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Test Info: Warnings

<!DOCTYPE html>
<title>CSS Multi-column Layout Test: ::column pseudo element valid parsing</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script>
test_valid_selector("::column");
test_valid_selector("::column::scroll-marker");
test_valid_selector("::before::column");
test_valid_selector("::before::column::scroll-marker");
</script>