diff --git a/tempest/common/glance_http.py b/tempest/common/glance_http.py
index 4be3da1..868a3e9 100644
--- a/tempest/common/glance_http.py
+++ b/tempest/common/glance_http.py
@@ -330,7 +330,7 @@
             try:
                 self.context.load_verify_locations(self.ca_certs)
             except Exception as e:
-                msg = 'Unable to load CA from "%s"' % (self.ca_certs, e)
+                msg = 'Unable to load CA from "%s" %s' % (self.ca_certs, e)
                 raise exc.SSLConfigurationError(msg)
         else:
             self.context.set_default_verify_paths()
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 24a73fc..da4ebbe 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -96,7 +96,7 @@
 
     def addCleanup_with_wait(self, waiter_callable, thing_id, thing_id_param,
                              cleanup_callable, cleanup_args=None,
-                             cleanup_kwargs=None, ignore_error=True):
+                             cleanup_kwargs=None):
         """Adds wait for async resource deletion at the end of cleanups
 
         @param waiter_callable: callable to wait for the resource to delete
diff --git a/tempest/tests/services/compute/test_extensions_client.py b/tempest/tests/services/compute/test_extensions_client.py
new file mode 100644
index 0000000..aa46efa
--- /dev/null
+++ b/tempest/tests/services/compute/test_extensions_client.py
@@ -0,0 +1,75 @@
+# Copyright 2015 NEC Corporation.  All rights reserved.
+#
+#    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.
+
+import httplib2
+
+from oslo_serialization import jsonutils as json
+from oslotest import mockpatch
+
+from tempest.services.compute.json import extensions_client
+from tempest.tests import base
+from tempest.tests import fake_auth_provider
+
+
+class TestExtensionsClient(base.TestCase):
+
+    def setUp(self):
+        super(TestExtensionsClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = extensions_client.ExtensionsClient(
+            fake_auth, 'compute', 'regionOne')
+
+    def _test_list_extensions(self, bytes_body=False):
+        body = '{"extensions": []}'
+        if bytes_body:
+            body = body.encode('utf-8')
+        expected = []
+        response = (httplib2.Response({'status': 200}), body)
+        self.useFixture(mockpatch.Patch(
+            'tempest.common.service_client.ServiceClient.get',
+            return_value=response))
+        self.assertEqual(expected, self.client.list_extensions())
+
+    def test_list_extensions_with_str_body(self):
+        self._test_list_extensions()
+
+    def test_list_extensions_with_bytes_body(self):
+        self._test_list_extensions(bytes_body=True)
+
+    def _test_show_extension(self, bytes_body=False):
+        expected = {
+            "updated": "2011-06-09T00:00:00Z",
+            "name": "Multinic",
+            "links": [],
+            "namespace":
+            "http://docs.openstack.org/compute/ext/multinic/api/v1.1",
+            "alias": "NMN",
+            "description": u'\u2740(*\xb4\u25e1`*)\u2740'
+        }
+        serialized_body = json.dumps({"extension": expected})
+        if bytes_body:
+            serialized_body = serialized_body.encode('utf-8')
+
+        mocked_resp = (httplib2.Response({'status': 200}), serialized_body)
+        self.useFixture(mockpatch.Patch(
+            'tempest.common.service_client.ServiceClient.get',
+            return_value=mocked_resp))
+        resp = self.client.show_extension("NMN")
+        self.assertEqual(expected, resp)
+
+    def test_show_extension_with_str_body(self):
+        self._test_show_extension()
+
+    def test_show_extension_with_bytes_body(self):
+        self._test_show_extension(bytes_body=True)