diff --git a/doc/requirements.txt b/doc/requirements.txt
index a475cfa..2d407c4 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,7 +7,6 @@
 # be installed in a specific order.
 #
 # Requirements for docs
-mock>=2.0.0 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
 reno>=3.1.0 # Apache-2.0
 sphinx>=2.0.0,!=2.1.0 # BSD
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 4f8fb70..fdcd89c 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -41,7 +41,6 @@ keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==1.4
 msgpack==0.5.6
 munch==2.2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 7eac734..fa1456d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,5 +10,4 @@
 hacking>=1.1.0,<1.2.0 # Apache-2.0
 #
 coverage!=4.4,>=4.0 # Apache-2.0
-mock>=2.0.0 # BSD
 testtools>=2.2.0 # MIT
diff --git a/zaqar_ui/test/api_tests/test_rest_api.py b/zaqar_ui/test/api_tests/test_rest_api.py
index bbda6e7..3aed023 100644
--- a/zaqar_ui/test/api_tests/test_rest_api.py
+++ b/zaqar_ui/test/api_tests/test_rest_api.py
@@ -10,7 +10,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from openstack_dashboard.test import helpers as test
 from openstack_dashboard.test.test_data import utils
diff --git a/zaqar_ui/test/helpers.py b/zaqar_ui/test/helpers.py
index eb899c0..8b95a09 100644
--- a/zaqar_ui/test/helpers.py
+++ b/zaqar_ui/test/helpers.py
@@ -10,7 +10,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from openstack_dashboard.test import helpers
 from zaqarclient.queues.v2 import client as zaqar_client