diff --git a/radicale/tests/__init__.py b/radicale/tests/__init__.py
index d15a09d..fc981c6 100644
--- a/radicale/tests/__init__.py
+++ b/radicale/tests/__init__.py
@@ -23,6 +23,7 @@ import os
 import sys
 from io import BytesIO
 
+# Allow importing of tests.custom....
 sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))