diff --git a/tools/testing/selftests/bpf/test_skb_cgroup_id_user.c b/tools/testing/selftests/bpf/test_skb_cgroup_id_user.c
index 9220747c069db6518b29cd0b3e106c6fafecbd01..356351c0ac28e81194ce6cecaa83769e79f0cb99 100644
--- a/tools/testing/selftests/bpf/test_skb_cgroup_id_user.c
+++ b/tools/testing/selftests/bpf/test_skb_cgroup_id_user.c
@@ -120,7 +120,7 @@ int check_ancestor_cgroup_ids(int prog_id)
 	int err = 0;
 	int map_fd;
 
-	expected_ids[0] = 0x100000001;	/* root cgroup */
+	expected_ids[0] = get_cgroup_id("/..");	/* root cgroup */
 	expected_ids[1] = get_cgroup_id("");
 	expected_ids[2] = get_cgroup_id(CGROUP_PATH);
 	expected_ids[3] = 0; /* non-existent cgroup */