diff --git a/pysstv/tests/test_sstv.py b/pysstv/tests/test_sstv.py
index 1b7ac39..53da1c5 100644
--- a/pysstv/tests/test_sstv.py
+++ b/pysstv/tests/test_sstv.py
@@ -4,7 +4,7 @@ from six.moves import zip
 import pickle
 import mock
 from mock import MagicMock
-from StringIO import StringIO
+from six import StringIO
 import hashlib
 
 from pysstv import sstv