Verify empty :lang() selectors. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS document.querySelectorAll(":lang()").length threw exception SyntaxError: The string did not match the expected pattern.. PASS document.querySelectorAll(":lang() *").length threw exception SyntaxError: The string did not match the expected pattern.. PASS getComputedStyle(document.getElementById("target1")).color is "rgb(0, 0, 0)" PASS successfullyParsed is true TEST COMPLETE