diff --git a/poky/bitbake/lib/bb/tests/cow.py b/poky/bitbake/lib/bb/tests/cow.py
index b4af4bb..bf6e79f 100644
--- a/poky/bitbake/lib/bb/tests/cow.py
+++ b/poky/bitbake/lib/bb/tests/cow.py
@@ -7,7 +7,7 @@
 #
 
 import unittest
-import os
+
 
 class COWTestCase(unittest.TestCase):
     """