diff --git a/openstack_requirements/tests/test_check_constraints.py b/openstack_requirements/tests/test_check_constraints.py
index 535ca49fa9..4a0e7f24be 100644
--- a/openstack_requirements/tests/test_check_constraints.py
+++ b/openstack_requirements/tests/test_check_constraints.py
@@ -11,8 +11,9 @@
 # under the License.
 
 import io
-import mock
 import os
+from unittest import mock
+
 import testscenarios
 import testtools
 
diff --git a/openstack_requirements/tests/test_update.py b/openstack_requirements/tests/test_update.py
index 9cc94a590d..b3e95a9e1c 100644
--- a/openstack_requirements/tests/test_update.py
+++ b/openstack_requirements/tests/test_update.py
@@ -15,9 +15,9 @@
 import six
 import sys
 import textwrap
+from unittest import mock
 
 import fixtures
-import mock
 import testscenarios
 import testtools
 from testtools import matchers
diff --git a/test-requirements.txt b/test-requirements.txt
index 2e078495fb..3239557c05 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,5 +8,4 @@ testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 virtualenv>=14.0.6 # MIT
 setuptools!=24.0.0,!=34.0.0,!=34.0.1,!=34.0.2,!=34.0.3,!=34.1.0,!=34.1.1,!=34.2.0,!=34.3.0,!=34.3.1,!=34.3.2,!=36.2.0,>=21.0.0 # PSF/ZPL
-mock>=2.0.0 # BSD
 bashate>=0.5.1 # Apache-2.0