diff --git a/tests/test_points_to_volumes.py b/tests/test_points_to_volumes.py
index 70a86212..75b0a7c8 100644
--- a/tests/test_points_to_volumes.py
+++ b/tests/test_points_to_volumes.py
@@ -17,6 +17,7 @@ DEBUG = False
 if DEBUG:
     import os
     import tempfile
+
     from PIL import Image