User blog comment:Sir Aether/PreGen: Plot Discussion/@comment-25156300-20150131212119/@comment-25156300-20150201010931

The 'before sundown' part was in the original idea, yes. But she also said the whole test seemed like it was missing something. So either there's something that happens when they regroup before leaving or they don't actually get out by then and do the survival thing.

To get out by sundown, I don't think there'd be enough time to learn a survival lesson, so some other lesson would be needed. The only other thing I can think of at the moment it Cho Li transforming and attacking (like Iruka did to test the rookie 9 before the chunin exams). I guess that would be a 'fighting as a team' lesson.