chromium/third_party/blink/web_tests/external/wpt/html/rendering/non-replaced-elements/the-page/body-margin-2i.html

<!doctype html>
<meta charset=utf-8>
<title>Test that body's marginheight attribute takes precedence over other body margin presentational attributes in standards mode</title>
<link rel=match href="body-margin-2-ref.html">
<iframe marginheight="20" src="data:text/html,<!doctype html><body marginheight='100' topmargin='40' bottommargin='50'>100px top/bottom margins, default left/right margins</body>"></iframe>