<!doctype html>
<title>legend display: none</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
 legend { display: none; }
</style>
<fieldset>
 <legend>Foo</legend>
</fieldset>
<script>
 test(() => {
   const display = getComputedStyle(document.querySelector('legend')).display;
   assert_equals(display, 'none');
 });
</script>