You missed Tempest. Excerpt from RDO trunk logs (which uses the master branch of oslo.config, not the released version like - iirc - tox):
https://trunk.rdoproject.org/centos7-master-head/64/55/6455980e71abd2300f3ef15400593f479122de83_f98deee5/rpmbuild.log

DEBUG: FAIL: tempest.tests.test_config.TestServiceClientConfig.test_service_client_config_no_service
DEBUG: tags: worker-7
DEBUG: ----------------------------------------------------------------------
DEBUG: Empty attachments:
DEBUG:   stderr
DEBUG:   stdout
DEBUG: Traceback (most recent call last):
DEBUG:   File "tempest/tests/test_config.py", line 32, in setUp
DEBUG:     self.useFixture(fake_config.ServiceClientsConfigFixture())
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 679, in useFixture
DEBUG:     reraise(*exc_info)
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 666, in useFixture
DEBUG:     fixture.setUp()
DEBUG:   File "tempest/tests/fake_config.py", line 97, in setUp
DEBUG:     self.conf.set_default('v3_endpoint_type', 'fake_v3_uri', 'identity')
DEBUG:   File "/usr/lib/python2.7/site-packages/debtcollector/removals.py", line 261, in wrapper
DEBUG:     return f(*args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2312, in __inner
DEBUG:     result = f(self, *args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2659, in set_default
DEBUG:     opt_info['opt'], default, enforce_type)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2665, in _get_enforced_type_value
DEBUG:     converted = self._convert_value(value, opt)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2943, in _convert_value
DEBUG:     return opt.type(value)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/types.py", line 156, in __call__
DEBUG:     repr(value)))
DEBUG: ValueError: Valid values are [public, admin, internal, publicURL, adminURL, internalURL], but found 'fake_v3_uri'
DEBUG: ======================================================================
DEBUG: FAIL: tempest.tests.test_config.TestServiceClientConfig.test_service_client_config_service_all
DEBUG: tags: worker-7
DEBUG: ----------------------------------------------------------------------
DEBUG: Empty attachments:
DEBUG:   stderr
DEBUG:   stdout
DEBUG: Traceback (most recent call last):
DEBUG:   File "tempest/tests/test_config.py", line 32, in setUp
DEBUG:     self.useFixture(fake_config.ServiceClientsConfigFixture())
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 679, in useFixture
DEBUG:     reraise(*exc_info)
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 666, in useFixture
DEBUG:     fixture.setUp()
DEBUG:   File "tempest/tests/fake_config.py", line 97, in setUp
DEBUG:     self.conf.set_default('v3_endpoint_type', 'fake_v3_uri', 'identity')
DEBUG:   File "/usr/lib/python2.7/site-packages/debtcollector/removals.py", line 261, in wrapper
DEBUG:     return f(*args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2312, in __inner
DEBUG:     result = f(self, *args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2659, in set_default
DEBUG:     opt_info['opt'], default, enforce_type)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2665, in _get_enforced_type_value
DEBUG:     converted = self._convert_value(value, opt)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2943, in _convert_value
DEBUG:     return opt.type(value)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/types.py", line 156, in __call__
DEBUG:     repr(value)))
DEBUG: ValueError: Valid values are [public, admin, internal, publicURL, adminURL, internalURL], but found 'fake_v3_uri'
DEBUG: ======================================================================
DEBUG: FAIL: tempest.tests.test_config.TestServiceClientConfig.test_service_client_config_service_minimal
DEBUG: tags: worker-7
DEBUG: ----------------------------------------------------------------------
DEBUG: Empty attachments:
DEBUG:   stderr
DEBUG:   stdout
DEBUG: Traceback (most recent call last):
DEBUG:   File "tempest/tests/test_config.py", line 32, in setUp
DEBUG:     self.useFixture(fake_config.ServiceClientsConfigFixture())
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 679, in useFixture
DEBUG:     reraise(*exc_info)
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 666, in useFixture
DEBUG:     fixture.setUp()
DEBUG:   File "tempest/tests/fake_config.py", line 97, in setUp
DEBUG:     self.conf.set_default('v3_endpoint_type', 'fake_v3_uri', 'identity')
DEBUG:   File "/usr/lib/python2.7/site-packages/debtcollector/removals.py", line 261, in wrapper
DEBUG:     return f(*args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2312, in __inner
DEBUG:     result = f(self, *args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2659, in set_default
DEBUG:     opt_info['opt'], default, enforce_type)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2665, in _get_enforced_type_value
DEBUG:     converted = self._convert_value(value, opt)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2943, in _convert_value
DEBUG:     return opt.type(value)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/types.py", line 156, in __call__
DEBUG:     repr(value)))
DEBUG: ValueError: Valid values are [public, admin, internal, publicURL, adminURL, internalURL], but found 'fake_v3_uri'
DEBUG: ======================================================================
DEBUG: FAIL: tempest.tests.test_config.TestServiceClientConfig.test_service_client_config_service_unknown
DEBUG: tags: worker-7
DEBUG: ----------------------------------------------------------------------
DEBUG: Empty attachments:
DEBUG:   stderr
DEBUG:   stdout
DEBUG: Traceback (most recent call last):
DEBUG:   File "tempest/tests/test_config.py", line 32, in setUp
DEBUG:     self.useFixture(fake_config.ServiceClientsConfigFixture())
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 679, in useFixture
DEBUG:     reraise(*exc_info)
DEBUG:   File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 666, in useFixture
DEBUG:     fixture.setUp()
DEBUG:   File "tempest/tests/fake_config.py", line 97, in setUp
DEBUG:     self.conf.set_default('v3_endpoint_type', 'fake_v3_uri', 'identity')
DEBUG:   File "/usr/lib/python2.7/site-packages/debtcollector/removals.py", line 261, in wrapper
DEBUG:     return f(*args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2312, in __inner
DEBUG:     result = f(self, *args, **kwargs)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2659, in set_default
DEBUG:     opt_info['opt'], default, enforce_type)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2665, in _get_enforced_type_value
DEBUG:     converted = self._convert_value(value, opt)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2943, in _convert_value
DEBUG:     return opt.type(value)
DEBUG:   File "/usr/lib/python2.7/site-packages/oslo_config/types.py", line 156, in __call__
DEBUG:     repr(value)))
DEBUG: ValueError: Valid values are [public, admin, internal, publicURL, adminURL, internalURL], but found 'fake_v3_uri'