<!DOCTYPE html> <link rel="help" href="https://www.w3.org/TR/css-break-3/#breaking-rules"> <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#the-fieldset-and-legend-elements"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <style> #multicol { columns:2; column-gap:0; column-fill:auto; width:100px; height:100px; margin-left:-50px; } fieldset { border:none; margin:0; padding:0px; width:50px; } legend { padding:0px; margin:0px; width:50px; height:100px; background: green; } #abs { position:absolute; width:100px; height:100px; background:red; z-index:-1; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div id="abs"></div> <div id="multicol"> <div style="height:50px;"></div> <fieldset> <legend></legend> <div style="height:100px; background:green;"></div> </fieldset> </div>