diff --git a/monai/apps/auto3dseg/auto_runner.py b/monai/apps/auto3dseg/auto_runner.py
index d06effcd1a..f854265fc6 100644
--- a/monai/apps/auto3dseg/auto_runner.py
+++ b/monai/apps/auto3dseg/auto_runner.py
@@ -229,7 +229,7 @@ def __init__(
             input = os.path.join(os.path.abspath(work_dir), "input.yaml")
             logger.info(f"Input config is not provided, using the default {input}")
 
-        self.data_src_cfg = dict()
+        self.data_src_cfg = {}
         if isinstance(input, dict):
             self.data_src_cfg = input
         elif isinstance(input, str) and os.path.isfile(input):