chromium/third_party/blink/web_tests/external/wpt/infrastructure/expected-fail/failing-test.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>Failing test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(function() {
  assert_unreached("Expected failure");
});
</script>