diff --git a/t/t7510-signed-commit.sh b/t/t7510-signed-commit.sh
index 13331e533..4fc376edb 100755
--- a/t/t7510-signed-commit.sh
+++ b/t/t7510-signed-commit.sh
@@ -81,6 +81,13 @@ test_expect_success GPG 'verify and show signatures' '
 	)
 '
 
+test_expect_failure GPG 'verify-commit exits success on untrusted signature' '
+	git verify-commit eighth-signed-alt 2>actual &&
+	grep "Good signature from" actual &&
+	! grep "BAD signature from" actual &&
+	grep "not certified" actual
+'
+
 test_expect_success GPG 'show signed commit with signature' '
 	git show -s initial >commit &&
 	git show -s --show-signature initial >show &&