diff -up python-fido2-0.9.3/test/test_client.py.mock python-fido2-0.9.3/test/test_client.py
--- python-fido2-0.9.3/test/test_client.py.mock	2021-11-09 04:15:13.000000000 -0700
+++ python-fido2-0.9.3/test/test_client.py	2022-05-19 20:47:06.165307669 -0600
@@ -29,7 +29,7 @@
 
 from __future__ import absolute_import, unicode_literals
 
-import mock
+from unittest import mock
 import unittest
 from threading import Event, Timer
 from binascii import a2b_hex
diff -up python-fido2-0.9.3/test/test_ctap2.py.mock python-fido2-0.9.3/test/test_ctap2.py
--- python-fido2-0.9.3/test/test_ctap2.py.mock	2021-11-09 04:15:13.000000000 -0700
+++ python-fido2-0.9.3/test/test_ctap2.py	2022-05-19 20:44:27.276937443 -0600
@@ -45,7 +45,7 @@ from cryptography.hazmat.backends import
 from cryptography.hazmat.primitives.asymmetric import ec
 
 import unittest
-import mock
+from unittest import mock
 
 _AAGUID = a2b_hex("F8A011F38C0A4D15800617111F9EDC7D")
 _INFO = a2b_hex(
diff -up python-fido2-0.9.3/test/test_pcsc.py.mock python-fido2-0.9.3/test/test_pcsc.py
--- python-fido2-0.9.3/test/test_pcsc.py.mock	2021-11-09 04:15:13.000000000 -0700
+++ python-fido2-0.9.3/test/test_pcsc.py	2022-05-19 20:45:11.291317012 -0600
@@ -28,7 +28,7 @@
 from __future__ import absolute_import, unicode_literals
 
 import unittest
-import mock
+from unittest import mock
 import sys
 from fido2.hid import CTAPHID
 
diff -up python-fido2-0.9.3/test/test_ctap1.py.mock python-fido2-0.9.3/test/test_ctap1.py
--- python-fido2-0.9.3/test/test_ctap1.py.mock	2021-11-09 04:15:13.000000000 -0700
+++ python-fido2-0.9.3/test/test_ctap1.py	2022-05-19 20:49:43.312664818 -0600
@@ -30,7 +30,7 @@ from __future__ import absolute_import,
 from fido2.ctap1 import Ctap1, ApduError
 from binascii import a2b_hex
 import unittest
-import mock
+from unittest import mock
 
 
 class TestCtap1(unittest.TestCase):