diff --git a/t/t7505-prepare-commit-msg-hook.sh b/t/t7505-prepare-commit-msg-hook.sh
index 1c95652dc..5531abb0c 100755
--- a/t/t7505-prepare-commit-msg-hook.sh
+++ b/t/t7505-prepare-commit-msg-hook.sh
@@ -154,7 +154,7 @@ test_expect_success 'with failing hook' '
 	head=`git rev-parse HEAD` &&
 	echo "more" >> file &&
 	git add file &&
-	! GIT_EDITOR="\"\$FAKE_EDITOR\"" git commit -c $head
+	test_must_fail env GIT_EDITOR="\"\$FAKE_EDITOR\"" git commit -c $head
 
 '
 
@@ -163,7 +163,7 @@ test_expect_success 'with failing hook (--no-verify)' '
 	head=`git rev-parse HEAD` &&
 	echo "more" >> file &&
 	git add file &&
-	! GIT_EDITOR="\"\$FAKE_EDITOR\"" git commit --no-verify -c $head
+	test_must_fail env GIT_EDITOR="\"\$FAKE_EDITOR\"" git commit --no-verify -c $head
 
 '