diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 7992222703..75b8ee95e7 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -1016,7 +1016,7 @@ test_must_fail_acceptable () {
 	fi
 
 	case "$1" in
-	git|__git*|test-tool|test_terminal)
+	git|__git*|scalar|test-tool|test_terminal)
 		return 0
 		;;
 	*)