diff --git a/lower-constraints.txt b/lower-constraints.txt
index 93e16e1..f6de0c1 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -57,7 +57,6 @@ Mako==1.0.7
 MarkupSafe==1.1.0
 mccabe==0.5.3
 microversion-parse==0.2.1
-mock==2.0.0
 monotonic==1.5
 mox3==0.26.0
 msgpack==0.6.1
diff --git a/sahara_plugin_spark/tests/unit/plugins/spark/test_config_helper.py b/sahara_plugin_spark/tests/unit/plugins/spark/test_config_helper.py
index 6c07f56..dae4dd4 100644
--- a/sahara_plugin_spark/tests/unit/plugins/spark/test_config_helper.py
+++ b/sahara_plugin_spark/tests/unit/plugins/spark/test_config_helper.py
@@ -16,7 +16,7 @@
 import copy
 import xml.dom.minidom as xml
 
-import mock
+from unittest import mock
 
 from sahara.plugins import swift_helper as swift
 from sahara.plugins import utils
diff --git a/sahara_plugin_spark/tests/unit/plugins/spark/test_plugin.py b/sahara_plugin_spark/tests/unit/plugins/spark/test_plugin.py
index 0f99176..c6971e3 100644
--- a/sahara_plugin_spark/tests/unit/plugins/spark/test_plugin.py
+++ b/sahara_plugin_spark/tests/unit/plugins/spark/test_plugin.py
@@ -13,7 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
+
 import testtools
 
 from sahara.plugins import base as pb
diff --git a/test-requirements.txt b/test-requirements.txt
index 9b3eb86..f3621b2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,7 +9,6 @@ bashate>=0.5.1 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 pylint==1.4.5 # GPLv2