diff --git a/run_tests.py b/run_tests.py
index 1506945..aeccb57 100755
--- a/run_tests.py
+++ b/run_tests.py
@@ -6,6 +6,10 @@
 # Copyright © 2007–13 martin f. krafft <madduck@madduck.net>
 # Released under the terms of the Artistic Licence 2.0
 #
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
 
 import unittest
 tests = unittest.TestLoader().discover('reclass')