diff --git a/requirements-dev.txt b/requirements-dev.txt
index 39bbeee4..d9db059d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,8 +10,6 @@ twine
 
 # Tests
 flake8
-# mock>1.0.1 requires setuptools>17
-mock<=1.0.1
 py
 pytest
 pytest-datafiles
diff --git a/tests/__init__.py b/tests/__init__.py
index 7a99ea33..2c5f80ea 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,7 +2,7 @@
 
 import os
 import datetime
-import mock
+from unittest import mock
 from io import StringIO
 
 import py
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 14612846..b993767f 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -9,7 +9,7 @@
 import datetime
 import operator
 from io import StringIO
-from mock import patch
+from unittest.mock import patch
 import pytest
 from click.exceptions import Abort
 from dateutil.tz import tzutc