Animations on :before and :after pseudo elements should run On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS successfullyParsed is true TEST COMPLETE PASS div.offsetWidth is 52 PASS div.offsetWidth is within 1 of 20 PASS computedTop is within 1 of 170 PASS div.offsetWidth is within 1 of 12 PASS computedTop is within 1 of 200 PASS div.offsetWidth is 52 PASS div.offsetWidth is within 1 of 20 PASS computedTop is within 1 of 170 PASS div.offsetWidth is within 1 of 12 PASS computedTop is within 1 of 200 PASS successfullyParsed is true TEST COMPLETE