chromium/third_party/blink/web_tests/fast/media/mq-scan-01.html

<!DOCTYPE html>
<html>
<head>
<title>Media Queries - scan media feature for "screen"</title>
<script>
  if (window.testRunner) {
    /* The scan media feature only applies to "tv" media. This test checks that
       we don't match any of the values for "screen". */
    internals.settings.setMediaTypeOverride("screen");
  }
</script>
<style>
  @media (scan: progressive) {
    #t1 { color: red; }
  }

  @media (scan: interlace) {
    #t2 { color: red; }
  }

  @media (scan) {
    #t3 { color: red; }
  }
</style>
</head>
<body>
  <div id="t1">Should not be red</div>
  <div id="t2">Should not be red</div>
  <div id="t3">Should not be red</div>
</body>
</html>