diff --git a/kuryr_libnetwork/tests/unit/base.py b/kuryr_libnetwork/tests/unit/base.py
index fcd6332b..fdd68df0 100644
--- a/kuryr_libnetwork/tests/unit/base.py
+++ b/kuryr_libnetwork/tests/unit/base.py
@@ -10,8 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
 import netaddr
+from unittest import mock
 
 from neutronclient.v2_0 import client
 from oslotest import base
diff --git a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_nested.py b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_nested.py
index 6e340cc5..d1c15c92 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_nested.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_nested.py
@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding
diff --git a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_sriov.py b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_sriov.py
index 766db323..72018817 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_sriov.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_sriov.py
@@ -11,8 +11,8 @@
 # under the License.
 
 import glob
-import mock
 import os
+from unittest import mock
 
 from oslo_utils import uuidutils
 
diff --git a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_veth.py b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_veth.py
index cd7973c3..b9d02ba9 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_veth.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_veth.py
@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding
diff --git a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_vlan.py b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_vlan.py
index ac4b9a30..19c47761 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/drivers/test_vlan.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/drivers/test_vlan.py
@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding
diff --git a/kuryr_libnetwork/tests/unit/port_driver/test_base.py b/kuryr_libnetwork/tests/unit/port_driver/test_base.py
index 07c0cfec..7f3c01b5 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/test_base.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/test_base.py
@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 
 from kuryr.lib import exceptions
 from kuryr_libnetwork.port_driver import base as d_base
diff --git a/kuryr_libnetwork/tests/unit/port_driver/test_driver.py b/kuryr_libnetwork/tests/unit/port_driver/test_driver.py
index 79905ead..24eecee8 100644
--- a/kuryr_libnetwork/tests/unit/port_driver/test_driver.py
+++ b/kuryr_libnetwork/tests/unit/port_driver/test_driver.py
@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 
 from oslo_utils import importutils
 
diff --git a/kuryr_libnetwork/tests/unit/test_config.py b/kuryr_libnetwork/tests/unit/test_config.py
index ba4d4e42..75602a4d 100644
--- a/kuryr_libnetwork/tests/unit/test_config.py
+++ b/kuryr_libnetwork/tests/unit/test_config.py
@@ -10,8 +10,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 import os
 from six.moves.urllib import parse
 import sys
diff --git a/kuryr_libnetwork/tests/unit/test_external_connectivity.py b/kuryr_libnetwork/tests/unit/test_external_connectivity.py
index f9059251..90de84f0 100644
--- a/kuryr_libnetwork/tests/unit/test_external_connectivity.py
+++ b/kuryr_libnetwork/tests/unit/test_external_connectivity.py
@@ -12,8 +12,8 @@
 
 from collections import defaultdict
 from itertools import groupby
-import mock
 from operator import itemgetter
+from unittest import mock
 
 import ddt
 from oslo_serialization import jsonutils
diff --git a/kuryr_libnetwork/tests/unit/test_ipam_pool.py b/kuryr_libnetwork/tests/unit/test_ipam_pool.py
index dc90776c..b3fc5665 100644
--- a/kuryr_libnetwork/tests/unit/test_ipam_pool.py
+++ b/kuryr_libnetwork/tests/unit/test_ipam_pool.py
@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions
 from oslo_serialization import jsonutils
 
diff --git a/kuryr_libnetwork/tests/unit/test_kuryr.py b/kuryr_libnetwork/tests/unit/test_kuryr.py
index b9c03aff..ac338cd0 100644
--- a/kuryr_libnetwork/tests/unit/test_kuryr.py
+++ b/kuryr_libnetwork/tests/unit/test_kuryr.py
@@ -9,7 +9,7 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-import mock
+from unittest import mock
 
 import ddt
 from oslo_serialization import jsonutils
diff --git a/kuryr_libnetwork/tests/unit/test_kuryr_endpoint.py b/kuryr_libnetwork/tests/unit/test_kuryr_endpoint.py
index d2ceb9f1..af519058 100644
--- a/kuryr_libnetwork/tests/unit/test_kuryr_endpoint.py
+++ b/kuryr_libnetwork/tests/unit/test_kuryr_endpoint.py
@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions as n_exceptions
 from oslo_concurrency import processutils
 from oslo_serialization import jsonutils
diff --git a/kuryr_libnetwork/tests/unit/test_kuryr_existing_network.py b/kuryr_libnetwork/tests/unit/test_kuryr_existing_network.py
index dd916f9a..bf6a0349 100644
--- a/kuryr_libnetwork/tests/unit/test_kuryr_existing_network.py
+++ b/kuryr_libnetwork/tests/unit/test_kuryr_existing_network.py
@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions as n_exceptions
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
diff --git a/kuryr_libnetwork/tests/unit/test_kuryr_ipam.py b/kuryr_libnetwork/tests/unit/test_kuryr_ipam.py
index da600931..82316021 100644
--- a/kuryr_libnetwork/tests/unit/test_kuryr_ipam.py
+++ b/kuryr_libnetwork/tests/unit/test_kuryr_ipam.py
@@ -11,10 +11,11 @@
 # under the License.
 
 import ipaddress
+from unittest import mock
+
 import six
 
 import ddt
-import mock
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
 from werkzeug import exceptions as w_exceptions
diff --git a/kuryr_libnetwork/tests/unit/test_kuryr_network.py b/kuryr_libnetwork/tests/unit/test_kuryr_network.py
index 2b81a427..3187b5f6 100644
--- a/kuryr_libnetwork/tests/unit/test_kuryr_network.py
+++ b/kuryr_libnetwork/tests/unit/test_kuryr_network.py
@@ -10,9 +10,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 from ddt import data
 from ddt import ddt
-import mock
 from neutronclient.common import exceptions
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils