diff --git a/scripts/mock_client.py b/scripts/mock_client.py
index d13b0c9..89b2b90 100644
--- a/scripts/mock_client.py
+++ b/scripts/mock_client.py
@@ -48,7 +48,8 @@ def build_message_bodies(analyse_container_type):
             message_dict.update({"targetFileExtension": "ORIGIN.pdf.gz", "responseFileExtension": "IMAGE_INFO.json.gz"})
         if analyse_container_type == "ner":
             message_dict.update(
-                {"targetFileExtension": "TEXT.json.gz", "responseFileExtension": "NER_ENTITIES.json.gz"})
+                {"targetFileExtension": "TEXT.json.gz", "responseFileExtension": "NER_ENTITIES.json.gz"}
+            )
         return message_dict
 
     storage = get_s3_storage()