The present subject matter relates to defect reporting in application testing. In an implementation, a category of application testing is determined based on a testing instance of an application. The category of application testing is indicative of an aspect of the application, being tested. A list of previously reported defects associated with the determined category of application testing is displayed in a display layer over the testing instance of the application. A first user-input indicative of one of acceptance and rejection of a previously reported defect, from the list, with respect to the testing instance of the application is received. The first user-input is aggregated with previous user-inputs indicative of one of acceptance and rejection of the previously reported defect. It is determined whether the previously reported defect is irrelevant to the testing instance of the application based on the aggregation.