diff --git a/tests/fixtures/p23-03/observation.gd b/tests/fixtures/p23-03/observation.gd
index b077ab1..25383a9 100644
--- a/tests/fixtures/p23-03/observation.gd
+++ b/tests/fixtures/p23-03/observation.gd
@@ -28,7 +28,7 @@ func setup() -> void:
 
 func command(id: StringName, payload: Dictionary) -> bool:
 	var result: CommandResult = runtime.submit_command(id, payload)
-	expect(result.is_success(), String(id) + ": " + String(result.code))
+	expect(result.is_success(), String(id) + ": " + str(result.code))
 	expect(stream.record("command", {&"command": id, &"payload": payload,
 		&"result": result.to_dictionary(), &"minute": clock.absolute_minute}), "record public command")
 	return result.is_success()