diff --git a/tests/benchmark/milvus_benchmark/config.py b/tests/benchmark/milvus_benchmark/config.py
index b20b882a9f..3d49c820f4 100644
--- a/tests/benchmark/milvus_benchmark/config.py
+++ b/tests/benchmark/milvus_benchmark/config.py
@@ -49,6 +49,7 @@ MINIO_ACCESS_KEY = "minioadmin"
 MINIO_SECRET_KEY = "minioadmin"
 MINIO_BUCKET_NAME = "test"
 
+# precision of params
 FLUSH_PRECISION = 4
 INDEX_PRECISION = 4
 SEARCH_PRECISION = 4