diff --git a/tests/test_adapter.py b/tests/test_adapter.py
index 7394f26..58eeac8 100644
--- a/tests/test_adapter.py
+++ b/tests/test_adapter.py
@@ -1,4 +1,4 @@
-import mock
+from unittest import mock
 import pytest
 
 from requests import Session
diff --git a/tests/test_cache_control.py b/tests/test_cache_control.py
index 74bfa7b..f14abec 100644
--- a/tests/test_cache_control.py
+++ b/tests/test_cache_control.py
@@ -2,7 +2,7 @@
 Unit tests that verify our caching methods work correctly.
 """
 import pytest
-from mock import ANY, Mock
+from unittest.mock import ANY, Mock
 import time
 
 from cachecontrol import CacheController
diff --git a/tests/test_etag.py b/tests/test_etag.py
index 2b8e027..0d605e5 100644
--- a/tests/test_etag.py
+++ b/tests/test_etag.py
@@ -1,6 +1,6 @@
 import pytest
 
-from mock import Mock, patch
+from unittest.mock import Mock, patch
 
 import requests
 
diff --git a/tests/test_expires_heuristics.py b/tests/test_expires_heuristics.py
index 2adc95b..796e41a 100644
--- a/tests/test_expires_heuristics.py
+++ b/tests/test_expires_heuristics.py
@@ -4,7 +4,7 @@ import time
 from email.utils import formatdate, parsedate
 from datetime import datetime
 
-from mock import Mock
+from unittest.mock import Mock
 from requests import Session, get
 from requests.structures import CaseInsensitiveDict
 
diff --git a/tests/test_serialization.py b/tests/test_serialization.py
index 8d8ade4..bb97a91 100644
--- a/tests/test_serialization.py
+++ b/tests/test_serialization.py
@@ -1,7 +1,7 @@
 import msgpack
 import requests
 
-from mock import Mock
+from unittest.mock import Mock
 
 from cachecontrol.compat import pickle
 from cachecontrol.serialize import Serializer
diff --git a/tests/test_storage_redis.py b/tests/test_storage_redis.py
index d7b3afc..3c8d122 100644
--- a/tests/test_storage_redis.py
+++ b/tests/test_storage_redis.py
@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from mock import Mock
+from unittest.mock import Mock
 from cachecontrol.caches import RedisCache