<!DOCTYPE html>
<html class="reftest-wait">
  <link rel='stylesheet' type='text/css' href='style.css'>
  <body onload="document.getElementById('i1').setCustomValidity('foo');
                if (document.getElementById('i1').matches(':valid') ||
                    !document.getElementById('i2').matches(':valid')) {
                  document.body.textContent='FAIL';
                } else {
                  document.body.textContent='SUCCESS';
                }
                document.documentElement.className='';">
    <input id='i1' name='foo' type='radio'>
    <input id='i2' name='foo' type='radio'>
  </body>
</html>