diff --git a/borg/testsuite/archive.py b/borg/testsuite/archive.py
index a963573ec..662d776c9 100644
--- a/borg/testsuite/archive.py
+++ b/borg/testsuite/archive.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timezone
+from unittest.mock import Mock
 
 import msgpack
-from mock import Mock
 
 from ..archive import Archive, CacheChunkBuffer, RobustUnpacker
 from ..key import PlaintextKey
diff --git a/borg/testsuite/archiver.py b/borg/testsuite/archiver.py
index f75cc120c..74e41152d 100644
--- a/borg/testsuite/archiver.py
+++ b/borg/testsuite/archiver.py
@@ -11,9 +11,9 @@ import shutil
 import tempfile
 import time
 import unittest
+from unittest.mock import patch
 from hashlib import sha256
 
-from mock import patch
 import pytest
 
 from .. import xattr
diff --git a/borg/testsuite/repository.py b/borg/testsuite/repository.py
index 7027cb59a..3da7b80ff 100644
--- a/borg/testsuite/repository.py
+++ b/borg/testsuite/repository.py
@@ -2,8 +2,7 @@ import os
 import shutil
 import sys
 import tempfile
-
-from mock import patch
+from unittest.mock import patch
 
 from ..hashindex import NSIndex
 from ..helpers import Location, IntegrityError
diff --git a/requirements.d/development.txt b/requirements.d/development.txt
index bf21d52a2..7c1624b4d 100644
--- a/requirements.d/development.txt
+++ b/requirements.d/development.txt
@@ -1,6 +1,5 @@
 virtualenv<14.0
 tox
-mock
 pytest
 pytest-cov<2.0.0
 pytest-benchmark>=3.0.0