The gmake builder plugin that comes with Bocca provides support for automated regression testing of a project. The tests are Ccaffeine rc files, as introduced in Section 2.2. Tests are stored in the components/tests directory and end in the rc extension. The build system must be informed of the tests to be run by setting or extending the components_TESTS variable in components/make.vars.user. Once this is done, make user-tests will run all the tests defined in components_TESTS.