diff --git a/watcher/decision_engine/scoring/dummy_scoring_container.py b/watcher/decision_engine/scoring/dummy_scoring_container.py
index 5b89bdf52..daf44f5ec 100644
--- a/watcher/decision_engine/scoring/dummy_scoring_container.py
+++ b/watcher/decision_engine/scoring/dummy_scoring_container.py
@@ -37,7 +37,7 @@ class DummyScoringContainer(base.ScoringEngineContainer):
     """
 
     @classmethod
-    def get_scoring_engine_list(self):
+    def get_scoring_engine_list(cls):
         return [
             SimpleFunctionScorer(
                 'dummy_min_scorer',