diff --git a/pymemcache/test/test_client.py b/pymemcache/test/test_client.py
index 8b323ded..f0aac442 100644
--- a/pymemcache/test/test_client.py
+++ b/pymemcache/test/test_client.py
@@ -1,5 +1,4 @@
 # Copyright 2012 Pinterest.com
-# -*- coding: utf-8 -*-
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,8 +19,8 @@
 import functools
 import json
 import os
-import mock
 import platform
+from unittest import mock
 import re
 import socket
 import sys
diff --git a/pymemcache/test/test_client_hash.py b/pymemcache/test/test_client_hash.py
index ad3f2dac..ceab7052 100644
--- a/pymemcache/test/test_client_hash.py
+++ b/pymemcache/test/test_client_hash.py
@@ -7,7 +7,7 @@
 import unittest
 import os
 import pytest
-import mock
+from unittest import mock
 import socket
 
 
diff --git a/pymemcache/test/test_client_retry.py b/pymemcache/test/test_client_retry.py
index 230a941..de64a46 100644
--- a/pymemcache/test/test_client_retry.py
+++ b/pymemcache/test/test_client_retry.py
@@ -2,8 +2,8 @@
 
 import functools
 import unittest
+from unittest import mock
 
-import mock
 import pytest
 
 from .test_client import ClientTestMixin, MockSocket