diff -aur yarg-0.1.9.old/requirements-test.txt yarg-0.1.9/requirements-test.txt
--- yarg-0.1.9.old/requirements-test.txt	2023-05-01 21:05:56.850103096 +0200
+++ yarg-0.1.9/requirements-test.txt	2023-05-01 21:06:37.230760899 +0200
@@ -1,3 +1,2 @@
 nose
 coveralls
-mock
diff -aur yarg-0.1.9.old/tests/test_client.py yarg-0.1.9/tests/test_client.py
--- yarg-0.1.9.old/tests/test_client.py	2023-05-01 21:05:56.850103096 +0200
+++ yarg-0.1.9/tests/test_client.py	2023-05-01 21:06:09.133639028 +0200
@@ -1,7 +1,7 @@
 import os
 import unittest
 
-from mock import call, MagicMock, patch
+from unittest.mock import call, MagicMock, patch
 
 from yarg import get, HTTPError
 
diff -aur yarg-0.1.9.old/tests/test_parse.py yarg-0.1.9/tests/test_parse.py
--- yarg-0.1.9.old/tests/test_parse.py	2023-05-01 21:05:56.850103096 +0200
+++ yarg-0.1.9/tests/test_parse.py	2023-05-01 21:06:09.133639028 +0200
@@ -2,7 +2,7 @@
 import os
 import unittest
 
-from mock import call, MagicMock, patch
+from unittest.mock import call, MagicMock, patch
 
 from yarg import newest_packages, latest_updated_packages, HTTPError
 from yarg.parse import _get, Package
diff -aur yarg-0.1.9.old/tox.ini yarg-0.1.9/tox.ini
--- yarg-0.1.9.old/tox.ini	2023-05-01 21:05:56.850103096 +0200
+++ yarg-0.1.9/tox.ini	2023-05-01 21:06:09.133639028 +0200
@@ -1,10 +1,9 @@
 [tox]
-envlist = py26, py27, py33, py34, pypy, pypy3, docs, flake8
+envlist = py26, py27, py33, py34, py38, pypy, pypy3, docs, flake8
 
 [testenv]
 deps = nose
        requests
-       mock
 commands = nosetests
 
 [testenv:flake8]