diff --git a/Makefile b/Makefile
index 640ed4b..48f4f27 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ ctrl: test-backup
 .PHONY: test-backup
 test-backup: .venv
 	.venv/bin/mypy backup.py
-	./backup.py | tr '\0' '\n' #-n
+	./backup.py -n
 
 .PHONY: test-setup
 test-setup: