diff --git a/tempest/tests/fake_config.py b/tempest/tests/fake_config.py
index e941606..8a8ebb0 100644
--- a/tempest/tests/fake_config.py
+++ b/tempest/tests/fake_config.py
@@ -12,49 +12,33 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from oslo.config import cfg
 
-class FakeConfig(object):
+from tempest import config
+from tempest.openstack.common.fixture import config as conf_fixture
 
-    class fake_compute(object):
-        build_interval = 10
-        build_timeout = 10
 
-    class fake_identity(object):
-        disable_ssl_certificate_validation = True
-        catalog_type = 'identity'
-        uri = 'http://fake_uri.com/auth'
-        uri_v3 = 'http://fake_uri_v3.com/auth'
+class ConfigFixture(conf_fixture.Config):
 
-    class fake_default_feature_enabled(object):
-        api_extensions = ['all']
+    def __init__(self):
+        config.register_opts()
+        super(ConfigFixture, self).__init__()
 
-    class fake_compute_feature_enabled(fake_default_feature_enabled):
-        api_v3_extensions = ['all']
+    def setUp(self):
+        super(ConfigFixture, self).setUp()
+        self.conf.set_default('build_interval', 10, group='compute')
+        self.conf.set_default('build_timeout', 10, group='compute')
+        self.conf.set_default('disable_ssl_certificate_validation', True,
+                              group='identity')
+        self.conf.set_default('uri', 'http://fake_uri.com/auth',
+                              group='identity')
+        self.conf.set_default('uri_v3', 'http://fake_uri_v3.com/auth',
+                              group='identity')
+        self.conf.set_default('neutron', True, group='service_available')
+        self.conf.set_default('heat', True, group='service_available')
 
-    class fake_object_storage_discoverable_apis(object):
-        discoverable_apis = ['all']
 
-    class fake_service_available(object):
-        nova = True
-        glance = True
-        cinder = True
-        heat = True
-        neutron = True
-        swift = True
-        horizon = True
-
-    class fake_negative(object):
-        test_generator = 'tempest.common.' \
-            'generator.negative_generator.NegativeTestGenerator'
-
-    compute_feature_enabled = fake_compute_feature_enabled()
-    volume_feature_enabled = fake_default_feature_enabled()
-    network_feature_enabled = fake_default_feature_enabled()
-    object_storage_feature_enabled = fake_object_storage_discoverable_apis()
-
-    service_available = fake_service_available()
-
-    compute = fake_compute()
-    identity = fake_identity()
-
-    negative = fake_negative()
+class FakePrivate(config.TempestConfigPrivate):
+    def __init__(self):
+        cfg.CONF([], default_config_files=[])
+        self._set_attrs()
diff --git a/tempest/tests/negative/test_negative_auto_test.py b/tempest/tests/negative/test_negative_auto_test.py
index 27ddc95..7a1909a 100644
--- a/tempest/tests/negative/test_negative_auto_test.py
+++ b/tempest/tests/negative/test_negative_auto_test.py
@@ -15,6 +15,7 @@
 
 import mock
 
+from tempest import config
 import tempest.test as test
 from tempest.tests import base
 from tempest.tests import fake_config
@@ -38,7 +39,8 @@
 
     def setUp(self):
         super(TestNegativeAutoTest, self).setUp()
-        self.stubs.Set(test, 'CONF', fake_config.FakeConfig)
+        self.useFixture(fake_config.ConfigFixture())
+        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
 
     def _check_prop_entries(self, result, entry):
         entries = [a for a in result if entry in a[0]]
diff --git a/tempest/tests/test_auth.py b/tempest/tests/test_auth.py
index df04d65..b6e15bd 100644
--- a/tempest/tests/test_auth.py
+++ b/tempest/tests/test_auth.py
@@ -42,7 +42,8 @@
 
     def setUp(self):
         super(BaseAuthTestsSetUp, self).setUp()
-        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakeConfig)
+        self.useFixture(fake_config.ConfigFixture())
+        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.fake_http = fake_http.fake_httplib2(return_type=200)
         self.stubs.Set(http.ClosingHttp, 'request', self.fake_http.request)
         self.auth_provider = self._auth(self.credentials)
diff --git a/tempest/tests/test_decorators.py b/tempest/tests/test_decorators.py
index aa3c8fc..ebf0ca0 100644
--- a/tempest/tests/test_decorators.py
+++ b/tempest/tests/test_decorators.py
@@ -15,6 +15,9 @@
 
 import testtools
 
+from oslo.config import cfg
+
+from tempest import config
 from tempest import exceptions
 from tempest.openstack.common.fixture import mockpatch
 from tempest import test
@@ -25,7 +28,8 @@
 class BaseDecoratorsTest(base.TestCase):
     def setUp(self):
         super(BaseDecoratorsTest, self).setUp()
-        self.stubs.Set(test, 'CONF', fake_config.FakeConfig)
+        self.config_fixture = self.useFixture(fake_config.ConfigFixture())
+        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
 
 
 class TestAttrDecorator(BaseDecoratorsTest):
@@ -191,10 +195,8 @@
 class TestRequiresExtDecorator(BaseDecoratorsTest):
     def setUp(self):
         super(TestRequiresExtDecorator, self).setUp()
-        self.fixture = self.useFixture(mockpatch.PatchObject(
-                                       test.CONF.compute_feature_enabled,
-                                       'api_extensions',
-                                       new=['enabled_ext', 'another_ext']))
+        cfg.CONF.set_default('api_extensions', ['enabled_ext', 'another_ext'],
+                             'compute-feature-enabled')
 
     def _test_requires_ext_helper(self, expected_to_skip=True,
                                   **decorator_args):
@@ -220,7 +222,7 @@
 
     def test_requires_ext_decorator_with_all_ext_enabled(self):
         # disable fixture so the default (all) is used.
-        self.fixture.cleanUp()
+        self.config_fixture.cleanUp()
         self._test_requires_ext_helper(expected_to_skip=False,
                                        extension='random_ext',
                                        service='compute')
diff --git a/tempest/tests/test_rest_client.py b/tempest/tests/test_rest_client.py
index 827b5c9..4c23fbd 100644
--- a/tempest/tests/test_rest_client.py
+++ b/tempest/tests/test_rest_client.py
@@ -35,7 +35,8 @@
 
     def setUp(self):
         super(BaseRestClientTestClass, self).setUp()
-        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakeConfig)
+        self.useFixture(fake_config.ConfigFixture())
+        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.rest_client = rest_client.RestClient(
             fake_auth_provider.FakeAuthProvider())
         self.stubs.Set(httplib2.Http, 'request', self.fake_http.request)
@@ -254,7 +255,8 @@
 
     def setUp(self):
         super(TestRestClientErrorCheckerJSON, self).setUp()
-        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakeConfig)
+        self.useFixture(fake_config.ConfigFixture())
+        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.rest_client = rest_client.RestClient(
             fake_auth_provider.FakeAuthProvider())