n: absolute;
    width: 50px;
    height: 200px;
    background: green;
  }
  .spanner {
    column-span: all;
    height: 5px;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="multicol">
  <div class="rel">
    <div class="spanner"></div>
    <div style="height: 60px; "></div>
    <div class="spanner"></div>
    <div class="abs"></div>
  </div>
</div>