diff --git a/lib/xos-synchronizer/tests/event_steps/event_step.py b/lib/xos-synchronizer/tests/event_steps/event_step.py
index 601b8df..d04f5a5 100644
--- a/lib/xos-synchronizer/tests/event_steps/event_step.py
+++ b/lib/xos-synchronizer/tests/event_steps/event_step.py
@@ -22,8 +22,8 @@
     topics = ["sometopic"]
     pattern = None
 
-    def __init__(self, log, *args, **kwargs):
-        super(TestEventStep, self).__init__(log, *args, **kwargs)
+    def __init__(self, model_accessor, log, *args, **kwargs):
+        super(TestEventStep, self).__init__(model_accessor, log, *args, **kwargs)
 
     def process_event(self, event):
         print("received an event", event)