diff --git a/tests/canary/agent/canary.py b/tests/canary/agent/canary.py
index 1f73090..704e6ee 100644
--- a/tests/canary/agent/canary.py
+++ b/tests/canary/agent/canary.py
@@ -31,7 +31,7 @@ async def app(init, last_run_duration, metrics):
 
 async def main():
     init = True
-    duration = None
+    duration = 0
     # wait for agent to start
     # TODO: this should not be needed if we're using a ring buffer to queue and re-try events
     await asyncio.sleep(10)