<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>mfrac with zero children</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#mfrac">
<meta name="assert" content="An mfrac with no children should render using an empty mrow.">
<link rel="match" href="frac-invalid-ref.html">
</head>
<body>
  <p>This test passes if mfrac renders nothing.</p>
  <math>
    <mfrac>
    </mfrac>
  </math>
</body>
</html>
