diff --git a/tobiko/openstack/client.py b/tobiko/openstack/_client.py
similarity index 100%
rename from tobiko/openstack/client.py
rename to tobiko/openstack/_client.py
diff --git a/tobiko/openstack/heat/_client.py b/tobiko/openstack/heat/_client.py
index 3d0caaf4b..5d3814c6e 100644
--- a/tobiko/openstack/heat/_client.py
+++ b/tobiko/openstack/heat/_client.py
@@ -15,7 +15,7 @@ from __future__ import absolute_import
 
 from heatclient import client as heatclient
 
-from tobiko.openstack import client as _client
+from tobiko.openstack import _client
 
 
 class HeatClientFixture(_client.OpenstackClientFixture):
diff --git a/tobiko/openstack/neutron/__init__.py b/tobiko/openstack/neutron/__init__.py
index 5641bdaf1..0c5817d36 100644
--- a/tobiko/openstack/neutron/__init__.py
+++ b/tobiko/openstack/neutron/__init__.py
@@ -14,6 +14,14 @@
 from __future__ import absolute_import
 
 from tobiko.openstack.neutron import _client
+from tobiko.openstack.neutron import _extension
+
 
 get_neutron_client = _client.get_neutron_client
 NeutronClientFixture = _client.NeutronClientFixture
+
+get_networking_extensions = _extension.get_networking_extensions
+missing_networking_extensions = _extension.missing_networking_extensions
+has_networking_extensions = _extension.has_networking_extensions
+skip_if_missing_networking_extensions = (
+    _extension.skip_if_missing_networking_extensions)
diff --git a/tobiko/openstack/neutron/_client.py b/tobiko/openstack/neutron/_client.py
index 635f33098..61a730cbe 100644
--- a/tobiko/openstack/neutron/_client.py
+++ b/tobiko/openstack/neutron/_client.py
@@ -15,7 +15,7 @@ from __future__ import absolute_import
 
 from neutronclient.v2_0 import client as neutronclient
 
-from tobiko.openstack import client as _client
+from tobiko.openstack import _client
 
 
 class NeutronClientFixture(_client.OpenstackClientFixture):
diff --git a/tobiko/openstack/neutron/_extension.py b/tobiko/openstack/neutron/_extension.py
new file mode 100644
index 000000000..e7096ffc5
--- /dev/null
+++ b/tobiko/openstack/neutron/_extension.py
@@ -0,0 +1,58 @@
+# Copyright 2019 Red Hat
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+from __future__ import absolute_import
+
+import tobiko
+
+from tobiko.openstack.neutron import _client
+
+
+class NetworkingExtensionsFixture(tobiko.SharedFixture):
+
+    client = None
+    extensions = None
+
+    def setup_fixture(self):
+        self.setup_client()
+        self.get_networking_extensions()
+
+    def setup_client(self):
+        self.client = _client.get_neutron_client()
+
+    def get_networking_extensions(self):
+        extensions = self.client.list_extensions()['extensions']
+        self.extensions = frozenset(e['alias'] for e in extensions)
+
+
+def get_networking_extensions():
+    return tobiko.setup_fixture(NetworkingExtensionsFixture).extensions
+
+
+def missing_networking_extensions(*extensions):
+    return sorted(frozenset(extensions) - get_networking_extensions())
+
+
+def has_networking_extensions(*extensions):
+    return not missing_networking_extensions(*extensions)
+
+
+def skip_if_missing_networking_extensions(*extensions):
+    return tobiko.skip_if('missing networking extensions: {return_value!r}',
+                          missing_networking_extensions, *extensions)
+
+
+if __name__ == '__main__':
+    import sys
+    sys.stdout.write('\n'.join(sorted(get_networking_extensions())))
+    sys.stdout.flush()
diff --git a/tobiko/openstack/nova/_client.py b/tobiko/openstack/nova/_client.py
index 4c6278dec..291dad78e 100644
--- a/tobiko/openstack/nova/_client.py
+++ b/tobiko/openstack/nova/_client.py
@@ -15,7 +15,7 @@ from __future__ import absolute_import
 
 from novaclient import client as novaclient
 
-from tobiko.openstack import client as _client
+from tobiko.openstack import _client
 
 
 class NovaClientFixture(_client.OpenstackClientFixture):
diff --git a/tobiko/tests/openstack/base.py b/tobiko/tests/openstack/base.py
index 441503f04..c41d36577 100644
--- a/tobiko/tests/openstack/base.py
+++ b/tobiko/tests/openstack/base.py
@@ -18,7 +18,6 @@ import mock
 
 from tobiko.config import CONF
 from tobiko.openstack import keystone
-from tobiko.openstack import heat
 from tobiko.tests import unit
 
