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Test Info:

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div style="width:100px; background:red;">
<div id="container" style="columns:3; column-gap:0; column-fill:auto; width:fit-content; height:100px; background:green;">
<div style="width:25px; height:10px;"></div>
</div>
</div>
<script>
document.body.offsetTop;
container.style.columns = "4";
</script>