adjacent-spanners-with-margin.html | Explore in Territory

<!DOCTYPE html>
<p>Test that adjoining margins on adjacent spanners collapse.</p>
<p>There should be a blue square below.</p>
<div style="-webkit-columns:3; width:10em; background:blue;">
    <div style="-webkit-column-span:all; margin-bottom:10em; background:white;"></div>
    <div style="-webkit-column-span:all; margin-top:10em; background:white;"></div>
</div>

chromium/third_party/blink/web_tests/fast/multicol/span/adjacent-spanners-with-margin.html