diff --git a/account_banking_mandate/tests/test_invoice_mandate.py b/account_banking_mandate/tests/test_invoice_mandate.py
index c05bce6c3..0111ba0bd 100644
--- a/account_banking_mandate/tests/test_invoice_mandate.py
+++ b/account_banking_mandate/tests/test_invoice_mandate.py
@@ -10,6 +10,8 @@ class TestInvoiceMandate(TransactionCase):
 
     def test_post_invoice_01(self):
         self.invoice._onchange_partner_id()
+        # Make sure proper payment mode is selected
+        self.invoice.payment_mode_id = self.mode_inbound_acme.id
 
         self.assertEqual(self.invoice.mandate_id, self.mandate)