diff --git a/os_collect_config/tests/test_collect.py b/os_collect_config/tests/test_collect.py
index 3b09425..9c87ec8 100644
--- a/os_collect_config/tests/test_collect.py
+++ b/os_collect_config/tests/test_collect.py
@@ -19,10 +19,10 @@ import os
 import signal
 import sys
 import tempfile
+from unittest import mock
 
 import extras
 import fixtures
-import mock
 from oslo_config import cfg
 import testtools
 from testtools import matchers
diff --git a/os_collect_config/tests/test_config_drive.py b/os_collect_config/tests/test_config_drive.py
index ddc9239..f8b8def 100644
--- a/os_collect_config/tests/test_config_drive.py
+++ b/os_collect_config/tests/test_config_drive.py
@@ -14,9 +14,9 @@
 import json
 import os
 import subprocess
+from unittest import mock
 
 import fixtures
-import mock
 import testtools
 
 from os_collect_config import config_drive
diff --git a/os_collect_config/tests/test_ec2.py b/os_collect_config/tests/test_ec2.py
index 8ff7c58..770ec3a 100644
--- a/os_collect_config/tests/test_ec2.py
+++ b/os_collect_config/tests/test_ec2.py
@@ -15,10 +15,10 @@
 
 import json
 import os
+from unittest import mock
 import uuid
 
 import fixtures
-import mock
 from oslo_config import cfg
 import requests
 import six.moves.urllib.parse as urlparse
diff --git a/os_collect_config/tests/test_zaqar.py b/os_collect_config/tests/test_zaqar.py
index a07d805..5c6bc59 100644
--- a/os_collect_config/tests/test_zaqar.py
+++ b/os_collect_config/tests/test_zaqar.py
@@ -13,10 +13,10 @@
 # limitations under the License.
 
 import json
+from unittest import mock
 
 import fixtures
 from keystoneclient import discover as ks_discover
-import mock
 from oslo_config import cfg
 from oslo_config import fixture as config_fixture
 import testtools
diff --git a/test-requirements.txt b/test-requirements.txt
index 91b6abf..1cb1476 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,6 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2 # BSD
 stestr>=2.0.0 # Apache-2.0