diff --git a/test-requirements.txt b/test-requirements.txt
index 93207c1..905c2e7 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,2 +1,2 @@
-mox
+mox3
 nose
diff --git a/tests/test_websocket.py b/tests/test_websocket.py
index 9d538db..d8acb4f 100644
--- a/tests/test_websocket.py
+++ b/tests/test_websocket.py
@@ -22,7 +22,7 @@ import select
 import shutil
 import socket
 import ssl
-import stubout
+from mox3 import stubout
 import sys
 import tempfile
 import unittest
diff --git a/tests/test_websocketproxy.py b/tests/test_websocketproxy.py
index 92fd5db..8e37138 100644
--- a/tests/test_websocketproxy.py
+++ b/tests/test_websocketproxy.py
@@ -20,7 +20,7 @@ import unittest
 import unittest
 import socket
 
-import stubout
+from mox3 import stubout
 
 from websockify import websocket
 from websockify import websocketproxy