1 files changed, 1 insertions, 1 deletions

diff --git a/tests/t_mutex.c b/tests/t_mutex.c
index e54e2fa..c0c41cc 100644
--- a/tests/t_mutex.c
+++ b/tests/t_mutex.c
@@ -24,7 +24,7 @@ static void hash_for_bucket(ot_hash hash, int bucket) {
 }
 
 static void case_a_hash_names_its_bucket(void) {
-  static const int buckets[] = {0, 1, 2, 17, 511, 512, OT_BUCKET_COUNT - 1};
+  static const int buckets[] = {0, 1, 2, 17, OT_BUCKET_COUNT / 2 - 1, OT_BUCKET_COUNT / 2, OT_BUCKET_COUNT - 1};
   size_t           i;
 
   test_case("a hash is served by the bucket its leading bits name");