diff --git a/combo/apps/lingo/models.py b/combo/apps/lingo/models.py
index aeca946f..b4c9c65e 100644
--- a/combo/apps/lingo/models.py
+++ b/combo/apps/lingo/models.py
@@ -746,9 +746,19 @@ class TipiPaymentFormCell(CellBase):
     def get_cell_extra_context(self, context):
         extra_context = super(TipiPaymentFormCell, self).get_cell_extra_context(context)
         form_fields = self.get_default_form_class().base_fields
-        field_definitions = ({'protocol': 'any', 'fields': ['exer']},
-                  {'protocol': 'pesv2', 'fields': ['idligne', 'idpce']},
-                  {'protocol': 'rolmre', 'fields': ['rolrec', 'roldeb', 'roldet']}
+        field_definitions = (
+            {
+                'protocol': 'any',
+                'fields': ['exer']
+            },
+            {
+                'protocol': 'pesv2',
+                'fields': ['idpce', 'idligne']
+            },
+            {
+                'protocol': 'rolmre',
+                'fields': ['rolrec', 'roldeb', 'roldet']
+            },
         )
         reference_fields = []
         for definition in field_definitions: