diff --git a/sgp4/tests.py b/sgp4/tests.py
index 66e306a..95debfc 100644
--- a/sgp4/tests.py
+++ b/sgp4/tests.py
@@ -2,7 +2,7 @@
 
 try:
     from unittest2 import TestCase, main
-except:
+except ImportError:
     from unittest import TestCase, main
 
 import datetime as dt