diff --git a/tests/benchmark/milvus_benchmark/parser.py b/tests/benchmark/milvus_benchmark/parser.py
index 9a4746f722..21622b51e6 100644
--- a/tests/benchmark/milvus_benchmark/parser.py
+++ b/tests/benchmark/milvus_benchmark/parser.py
@@ -9,7 +9,7 @@ def operations_parser(operations):
         raise Exception("No operations in suite defined")
     for run_type, run_params in operations.items():
         logger.debug(run_type)
-        return (run_type, run_params)
+        return run_type, run_params
 
 
 def collection_parser(collection_name):