diff --git a/t/t7501-commit.sh b/t/t7501-commit.sh
index 7940901..e1181f0 100755
--- a/t/t7501-commit.sh
+++ b/t/t7501-commit.sh
@@ -88,6 +88,16 @@
 	"amend commit" \
 	"EDITOR=./editor git commit --amend"
 
+test_expect_success 'amend --only ignores staged contents' '
+	cp file file.expect &&
+	echo changed >file &&
+	git add file &&
+	git commit --no-edit --amend --only &&
+	git cat-file blob HEAD:file >file.actual &&
+	test_cmp file.expect file.actual &&
+	git diff --exit-code
+'
+
 test_expect_success \
 	"passing -m and -F" \
 	"echo 'enough with the bongos' >file && \