chromium/third_party/blink/web_tests/accessibility/media-controls.html

<!DOCTYPE HTML>
<html>
  <body>
    <script src="../resources/js-test.js"></script>
    <script>
      description("This tests that the script creation of an audio element with controls works when accessibility is enabled and does not crash.");

      if (window.testRunner && window.accessibilityController) {
          function createAudio() {
              var audio = document.createElement('audio');
              audio.setAttribute('controls', 'controls');
              document.documentElement.appendChild(audio);
          }
          window.onload = createAudio;
      }
    </script>
  </body>
</html>