diff --git a/tst/tools/test_resources_codegen.py b/tst/tools/test_resources_codegen.py
index 9e81da26..916d04c4 100644
--- a/tst/tools/test_resources_codegen.py
+++ b/tst/tools/test_resources_codegen.py
@@ -1253,7 +1253,7 @@ def test_get_node(self):
 @Base.add_validate_call
 def get_node(
     self,
-    node_id: str,
+    node_id: Optional[str] = Unassigned(),
     session: Optional[Session] = None,
     region: Optional[str] = None,
 ) -> Optional[shapes.ClusterNodeDetails]: