<!DOCTYPE html> <html class="reftest-wait"> <!-- Test: if select has a custom error, it should be affected by :-moz-ui-invalid pseudo-class. --> <link rel='stylesheet' type='text/css' href='style.css'> <body onload="document.getElementById('s').selectedIndex = 0; document.forms[0].reset(); document.documentElement.className='';"> <form> <select id='s' class='notinvalid' id='s' required> <option value="">foo</option> </select> </form> </body> </html>