import unittest

def suite():
    test_suite = unittest.TestSuite()
    all_test_suite = unittest.defaultTestLoader.discover("tests", pattern="test_*.py")
    for ts in all_test_suite:
        test_suite.addTest(ts)
    return test_suite


if __name__ == "__main__":
    mySuite = suite()
    unittest.TextTestRunner().run(mySuite)