diff --git a/fieldservice_stock_account/tests/test_fsm_stock_account.py b/fieldservice_stock_account/tests/test_fsm_stock_account.py
index f3c7205154..4cba2f451d 100644
--- a/fieldservice_stock_account/tests/test_fsm_stock_account.py
+++ b/fieldservice_stock_account/tests/test_fsm_stock_account.py
@@ -4,6 +4,7 @@
 import datetime
 
 from odoo.tests.common import TransactionCase
+from odoo.exceptions import ValidationError
 
 
 class FSMStockAccountCase(TransactionCase):
@@ -76,6 +77,7 @@ def test_fsm_order(self):
         SR_2.action_confirm()
         fsm_order2.account_no_invoice()
         fsm_order2.bill_to = "contact"
-        fsm_order2.account_no_invoice()
+        with self.assertRaises(ValidationError):
+            fsm_order2.account_no_invoice()
         fsm_order2.customer_id = self.test_partner.id
         fsm_order2.account_no_invoice()