diff --git a/test-requirements.txt b/test-requirements.txt
index 01cd338..71511ae 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 coverage
-mock
+mock ; python_version < '3.3'
 nose
 six
 unittest2 ; python_version < '2.7'
diff --git a/tests/unit/test_mechanism.py b/tests/unit/test_mechanism.py
index 0f5d161..4201fe9 100644
--- a/tests/unit/test_mechanism.py
+++ b/tests/unit/test_mechanism.py
@@ -12,7 +12,11 @@
 else:
     import kerberos
 
-from mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
+
 import six
 import struct