diff --git a/tests/test_refunds.py b/tests/test_refunds.py
index 0ebe066..f7951d7 100644
--- a/tests/test_refunds.py
+++ b/tests/test_refunds.py
@@ -403,7 +403,8 @@ def test_create_payin_refund(self):
 
         params = {
             "author": self.card.user,
-            "payin": direct_payin
+            "payin": direct_payin,
+            "statement_descriptor": "My descriptor"
         }
         payin_refund = PayInRefund(**params)