def suite():
    """ This defines all the tests of a module"""
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(Class1))
suite.addTest(unittest.makeSuite(Class2))
return suite
if __name__ == '__main__':
    unittest.TextTestRunner(verbosity=2).run(suite())
How to organize python test in a way that I can run all tests in a single command?