chromium/third_party/blink/web_tests/fast/multicol/intrinsic-width.html

<!DOCTYPE html>
<title>Intrinsic width calculation</title>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div style="float:left; background: green;">
  <div style="column-count: 2; column-gap: 0;">
    <div style="width: 50px; height: 100px;"></div>
    <div style="width: 50px; height: 100px;"></div>
  </div>
</div>