<!DOCTYPE html>
<title>Filter Effects Test: feImage referencing an data URL</title>
<link rel="help" href="https://drafts.fxtf.org/filter-effects/#feImageElement">
<link rel="match" href="reference/svg-feimage-ref.html">
<p>The test passes if you see a black square and no red.</p>
<svg width="500" height="500">
  <defs>
    <filter id="filter" x="0" y="0" width="1" height="1">
      <feImage href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'>
                                          <rect y='