firefox/testing/web-platform/tests/css/css-transforms/transform-blank-ref.html

<!DOCTYPE html>
<html>
  <head>
    <title>CSS Reftest Reference</title>
    <link rel="author" title="Aryeh Gregor" href="mailto:[email protected]">
  </head>
  <body>
    <p>Nothing should appear except this sentence.</p>
  </body>
</html>