<!DOCTYPE html>
<html>
<head>
<style>
body {
  zoom: 2;
}
</style>
</head>
<body>
<!-- Test for WK99453: This test passes if you see a green square and no red. -->
<svg xmlns="http://www.w3.org/2000/svg" width="300" height="300">
  <defs>
    <symbol id="sym" width="100%" height="100%">
      <rect x="0%" y="0%" width="100%" height="100%" fill="green"/>
    </symbol>
  </defs>
  <!-- This red square should be covered if the test passes. -->
  <rect x="0" y="0" width="100" height="100" fill="red" />
  <use xlink:href="#sym" x="0" y="0" width="100" height="100"/>
</svg>
</body>
</html>