diff --git a/lightspark/lightspark_client.py b/lightspark/lightspark_client.py
index 3bcc6a5..250c46c 100644
--- a/lightspark/lightspark_client.py
+++ b/lightspark/lightspark_client.py
@@ -284,7 +284,6 @@ def create_test_mode_payment(
         json = self._requester.execute_graphql(
             CREATE_TEST_MODE_PAYMENT_MUTATION,
             variables,
-            self.get_signing_key(local_node_id),
         )
         return IncomingPayment_from_json(
             self._requester, json["create_test_mode_payment"]["incoming_payment"]