diff --git a/ospurge/tests/__init__.py b/ospurge/tests/__init__.py
index e69de29..a959d58 100644
--- a/ospurge/tests/__init__.py
+++ b/ospurge/tests/__init__.py
@@ -0,0 +1,9 @@
+try:
+    from unittest import mock   # Python 3.3+
+except ImportError:
+    import mock  # noqa: Python 2.7
+
+try:
+    import unittest2 as unittest   # Python 2.7
+except ImportError:
+    import unittest   # noqa
diff --git a/ospurge/tests/resources/test_base.py b/ospurge/tests/resources/test_base.py
index 8b97268..5299d73 100644
--- a/ospurge/tests/resources/test_base.py
+++ b/ospurge/tests/resources/test_base.py
@@ -13,11 +13,11 @@ import time
 from typing import Any
 from typing import Dict
 from typing import Iterable
-import unittest
-from unittest import mock
 
 from ospurge import exceptions
 from ospurge.resources import base
+from ospurge.tests import mock
+from ospurge.tests import unittest
 
 
 def generate_timeout_series(timeout):
diff --git a/ospurge/tests/resources/test_cinder.py b/ospurge/tests/resources/test_cinder.py
index 6a4ad0f..1a36495 100644
--- a/ospurge/tests/resources/test_cinder.py
+++ b/ospurge/tests/resources/test_cinder.py
@@ -10,11 +10,11 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources import cinder
+from ospurge.tests import mock
 
 
 class TestBackups(unittest.TestCase):
diff --git a/ospurge/tests/resources/test_glance.py b/ospurge/tests/resources/test_glance.py
index 6d40570..504fc11 100644
--- a/ospurge/tests/resources/test_glance.py
+++ b/ospurge/tests/resources/test_glance.py
@@ -10,11 +10,11 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources import glance
+from ospurge.tests import mock
 
 
 class TestListImagesMixin(unittest.TestCase):
diff --git a/ospurge/tests/resources/test_neutron.py b/ospurge/tests/resources/test_neutron.py
index ba600ab..97df11d 100644
--- a/ospurge/tests/resources/test_neutron.py
+++ b/ospurge/tests/resources/test_neutron.py
@@ -10,11 +10,11 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources import neutron
+from ospurge.tests import mock
 
 
 class TestFloatingIPs(unittest.TestCase):
diff --git a/ospurge/tests/resources/test_nova.py b/ospurge/tests/resources/test_nova.py
index 95f21b8..06019a7 100644
--- a/ospurge/tests/resources/test_nova.py
+++ b/ospurge/tests/resources/test_nova.py
@@ -10,11 +10,11 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources import nova
+from ospurge.tests import mock
 
 
 class TestServers(unittest.TestCase):
diff --git a/ospurge/tests/resources/test_swift.py b/ospurge/tests/resources/test_swift.py
index e8bfd19..ef7fbb1 100644
--- a/ospurge/tests/resources/test_swift.py
+++ b/ospurge/tests/resources/test_swift.py
@@ -10,11 +10,11 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources import swift
+from ospurge.tests import mock
 
 
 class TestListObjectsMixin(unittest.TestCase):
diff --git a/ospurge/tests/test_main.py b/ospurge/tests/test_main.py
index 7b082b5..af2010b 100644
--- a/ospurge/tests/test_main.py
+++ b/ospurge/tests/test_main.py
@@ -13,13 +13,13 @@ import argparse
 import logging
 import types
 import unittest
-from unittest import mock
 
 import shade.exc
 
 from ospurge import exceptions
 from ospurge import main
 from ospurge.resources.base import ServiceResource
+from ospurge.tests import mock
 from ospurge import utils
 
 
diff --git a/ospurge/tests/test_utils.py b/ospurge/tests/test_utils.py
index 69d31a8..d0d4932 100644
--- a/ospurge/tests/test_utils.py
+++ b/ospurge/tests/test_utils.py
@@ -12,11 +12,11 @@
 import logging
 import typing
 import unittest
-from unittest import mock
 
 import shade
 
 from ospurge.resources.base import ServiceResource
+from ospurge.tests import mock
 from ospurge import utils
 
 
diff --git a/test-requirements.txt b/test-requirements.txt
index a44ac16..07076a2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,3 +5,7 @@ hacking>=0.12.0,<0.13  # Apache-2.0
 openstackdocstheme>=1.5.0  # Apache-2.0
 sphinx>=1.2.1,!=1.3b1,<1.4  # BSD
 testrepository>=0.0.18  # Apache-2.0/BSD
+
+# Python 2.7 dependencies
+mock; python_version < '3.0'
+unittest2; python_version < '3.0'