diff --git a/t/t5701-git-serve.sh b/t/t5701-git-serve.sh
index 9a575aa098..51d5dd1ae6 100755
--- a/t/t5701-git-serve.sh
+++ b/t/t5701-git-serve.sh
@@ -344,20 +344,23 @@ test_expect_success 'unexpected lines are not allowed in fetch request' '
 test_expect_success 'basics of object-info' '
 	test_config transfer.advertiseObjectInfo true &&
 
+	two_oid=$(git rev-parse two:two.t) &&
+	two_size=$(test_file_size two.t) &&
+
 	test-tool pkt-line pack >in <<-EOF &&
 	command=object-info
 	object-format=$(test_oid algo)
 	0001
 	size
-	oid $(git rev-parse two:two.t)
-	oid $(git rev-parse two:two.t)
+	oid $two_oid
+	oid $two_oid
 	0000
 	EOF
 
 	cat >expect <<-EOF &&
 	size
-	$(git rev-parse two:two.t) $(wc -c <two.t | xargs)
-	$(git rev-parse two:two.t) $(wc -c <two.t | xargs)
+	$two_oid $two_size
+	$two_oid $two_size
 	0000
 	EOF