Test possibly postponed...

I may not be here tomorrow, Friday, November 30. I've told the kids today, that if I am not here tomorrow, that their science test will be postponed until Monday, December 3. I told them there's a 50% chance they'll have their test tomorrow (if I'm here) and 50% chance they will have their test Monday (if I'm NOT here). I do not want to leave a unit test for a sub to give to the kids. The kids always have questions to ask me throughout a test and I do not want to absent for that and not get their questions answered. I told the kids to study and be prepared for tomorrow in case they have their test. It is also their responsibility to study over the weekend if it is moved to Monday.