Re: [PATCH v4] peel_onion(): add support for <rev>^{tag}

diff --git a/t/t1511-rev-parse-caret.sh b/t/t1511-rev-parse-caret.sh
index eaefc77..15973f2 100755
--- a/t/t1511-rev-parse-caret.sh
+++ b/t/t1511-rev-parse-caret.sh

@@ -54,6 +54,13 @@ test_expect_success 'ref^{tree}' '
 	test_must_fail git rev-parse blob-tag^{tree}
 '
 
+test_expect_success 'ref^{tag}' '
+	test_must_fail git rev-parse HEAD^{tag} &&
+	git rev-parse commit-tag >expected &&
+	git rev-parse commit-tag^{tag} >actual &&
+	test_cmp expected actual
+'
+