CONSOLE ERROR: Refused to load the image 'http://www.myfakesiteabc.com/image.png' because it violates the following Content Security Policy directive: "img-src 'self'". This tests onerror event is fired if we change image src to a url blocked by content-security-policy. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS error event fired. PASS successfullyParsed is true TEST COMPLETE