### Issue Summary The deprecated unittest aliases were removed in python/cpython#28268 in Python 3.11 ### Steps to Reproduce ``` twilio-python/tests/unit/jwt/test_jwt.py: self.assertDictContainsSubset({ twilio-python/tests/unit/jwt/test_client_validation.py: self.assertDictContainsSubset({ twilio-python/tests/unit/jwt/test_client_validation.py: self.assertDictContainsSubset({ ```