diff --git a/template/calfbox/py/nullbox.py b/template/calfbox/py/nullbox.py
index f389766..246804d 100644
--- a/template/calfbox/py/nullbox.py
+++ b/template/calfbox/py/nullbox.py
@@ -58,3 +58,4 @@ sys.modules["calfbox"] = sys.modules["calfbox.nullbox"]
 import calfbox
 
 cbox = NullCalfbox("fake cbox null client")
+