diff --git a/test/lint/git-subtree-check.sh b/test/lint/git-subtree-check.sh
--- a/test/lint/git-subtree-check.sh
+++ b/test/lint/git-subtree-check.sh
@@ -18,7 +18,7 @@
 	sub=
 	git log --grep="^git-subtree-dir: $dir/*\$" \
 		--pretty=format:'START %H%n%s%n%n%b%nEND%n' "$COMMIT" |
-	while read a b junk; do
+	while read a b _; do
 		case "$a" in
 			START) sq="$b" ;;
 			git-subtree-mainline:) main="$b" ;;