<!DOCTYPE html>
<html>
<body>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
test(function() {
    assert_equals(document.implementation.createCSSStyleSheet, undefined);
}, "DOMImplementation.createCSSStyleSheet should not exist");
</script>
</body>
</html>