diff --git a/kuryr_tempest_plugin/tests/scenario/test_port_pool.py b/kuryr_tempest_plugin/tests/scenario/test_port_pool.py
index d7cc2fcb..1f4e7c6e 100644
--- a/kuryr_tempest_plugin/tests/scenario/test_port_pool.py
+++ b/kuryr_tempest_plugin/tests/scenario/test_port_pool.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from oslo_concurrency import lockutils
 from oslo_log import log as logging
 from tempest import config
 from tempest.lib import decorators
@@ -42,6 +43,7 @@ class TestPortPoolScenario(base.BaseKuryrScenarioTest):
         return subnet_id
 
     @decorators.idempotent_id('bddf5441-1244-449d-a125-b5fddfb1a3aa')
+    @lockutils.synchronized('port-pool-restarts')
     def test_port_pool(self):
         namespace_name, namespace = self.create_namespace()
         self.addCleanup(self.delete_namespace, namespace_name)
@@ -98,6 +100,7 @@ class TestPortPoolScenario(base.BaseKuryrScenarioTest):
             pod_name3, cmd, namespace=namespace_name), '0')
 
     @decorators.idempotent_id('bddd5441-1244-429d-a125-b55ddfb134a9')
+    @lockutils.synchronized('port-pool-restarts')
     def test_port_pool_update(self):
         UPDATED_POOL_BATCH = 5
         CONFIG_MAP_NAME = 'kuryr-config'
diff --git a/requirements.txt b/requirements.txt
index 5acbb16f..021fa628 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,3 +12,4 @@ testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 kubernetes>=5.0.0 # Apache-2.0
 openshift>=0.7.0
+oslo.concurrency>=3.26.0 # Apache-2.0