diff --git a/capsul/dataset.py b/capsul/dataset.py
index 1e8197e9..32aa6b4f 100644
--- a/capsul/dataset.py
+++ b/capsul/dataset.py
@@ -1244,7 +1244,8 @@ def path_for_parameters(self, executable, parameters=None):
 
         if parameters is None:
             parameters = [
-                field.name for field in executable.user_fields()  # if field.path_type
+                field.name
+                for field in executable.user_fields()  # if field.path_type
             ]
         if self.debug:
             if self._current_iteration is not None: