diff --git a/neutron/pecan_wsgi/hooks/policy_enforcement.py b/neutron/pecan_wsgi/hooks/policy_enforcement.py
index 20aa758ebab..fd9ffd71a00 100644
--- a/neutron/pecan_wsgi/hooks/policy_enforcement.py
+++ b/neutron/pecan_wsgi/hooks/policy_enforcement.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import copy
-
 from neutron_lib import constants as const
 from oslo_log import log as logging
 from oslo_policy import policy as oslo_policy
@@ -118,8 +116,7 @@ class PolicyHook(hooks.PecanHook):
                                           parent_id=parent_id)
             if resource_obj:
                 original_resources.append(resource_obj)
-                obj = copy.copy(resource_obj)
-                obj.update(item)
+                obj = resource_obj | item
                 obj[const.ATTRIBUTES_TO_UPDATE] = list(item)
                 # Put back the item in the list so that policies could be
                 # enforced
diff --git a/neutron/tests/unit/agent/l3/test_agent.py b/neutron/tests/unit/agent/l3/test_agent.py
index 0d51040a86e..e874e7d195f 100644
--- a/neutron/tests/unit/agent/l3/test_agent.py
+++ b/neutron/tests/unit/agent/l3/test_agent.py
@@ -2272,9 +2272,8 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
         fip1 = {'id': _uuid(), 'floating_ip_address': '8.8.8.8',
                 'fixed_ip_address': '7.7.7.7', 'status': 'ACTIVE',
                 'port_id': router[lib_constants.INTERFACE_KEY][0]['id']}
-        fip2 = copy.copy(fip1)
-        fip2.update({'id': _uuid(), 'status': 'DOWN',
-                     'floating_ip_address': '9.9.9.9'})
+        fip2 = fip1 | {'id': _uuid(), 'status': 'DOWN',
+                       'floating_ip_address': '9.9.9.9'}
         router[lib_constants.FLOATINGIP_KEY] = [fip1, fip2]
 
         ri = legacy_router.LegacyRouter(agent, router['id'], router,
@@ -2350,8 +2349,7 @@ class TestBasicRouterOperations(BasicRouterOperationsFramework):
         fip1 = {'id': _uuid(), 'floating_ip_address': '8.8.8.8',
                 'fixed_ip_address': '7.7.7.7', 'status': 'ACTIVE',
                 'port_id': router[lib_constants.INTERFACE_KEY][0]['id']}
-        fip2 = copy.copy(fip1)
-        fip2.update({'id': _uuid(), 'status': 'DOWN', })
+        fip2 = fip1 | {'id': _uuid(), 'status': 'DOWN', }
         router[lib_constants.FLOATINGIP_KEY] = [fip1, fip2]
 
         ri = legacy_router.LegacyRouter(agent, router['id'], router,
diff --git a/neutron/tests/unit/objects/test_base.py b/neutron/tests/unit/objects/test_base.py
index 7e5ddda033f..567bf85aa7b 100644
--- a/neutron/tests/unit/objects/test_base.py
+++ b/neutron/tests/unit/objects/test_base.py
@@ -887,9 +887,7 @@ class BaseObjectIfaceTestCase(_BaseObjectTestCase, test_base.BaseTestCase):
                           'found in test class %r' %
                           self._test_class)
 
-        filters = copy.copy(self.valid_field_filter)
-        filters[synthetic_fields.pop()] = 'xxx'
-
+        filters = self.valid_field_filter | {synthetic_fields.pop(): 'xxx'}
         with mock.patch.object(obj_db_api, 'get_objects',
                                return_value=self.db_objs):
             self.assertRaises(n_exc.InvalidInput,
diff --git a/neutron/tests/unit/services/ovn_l3/test_plugin.py b/neutron/tests/unit/services/ovn_l3/test_plugin.py
index 19e52b89356..66e522d8401 100644
--- a/neutron/tests/unit/services/ovn_l3/test_plugin.py
+++ b/neutron/tests/unit/services/ovn_l3/test_plugin.py
@@ -866,12 +866,19 @@ class TestOVNL3RouterPlugin(test_mech_driver.Ml2PluginV2TestCase):
                                'cidr': '192.168.2.0/24',
                                'gateway_ip': '192.168.2.254'}
         # Old gateway info with same network and different subnet
-        self.get_router.return_value = copy.copy(self.fake_router_with_ext_gw)
-        self.get_router.return_value['external_gateway_info'] = {
-            'network_id': 'ext-network-id',
-            'external_fixed_ips': [{'ip_address': '192.168.2.1',
-                                    'subnet_id': 'old-ext-subnet-id'}]}
-        self.get_router.return_value['gw_port_id'] = 'old-gw-port-id'
+        self.get_router.return_value = (
+            self.fake_router_with_ext_gw |
+            {
+                'external_gateway_info': {
+                    'network_id': 'ext-network-id',
+                    'external_fixed_ips': [
+                        {'ip_address': '192.168.2.1',
+                         'subnet_id': 'old-ext-subnet-id'}
+                    ]
+                },
+                'gw_port_id': 'old-gw-port-id'
+            }
+        )
         ur.return_value = self.fake_router_with_ext_gw
         self.get_subnet.side_effect = lambda ctx, sid: {
             'ext-subnet-id': self.fake_ext_subnet,