Do other people think you are a nice person? Can you pass the nice test?
Find someone you see every day. Could be a spouse, a child, a friend, a co-worker. This time when you see them, make it a point to compliment them about something. Anything. Maybe her hair looks nice today. Maybe he’s wearing a handsome sweater. Just make it positive.
Take note of their reaction. If they act surprised, it means they’re not used to compliments from you. You failed the nice test. However, if they just smile and say “thank you”, it indicates they are accustomed to your thoughtfulness. You passed.