diff --git a/bemade_multiple_billing_contacts/models/account_move.py b/bemade_multiple_billing_contacts/models/account_move.py
index 11d2aa0..0e8fe1f 100644
--- a/bemade_multiple_billing_contacts/models/account_move.py
+++ b/bemade_multiple_billing_contacts/models/account_move.py
@@ -29,6 +29,6 @@ class AccountMove(models.Model):
         initial_subscribers = self.message_partner_ids.ids
         final_subscribers = initial_subscribers + self.billing_contacts.ids
         posted = super()._post()
-        self.message_unsubscribe([s.id for s in self.message_partner_ids if s not in initial_subscribers])
+        self.message_unsubscribe([s.id for s in self.message_partner_ids if s.id not in initial_subscribers])
         self.message_subscribe(final_subscribers)
         return posted
diff --git a/bemade_multiple_billing_contacts/tests/test_billing_contacts.py b/bemade_multiple_billing_contacts/tests/test_billing_contacts.py
index 1329090..82c15ce 100644
--- a/bemade_multiple_billing_contacts/tests/test_billing_contacts.py
+++ b/bemade_multiple_billing_contacts/tests/test_billing_contacts.py
@@ -63,7 +63,8 @@ class TestBillingContacts(TransactionCase):
             'price_unit': cls.product.list_price,
             'order_id': cls.sale_order.id,
             'tax_id': False,
-            'qty_delivered_manual': 2,
+            'qty_delivered': 2,
+            'qty_delivered_method': 'manual',
         })
 
     def test_billing_contacts_structure(self):