Verify that the priority parameter is a case-insensitive match to 'important' or the empty string. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS e.style.getPropertyValue('border-bottom-style') is "" PASS e.style.getPropertyPriority('border-bottom-style') is '' PASS e.style.getPropertyValue('border-bottom-style') is "" PASS e.style.getPropertyPriority('border-bottom-style') is '' PASS e.style.getPropertyValue('border-bottom-style') is 'solid' PASS e.style.getPropertyPriority('border-bottom-style') is 'important' PASS e.style.getPropertyValue('border-bottom-style') is "" PASS e.style.getPropertyPriority('border-bottom-style') is '' PASS e.style.getPropertyValue('border-bottom-style') is "" PASS e.style.getPropertyPriority('border-bottom-style') is '' PASS e.style.getPropertyValue('border-bottom-style') is 'solid' PASS e.style.getPropertyPriority('border-bottom-style') is '' PASS successfullyParsed is true TEST COMPLETE