diff --git a/tests/Makefile b/tests/Makefile
index 59f2972..d188e70 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -30,7 +30,7 @@ TESTLOADS := $(shell ls -1 *.log | sed '/.log/s///' | sort)
 check: savecheck
 	@make tap | tapview
 	@echo "=== No diff output is good news."
-	@-advent -x 2>/dev/null	# Get usage message into coverage tests
+	@-advent -x 2>/dev/null	|| exit 0 # Get usage message into coverage tests
 	@-advent -l /dev/null <pitfall.log >/dev/null
 
 .SUFFIXES: .chk