diff --git a/tests/unit_tests.py b/tests/unit_tests.py
index 3677651..630e046 100644
--- a/tests/unit_tests.py
+++ b/tests/unit_tests.py
@@ -71,3 +71,4 @@ class UnitTests(unittest.TestCase):
     files = glob.glob('output/[!.]*')
     for file in files:
       os.unlink(file)
+