diff --git a/ubuntutools/test/test_config.py b/ubuntutools/test/test_config.py
index 68d5fa7..a48902f 100644
--- a/ubuntutools/test/test_config.py
+++ b/ubuntutools/test/test_config.py
@@ -51,7 +51,7 @@ class ConfigTestCase(unittest.TestCase):
         m.side_effect = self._fake_open
         patcher = mock.patch('__builtin__.open', m)
         self.addCleanup(patcher.stop)
-        self.MockOpen = self.patcher.start()
+        patcher.start()
         
         Logger.stdout = StringIO()
         Logger.stderr = StringIO()
diff --git a/ubuntutools/test/test_update_maintainer.py b/ubuntutools/test/test_update_maintainer.py
index 808e609..40be54a 100644
--- a/ubuntutools/test/test_update_maintainer.py
+++ b/ubuntutools/test/test_update_maintainer.py
@@ -220,11 +220,11 @@ class UpdateMaintainerTestCase(unittest.TestCase):
         m.side_effect = self._fake_open
         patcher = mock.patch('__builtin__.open', m)
         self.addCleanup(patcher.stop)
-        self.MockOpen = patcher.start()
+        patcher.start()
         m = mock.MagicMock(side_effect=self._fake_isfile)
         patcher = mock.patch('os.path.isfile', m)
         self.addCleanup(patcher.stop)
-        self.MockIsfile = patcher.start()
+        patcher.start()
         self._files["rules"] = StringIO.StringIO(_SIMPLE_RULES)
         Logger.stdout = StringIO.StringIO()
         Logger.stderr = StringIO.StringIO()