diff --git a/sitecustomize.py b/sitecustomize.py
index d86a887..2e7b96b 100644
--- a/sitecustomize.py
+++ b/sitecustomize.py
@@ -3,6 +3,7 @@ cov = coverage.process_startup()
 
 if cov is not None:
     import atexit
+
     def stop():
         cov.stop()
         cov.save()