diff --git a/tests/benchmark/milvus_benchmark/main.py b/tests/benchmark/milvus_benchmark/main.py
index 4368468b86..14caeea80e 100644
--- a/tests/benchmark/milvus_benchmark/main.py
+++ b/tests/benchmark/milvus_benchmark/main.py
@@ -157,6 +157,8 @@ def main():
         metavar='FILE',
         help='load test suite from FILE',
         default='')
+
+    # Milvus deploy config file
     arg_parser.add_argument(
         '--server-config',
         metavar='FILE',