diff --git a/test/test_pack.py b/test/test_pack.py
index 357cb3c..2e1ac22 100644
--- a/test/test_pack.py
+++ b/test/test_pack.py
@@ -5,7 +5,7 @@ from nose import main
 from nose.tools import *
 from nose.plugins.skip import SkipTest
 
-from msgpack import packs, unpacks
+from msgpack import packs, unpacks, Packer, Unpacker
 
 from StringIO import StringIO