diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 4901fa9..1c58bb8 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest mock
+        python -m pip install flake8 pytest
         python -m pip install -e .
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
diff --git a/test-requirements.txt b/test-requirements.txt
index 3368623..8ef0917 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,2 +1 @@
 pytest<5
-mock<3
diff --git a/tests/test_cache.py b/tests/test_cache.py
index cc004f4..776962e 100644
--- a/tests/test_cache.py
+++ b/tests/test_cache.py
@@ -1,6 +1,6 @@
 import json
 import os
-import mock
+from unittest import mock
 import unittest
 from pathlib import Path