gecko-dev/layout/reftests/css-ui-valid/input/input-dyn-not-disabled.html

<!DOCTYPE html>
<html class="reftest-wait">
  <!-- Test: if input is not disabled but its value hasn't been changed,
             it should not be affected by :-moz-ui-valid pseudo-class. -->
  <link rel='stylesheet' type='text/css' href='style.css'>
  <body onload="document.getElementById('i').removeAttribute('disabled');
                document.documentElement.className='';">
    <input class='notvalid' id='i' disabled>
  </body>
</html>