diff --git a/tests/core/data_layer/test_data_rpc.py b/tests/core/data_layer/test_data_rpc.py
index 27bcc232f1..b13310d0d3 100644
--- a/tests/core/data_layer/test_data_rpc.py
+++ b/tests/core/data_layer/test_data_rpc.py
@@ -69,7 +69,7 @@ async def one_wallet_node_and_rpc(bt: BlockTools) -> AsyncIterator[nodes_with_po
             hostname,
             daemon_port,
             wallet_node_0.server._port,
-            lambda x: None,
+            lambda: None,
             bt.root_path,
             config,
             connect_to_daemon=False,