 
@@ -38,4 +37,17 @@ class OpenstackTest(unit.TobikoUnitTest):
     def patch_get_heat_client(self, *args, **kwargs):
         from heatclient import client
         kwargs.setdefault('return_value', mock.MagicMock(specs=client.Client))
-        return self.patch_object(heat, 'get_heat_client', *args, **kwargs)
+        get_heat_client = self.patch(
+            'tobiko.openstack.heat._client.get_heat_client', *args, **kwargs)
+        self.patch('tobiko.openstack.heat.get_heat_client', get_heat_client)
+        return get_heat_client
+
+    def patch_get_neutron_client(self, *args, **kwargs):
+        from neutronclient.v2_0 import client
+        kwargs.setdefault('return_value', mock.MagicMock(specs=client.Client))
+        get_neutron_client = self.patch(
+            'tobiko.openstack.neutron._client.get_neutron_client', *args,
+            **kwargs)
+        self.patch('tobiko.openstack.neutron.get_neutron_client',
+                   get_neutron_client)
+        return get_neutron_client
diff --git a/tobiko/tests/openstack/neutron/test_extension.py b/tobiko/tests/openstack/neutron/test_extension.py
new file mode 100644
index 000000000..45d345c0b
--- /dev/null
+++ b/tobiko/tests/openstack/neutron/test_extension.py
@@ -0,0 +1,61 @@
+# Copyright 2019 Red Hat
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+from __future__ import absolute_import
+
+from tobiko.openstack import neutron
+from tobiko.tests.openstack import base
+
+
+class NeutronExtensionTest(base.OpenstackTest):
+
+    extensions = ['ext-1', 'ext-2', 'ext-3']
+
+    def setUp(self):
+        super(NeutronExtensionTest, self).setUp()
+        self.client = self.patch_get_neutron_client().return_value
+        self.client.list_extensions.return_value = {
+            'extensions': [{'alias': e} for e in self.extensions]}
+
+    def test_get_networking_extensions(self):
+        result = neutron.get_networking_extensions()
+        self.assertEqual(frozenset(self.extensions), result)
+
+    def test_missing_networking_extensions(self):
+        result = neutron.missing_networking_extensions(
+            'ext-2', 'ext-4', 'ext-0')
+        self.assertEqual(['ext-0', 'ext-4'], result)
+
+    def test_has_networking_extensions(self):
+        self.assertTrue(neutron.has_networking_extensions(*self.extensions))
+        self.assertFalse(neutron.has_networking_extensions('ext-1', 'ext-4'))
+
+    def test_skip_if_networking_extensions_when_missing(self):
+        ex = self.assertRaises(
+            self.skipException,
+            self._test_skip_if_networking_extensions_when_missing)
+        self.assertEqual("missing networking extensions: ['ext-4']", str(ex))
+
+    @neutron.skip_if_missing_networking_extensions('ext-1', 'ext-4')
+    def _test_skip_if_networking_extensions_when_missing(self):
+        self.fail('Not skipped')
+
+    def test_skip_if_networking_extensions_when_not_missing(self):
+        ex = self.assertRaises(
+            self.failureException,
+            self._test_skip_if_networking_extensions_when_not_missing)
+        self.assertEqual('OK', str(ex))
+
+    @neutron.skip_if_missing_networking_extensions('ext-1', 'ext-2')
+    def _test_skip_if_networking_extensions_when_not_missing(self):
+        self.fail('OK')
diff --git a/tobiko/tests/openstack/test_client.py b/tobiko/tests/openstack/test_client.py
index 0479004bb..9ba8713ea 100644
--- a/tobiko/tests/openstack/test_client.py
+++ b/tobiko/tests/openstack/test_client.py
@@ -19,7 +19,7 @@ import inspect
 import mock
 
 import tobiko
-from tobiko.openstack import client as _client
+from tobiko.openstack import _client
 from tobiko.openstack import keystone
 from tobiko.tests.openstack import base