diff -upr magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_rlimits.py magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_rlimits.py
--- magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_rlimits.py	2022-05-17 17:47:03.933492047 +0200
+++ magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_rlimits.py	2022-05-17 17:47:03.937492072 +0200
@@ -1,5 +1,5 @@
 from __future__ import print_function, unicode_literals
-import mock
+from unittest import mock
 from twisted.trial import unittest
 from ..increase_rlimits import increase_rlimits
 
diff -upr magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_service.py magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_service.py
--- magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_service.py	2022-05-17 17:47:03.933492047 +0200
+++ magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_service.py	2022-05-17 17:47:03.937492072 +0200
@@ -1,6 +1,6 @@
 from __future__ import unicode_literals, print_function
 from twisted.trial import unittest
-import mock
+from unittest import mock
 from twisted.application.service import MultiService
 from .. import server_tap
 
diff -upr magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_stats.py magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_stats.py
--- magic-wormhole-transit-relay-0.2.1.orig/src/wormhole_transit_relay/test/test_stats.py	2022-05-17 17:47:03.933492047 +0200
+++ magic-wormhole-transit-relay-0.2.1/src/wormhole_transit_relay/test/test_stats.py	2022-05-17 17:47:03.937492072 +0200
@@ -1,6 +1,6 @@
 from __future__ import print_function, unicode_literals
 import os, io, json, sqlite3
-import mock
+from unittest import mock
 from twisted.trial import unittest
 from ..transit_server import Transit
 from .. import database