A method for instrumenting an update to a software application may include determining, based on a source code file affected by the update to the software application, a first method affected by the update to the software application. A second method called by the first method and a third method called by the second method may also be identified as being affected by the update to the software application. A user interface file that includes a call to the first method, the second method, and/or the third method may be identified. The functional impact of the update may be determined by identifying one or more functional flows that match the user interface file. A recommendation identifying the one or more matching functional flows as candidates for testing may be generated. Related systems and computer program products are also provided.