<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
:cue { color: red; }
:cue(i) { color: red; }
</style>
<script>
test(function() {
  assert_equals(document.styleSheets[0].cssRules.length, 0);
}, ":cue pseudo-class is not supported and dropped during parsing");
</script>