diff --git a/tests/simulation_events_test.py b/tests/simulation_events_test.py
index 5169c23..7947ccc 100755
--- a/tests/simulation_events_test.py
+++ b/tests/simulation_events_test.py
@@ -45,7 +45,7 @@
 
     events = simulation.get_events()
 
-    assert len(events) == 1, f"There should be a single simulation event (instead there are {len(events)}"
+    assert len(events) == 1, "There should be a single simulation event (instead there are " + str(len(events)) + ")"
     assert events[0]["event_type"] == "standard_job_completion", "Event type is unexpected"
 
     simulation.terminate()