My job scheduled me for times I’m in an exam

I am only 16 and work at a shoe store. This is my first ever job. I’ve only been here for two weeks. I gave my two weeks notice because of this because it’s a “schedule blackout” period so they can’t move my schedule at all, but the notice isn’t before my exam so they’ll expect me there. Do I just not show up? I’ve already quit and honestly I’m not going to put the job on my resume so I’m tempted to just leave cold turkey. I am mid applying to colleges and cannot put my grades at risk.

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