Reverts docstring quoting syntax.
diff --git a/tests/test_integers.py b/tests/test_integers.py
index c73be2c..0a712aa 100644
--- a/tests/test_integers.py
+++ b/tests/test_integers.py
@@ -1,4 +1,4 @@
-"""Tests integer operations."""
+'''Tests integer operations.'''
 
 import unittest2