/#cf" title="7.1. column-fill">
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<meta name="assert" content="This multicol container will create overflowing columns, no matter what, due to forced break. Don't overstretch.">
<p>Test passes if there is a filled green square.</p>
<div style="columns:2; column-gap:0; width:100px; background:green;">
<div style="height:100px;"></div>
<div style="break-before:column; height:90px;"></div>
<div style="break-before:column; height:10px;"></div>
</div>