diff --git a/test/test_callinfo.py b/test/test_callinfo.py
index 024cfe9..9c7d0d0 100644
--- a/test/test_callinfo.py
+++ b/test/test_callinfo.py
@@ -1,3 +1,4 @@
+from __future__ import unicode_literals
 from datetime import datetime
 
 import pytest