 base size stretches into the available size when it has no specified intrinsic sizes." />

<style>
#reference-overlapped-red {
  position: absolute;
  background-color: red;
  width: 100px;
  height: 100px;
  z-index: -1;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="reference-overlapped-red"></div>

<div style="display: flex; width: 100px;">
  <svg viewBox="0 0 200 200">
    <rect width="100%" height="100%" fill="green" />
  </svg>
</div>
