<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait"> <head> <style> html { color: black; outline-color: inherit; outline-width: 10px; outline-style: solid; } </style> <script> window.addEventListener("MozReftestInvalidate", function() { document.getElementById("x").removeAttribute("style"); document.documentElement.className = ""; }, false); </script> </head> <body style="outline-color: green;"> <html id="x" style="display: none">Test</html> </body> </html>