Systems and techniques are described for identifying test gaps. A described technique includes identifying production code paths for an application. Each production code path specifies a respective sequence of code of the application that was executed in a production environment. Test code paths are identified for the application. Each test code path specifies a respective sequence of the application that was tested in a test environment. The production code paths are compared to the test code paths to identify a set of test gaps for the application. Each test gap specifies a respective production code path that is not included in the test code paths. Test gap data specifying the test gaps for the application can be provided for presentation to a user.