diff --git a/test/support/dummy_example.rb b/test/support/dummy_example.rb
index ba022fb3..19170fe4 100644
--- a/test/support/dummy_example.rb
+++ b/test/support/dummy_example.rb
@@ -88,7 +88,7 @@ def run_progress
 
     class WeightedPolling < Dynflow::Action
 
-      def plan(input)
+      def plan(input = {})
         sequence do
           plan_self(input, **{})
           plan_action(Polling, input, **{})