<!DOCTYPE html>
<p>Test that using fixed margins on spanners works.</p>
<p>Below there should be yellow square centered inside a blue square, and no red.</p>
<div style="-webkit-columns:3; width:300px; background:blue;">
    <div style="-webkit-column-span:all; margin:50px; height:200px; background:red;">
        <div style="height:100%; background:yellow;"></div>
    </div>
</div>