<p>If you fail, then you take a swimming class for PE requirement.</p>
<p>If you cannot pass the test for medical/psychological reasons, then they'll let you take a first-aid class or else find you an appropriate substitute to fulfill your PE requirement.</p>
<p>If you fall ill on the test day, then you can request to have it on another day. I can't remember if you have to pay extra or not for that.</p>