diff --git a/tests/utils.py b/tests/utils.py
index 264acebd8..e6b40e823 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -1,5 +1,6 @@
 import time
 
+import mock
 import mox
 import requests
 import testtools
@@ -72,9 +73,12 @@ class TestCase(testtools.TestCase):
     def setUp(self):
         super(TestCase, self).setUp()
         self.mox = mox.Mox()
-        self._original_time = time.time
-        time.time = lambda: 1234
-        requests.request = self.mox.CreateMockAnything()
+        self.request_patcher = mock.patch.object(requests, 'request',
+                                                 self.mox.CreateMockAnything())
+        self.time_patcher = mock.patch.object(time, 'time',
+                                              lambda: 1234)
+        self.request_patcher.start()
+        self.time_patcher.start()
         self.client = client.Client(username=self.TEST_USER,
                                     token=self.TEST_TOKEN,
                                     tenant_name=self.TEST_TENANT_NAME,
@@ -82,7 +86,8 @@ class TestCase(testtools.TestCase):
                                     endpoint=self.TEST_URL)
 
     def tearDown(self):
-        time.time = self._original_time
+        self.request_patcher.stop()
+        self.time_patcher.stop()
         self.mox.UnsetStubs()
         self.mox.VerifyAll()
         super(TestCase, self).tearDown()
@@ -101,12 +106,16 @@ class UnauthenticatedTestCase(testtools.TestCase):
     def setUp(self):
         super(UnauthenticatedTestCase, self).setUp()
         self.mox = mox.Mox()
-        self._original_time = time.time
-        time.time = lambda: 1234
-        requests.request = self.mox.CreateMockAnything()
+        self.request_patcher = mock.patch.object(requests, 'request',
+                                                 self.mox.CreateMockAnything())
+        self.time_patcher = mock.patch.object(time, 'time',
+                                              lambda: 1234)
+        self.request_patcher.start()
+        self.time_patcher.start()
 
     def tearDown(self):
-        time.time = self._original_time
+        self.request_patcher.stop()
+        self.time_patcher.stop()
         self.mox.UnsetStubs()
         self.mox.VerifyAll()
         super(UnauthenticatedTestCase, self).tearDown()
diff --git a/tests/v3/utils.py b/tests/v3/utils.py
index b3b359c4d..13f7eda23 100644
--- a/tests/v3/utils.py
+++ b/tests/v3/utils.py
@@ -4,6 +4,7 @@ import time
 import urlparse
 import uuid
 
+import mock
 import mox
 import requests
 import testtools
@@ -127,9 +128,12 @@ class TestCase(testtools.TestCase):
     def setUp(self):
         super(TestCase, self).setUp()
         self.mox = mox.Mox()
-        self._original_time = time.time
-        time.time = lambda: 1234
-        requests.request = self.mox.CreateMockAnything()
+        self.request_patcher = mock.patch.object(requests, 'request',
+                                                 self.mox.CreateMockAnything())
+        self.time_patcher = mock.patch.object(time, 'time',
+                                              lambda: 1234)
+        self.request_patcher.start()
+        self.time_patcher.start()
         self.client = TestClient(username=self.TEST_USER,
                                  token=self.TEST_TOKEN,
                                  tenant_name=self.TEST_TENANT_NAME,
@@ -137,7 +141,8 @@ class TestCase(testtools.TestCase):
                                  endpoint=self.TEST_URL)
 
     def tearDown(self):
-        time.time = self._original_time
+        self.request_patcher.stop()
+        self.time_patcher.stop()
         self.mox.UnsetStubs()
         self.mox.VerifyAll()
         super(TestCase, self).tearDown()
@@ -156,12 +161,16 @@ class UnauthenticatedTestCase(testtools.TestCase):
     def setUp(self):
         super(UnauthenticatedTestCase, self).setUp()
         self.mox = mox.Mox()
-        self._original_time = time.time
-        time.time = lambda: 1234
-        requests.request = self.mox.CreateMockAnything()
+
+        self.request_patcher = mock.patch.object(requests, 'request',
+                                                 self.mox.CreateMockAnything())
+        self.time_patcher = mock.patch.object(time, 'time',
+                                              lambda: 1234)
+        self.request_patcher.start()
 
     def tearDown(self):
-        time.time = self._original_time
+        self.request_patcher.stop()
+        self.time_patcher.stop()
         self.mox.UnsetStubs()
         self.mox.VerifyAll()
         super(UnauthenticatedTestCase, self).tearDown()