chromium/third_party/blink/web_tests/external/wpt/css/css-multicol/spanner-in-opacity.html

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:[email protected]">
<link rel="help" href="https://www.w3.org/TR/css-break-3/">
<link rel="match" href="spanner-in-opacity-ref.html">
<p>Test passes if there is a purple square below.</p>
<div style="columns:2; column-fill:auto; column-gap:0; width:100px; background:blue;">
  <div style="opacity:0.5;">
    <div style="column-span:all; height:100px; background:red;"></div>
  </div>
</div>