diff --git a/tests/handlers/test_identity.py b/tests/handlers/test_identity.py
index e8192d83b9..6a0e784dd7 100644
--- a/tests/handlers/test_identity.py
+++ b/tests/handlers/test_identity.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mock import Mock
+from unittest.mock import Mock
 
 from twisted.internet import defer
 
diff --git a/tests/rest/client/test_identity.py b/tests/rest/client/test_identity.py
index bb0baa0e06..013b2049e6 100644
--- a/tests/rest/client/test_identity.py
+++ b/tests/rest/client/test_identity.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mock import Mock
+from unittest.mock import Mock
 
 from twisted.internet import defer
 
diff --git a/tests/rest/client/test_room_access_rules.py b/tests/rest/client/test_room_access_rules.py
index 65d27e9165..537bb5ca9d 100644
--- a/tests/rest/client/test_room_access_rules.py
+++ b/tests/rest/client/test_room_access_rules.py
@@ -16,7 +16,7 @@ import json
 import random
 import string
 
-from mock import Mock
+from unittest.mock import Mock
 
 from twisted.internet import defer
 
diff --git a/tests/rest/client/v2_alpha/test_register.py b/tests/rest/client/v2_alpha/test_register.py
index ec1009abc5..f55e03bacd 100644
--- a/tests/rest/client/v2_alpha/test_register.py
+++ b/tests/rest/client/v2_alpha/test_register.py
@@ -20,7 +20,7 @@ import os.path
 import tempfile
 
 import pkg_resources
-from mock import Mock
+from unittest.mock import Mock
 
 from twisted.internet import defer