Sue has great suggestions (as always). I used the kitty burrito for about a week til Gypsy calmed down.
Honestly, I think what worked best for us was having a test spot. A towel on the kitchen floor. She never liked testing but she knew in that spot she had to hold still and a treat would immediately follow. She also figured out that meals followed morning and evening test and she wanted those!
I'd always test in one place, always treat even if the test doesn't work. And just stay super calm. They can feel your stress and react to it. If you're calm, they usually are. And don't forget a treat for you after too!