A system and method for enabling programmatic analysis of a graphical program, where the programmatic analysis includes user-defined tests. A software program referred to herein as a graphical program analyzer may be operable to programmatically analyze a graphical program by programmatically performing various tests on the graphical program. Some of the tests may be built in to the graphical program analyzer. The graphical program analyzer may also allow a user to add various user-defined tests. Adding user-defined tests to the graphical program analyzer may allow the functionality of the graphical program analyzer to be extended. When programmatically analyzing a graphical program, the graphical program analyzer may be operable to perform the user-defined tests in addition to the built-in tests.