diff --git a/smoketest/runner.py b/smoketest/runner.py
index 97cc20a..9779b40 100644
--- a/smoketest/runner.py
+++ b/smoketest/runner.py
@@ -150,7 +150,7 @@ class SmoketestRun:
         td = None
         if isinstance(chart, SSCChart):
             with context.perform("TimingData+ssc") as context:
-                td = TimingData(sim, chart)
+                td = TimingData(chart)
             with context.perform("displaybpm+ssc") as context:
                 displaybpm(sim)
         else: