def METHOD_NAME(
    self,
    app: Flask,
    with_db_and_bpmn_file_cleanup: None,
) -> None:
    process_model = load_test_spec(
        "test_group/call_activity_nested",
        process_model_source_directory="call_activity_nested",
        bpmn_file_name="call_activity_nested",
    )
    bpmn_file_names = [
        "call_activity_level_2b",
        "call_activity_level_2",
        "call_activity_level_3",
    ]
    for bpmn_file_name in bpmn_file_names:
        load_test_spec(
            f"test_group/{bpmn_file_name}",
            process_model_source_directory="call_activity_nested",
            bpmn_file_name=bpmn_file_name,
        )
    process_instance = self.create_process_instance_from_process_model(process_model)
    processor = ProcessInstanceProcessor(process_instance)
    processor.do_engine_steps(save=True, execution_strategy_name="greedy")
    assert process_instance.status == "complete"