An aspect of the present invention simplifies maintenance of a software system by indicating the additional bug fixes that are to be tested when a bug is indicated to be fixed. In an embodiment, a user is required to indicate a list of software units and a first bug to indicate that the list of software units have been modified to fix the first bug. An analysis tool identifies a list of use cases, with each use case requiring execution of at least one of the list of software units. The analysis tool then determines a set of dependent bugs fixed earlier in the software system, where each of the set of dependent bugs affects at least one of the list of use cases. The set of dependent bugs are displayed as requiring further testing in view of fixing of the first bug.