diff --git a/tests/silenttestrunner.py b/tests/silenttestrunner.py
--- a/tests/silenttestrunner.py
+++ b/tests/silenttestrunner.py
@@ -1,7 +1,7 @@
 from __future__ import absolute_import, print_function
+import os
+import sys
 import unittest
-import sys
-import os
 
 def main(modulename):
     '''run the tests found in module, printing nothing when all tests pass'''