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Test Info:

<!DOCTYPE html>
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<p>Test passes if there is a filled green square.</p>
<div style="columns:2; column-fill:auto; gap:0; width:100px; height:200px;">
<div style="width:50px; height:100px; background:green;"></div>
<div>
<div style="contain:size; break-before:column; height:100px; width:50px; background:green;"></div>
</div>
</div>