diff --git a/contract_mandate/tests/test_contract_mandate.py b/contract_mandate/tests/test_contract_mandate.py
index 3e188d230..31a11b9d0 100644
--- a/contract_mandate/tests/test_contract_mandate.py
+++ b/contract_mandate/tests/test_contract_mandate.py
@@ -60,6 +60,9 @@ class TestContractMandate(TestContractBase):
         self.contract_with_mandate.mandate_required = False
         self.contract_with_mandate._onchange_payment_mode_id()
         self.assertFalse(self.contract_with_mandate.mandate_id)
+        self.contract_with_mandate.mandate_required = True
+        self.contract_with_mandate._onchange_payment_mode_id()
+        self.assertFalse(self.contract_with_mandate.mandate_id)
 
     def test_contract_mandate_default(self):
         self.payment_mode.payment_method_id.mandate_required = False