diff --git a/designateclient/tests/test_utils.py b/designateclient/tests/test_utils.py
index 359d0e19..66261318 100644
--- a/designateclient/tests/test_utils.py
+++ b/designateclient/tests/test_utils.py
@@ -11,11 +11,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
 import uuid
 
-import mock
-
-
 from designateclient import exceptions
 from designateclient.tests import base
 from designateclient import utils
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 2cac8e07..5bd1e9bb 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -26,7 +26,6 @@ jsonschema==2.6.0
 keystoneauth1==3.4.0
 linecache2==1.0.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==0.6
 mox3==0.20.0
 msgpack-python==0.4.0
diff --git a/test-requirements.txt b/test-requirements.txt
index ea0363e5..4cb52f9e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,6 @@
 # Hacking already pins down pep8, pyflakes and flake8
 hacking>=1.1.0,<1.2.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
-mock>=2.0.0 # BSD
 oslo.config>=5.2.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 os-testr>=1.0.0 # Apache-2.0