--- a/tests/test_reqparse.py
+++ b/tests/test_reqparse.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 import unittest
-from mock import Mock, patch
+from unittest.mock import Mock, patch
 from flask import Flask
 from werkzeug import exceptions
 from werkzeug.wrappers import Request
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -2,7 +2,7 @@
 from functools import partial
 import zoneinfo
 import unittest
-from mock import Mock
+from unittest.mock import Mock
 from flask_restful.fields import MarshallingException
 from flask_restful.utils import OrderedDict
 from flask_restful import fields