diff --git a/neutron/tests/unit/ml2/test_rpcapi.py b/neutron/tests/unit/ml2/test_rpcapi.py
index 0f4a858b72..a2d3bf0eb5 100644
--- a/neutron/tests/unit/ml2/test_rpcapi.py
+++ b/neutron/tests/unit/ml2/test_rpcapi.py
@@ -38,11 +38,9 @@ class RpcApiTestCase(base.BaseTestCase):
         if rpc_method == 'cast' and method == 'run_instance':
             kwargs['call'] = False
 
-        rpc_method_mock = mock.Mock()
-        rpc_method_mock.return_value = expected_retval
-        setattr(rpc, rpc_method, rpc_method_mock)
-
-        retval = getattr(rpcapi, method)(ctxt, **kwargs)
+        with mock.patch.object(rpc, rpc_method) as rpc_method_mock:
+            rpc_method_mock.return_value = expected_retval
+            retval = getattr(rpcapi, method)(ctxt, **kwargs)
 
         self.assertEqual(retval, expected_retval)
 
diff --git a/neutron/tests/unit/test_l3_plugin.py b/neutron/tests/unit/test_l3_plugin.py
index e4d28513cf..c138a7875c 100644
--- a/neutron/tests/unit/test_l3_plugin.py
+++ b/neutron/tests/unit/test_l3_plugin.py
@@ -1880,9 +1880,8 @@ class L3BaseForIntTests(test_db_plugin.NeutronDbPluginV2TestCase):
         ext_mgr = ext_mgr or L3TestExtensionManager()
 
         if self.mock_rescheduling:
-            rescheduling_patcher = mock.patch(
-                '%s._check_router_needs_rescheduling' % plugin)
-            rescheduling_patcher.start().return_value = False
+            mock.patch('%s._check_router_needs_rescheduling' % plugin,
+                       new=lambda *a: False).start()
 
         super(L3BaseForIntTests, self).setUp(plugin=plugin, ext_mgr=ext_mgr,
                                              service_plugins=service_plugins)