diff --git a/robot-server/tests/integration/robot_client.py b/robot-server/tests/integration/robot_client.py
index 4ef7549fcea..7e6b70c09f6 100644
--- a/robot-server/tests/integration/robot_client.py
+++ b/robot-server/tests/integration/robot_client.py
@@ -127,7 +127,9 @@ async def post_protocol(
         multipart_upload_name = "files"
 
         with contextlib.ExitStack() as file_exit_stack:
-            opened_files: List[Union[BinaryIO, Tuple[str, bytes]],] = []
+            opened_files: List[
+                Union[BinaryIO, Tuple[str, bytes]],
+            ] = []
 
             for file in files:
                 if isinstance(file, Path):