diff --git a/tests/benchmark/milvus_benchmark/parser.py b/tests/benchmark/milvus_benchmark/parser.py
index 21622b51e6..160a18b3ab 100644
--- a/tests/benchmark/milvus_benchmark/parser.py
+++ b/tests/benchmark/milvus_benchmark/parser.py
@@ -36,7 +36,7 @@ def collection_parser(collection_name):
         collection_size = int(collection_size) * 1000000000
     dimension = int(tmp[2])
     metric_type = str(tmp[3])
-    return (data_type, collection_size, dimension, metric_type)
+    return data_type, collection_size, dimension, metric_type
 
 
 def parse_ann_collection_name(collection_name):