Entitled students often are not used to having boundaries set for their behavior, so it is essential to be clear and consistent in myclassroom. Develop rules that everyone must follow ( such as the test should be taken at the decided time) , and scme up with these as a class and require everyone to agree to them. Create consequences and enforce them—no exceptions,and explain that this is a community in which all are equals, so no one is above the rules.
Then I will ask him to reschedule his appointment with his father for  another time; because he should take the test with all other students unless he has a really emergency situation, and will not show him any interest in his family situation. 
 
If he insists on moving forward with his test for a few weeks, I will ask to involve his parents to solve the situation, by getting them on board to told them how important is to teach their kids to respect the rules and how they can help to let their kid have the test on it’s time or he will failed in the test, and if they refuse to collaboration i will follow the rules and will not give up my stand. 
 
 
 
 
 
 
