Prevent spurious error return.

diff --git a/tests/Makefile b/tests/Makefile
index 59f29721d84eec127bbbdd9f6bae6ad0480ec4a9..d188e7074d119afbc64dfd0b9707f160c26e584f 100644 (file)
--- 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