diff --git a/modoboa/policyd/tests.py b/modoboa/policyd/tests.py
index 382e48cb8..f3cb18062 100644
--- a/modoboa/policyd/tests.py
+++ b/modoboa/policyd/tests.py
@@ -1,7 +1,8 @@
 """Policy daemon related tests."""
 
 import asyncio
-from mock import patch
+# from mock import patch
+from asynctest import patch
 from multiprocessing import Process
 import socket
 import time
diff --git a/test-requirements.txt b/test-requirements.txt
index 213307c99..0eda6bc01 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,3 +3,4 @@ factory-boy>=2.4
 httmock==1.3.0
 testfixtures==6.10.3
 tox
+asynctest