If I said I was going to take a subject test on my UC application, do I have to send it?

Hey everyone,
So on my UC application I said I was going to take a subject test in December. I got my score today and I am not happy with it. Do I still have to send it to the UCs? (I know subject tests aren’t required but if I’m worried that if I put it down on my app, they’ll require me to send the score.)