diff --git a/minimum-constraints.txt b/minimum-constraints.txt
index a3ba9471..8dd066ca 100644
--- a/minimum-constraints.txt
+++ b/minimum-constraints.txt
@@ -56,7 +56,6 @@ wheel==0.33.6; python_version >= '3.8'
 # Direct dependencies for install (must be consistent with requirements.txt)
 
 M2Crypto==0.31.0
-mock==2.0.0
 ordereddict==1.1
 ply==3.10
 PyYAML==3.11; python_version == '2.6'
diff --git a/pywbem_mock/_wbemconnection_mock.py b/pywbem_mock/_wbemconnection_mock.py
index e5dd0f8d..6ea95119 100644
--- a/pywbem_mock/_wbemconnection_mock.py
+++ b/pywbem_mock/_wbemconnection_mock.py
@@ -40,7 +40,7 @@ try:
     from collections import Counter
 except ImportError:
     from backport_collections import Counter
-from mock import Mock
+from unittest.mock import Mock
 import six
 
 try:
diff --git a/requirements.txt b/requirements.txt
index 69a01d7c..f1287af2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,6 @@
 
 # On Windows, M2Crypto must be installed via pywbem_os_setup.bat
 M2Crypto>=0.31.0; python_version < '3.0' and sys_platform != 'win32'
-mock>=2.0.0
 ordereddict>=1.1; python_version == '2.6'
 ply>=3.10
 PyYAML>=3.11,<3.12; python_version == '2.6'  # yaml package
diff --git a/tests/unittest/pywbem/test_cim_obj.py b/tests/unittest/pywbem/test_cim_obj.py
index 3d0e3b80..e0d9e39f 100755
--- a/tests/unittest/pywbem/test_cim_obj.py
+++ b/tests/unittest/pywbem/test_cim_obj.py
@@ -12,7 +12,7 @@ from __future__ import absolute_import, print_function
 import sys
 import re
 from datetime import timedelta, datetime
-from mock import patch
+from unittest.mock import patch
 try:
     from collections import OrderedDict
 except ImportError:
diff --git a/tests/unittest/pywbem/test_itermethods.py b/tests/unittest/pywbem/test_itermethods.py
index 635bd130..7343f6fe 100644
--- a/tests/unittest/pywbem/test_itermethods.py
+++ b/tests/unittest/pywbem/test_itermethods.py
@@ -24,7 +24,7 @@ from __future__ import absolute_import, print_function
 import pytest
 import six
 
-from mock import Mock
+from unittest.mock import Mock
 
 from ...utils import import_installed
 pywbem = import_installed('pywbem')  # noqa: E402
diff --git a/tests/unittest/pywbem/test_valuemapping.py b/tests/unittest/pywbem/test_valuemapping.py
index 27f86588..db31d3c3 100644
--- a/tests/unittest/pywbem/test_valuemapping.py
+++ b/tests/unittest/pywbem/test_valuemapping.py
@@ -7,7 +7,7 @@ from __future__ import absolute_import
 
 import re
 import pytest
-from mock import Mock
+from unittest.mock import Mock
 
 from ...utils import import_installed
 pywbem = import_installed('pywbem')  # noqa: E402