Anxiety during coding interview

I choke when asked to pair during a coding interview. The interviewer could ask me the simplest question and my mind goes blank. I think I'm a good developer and if I was given the task at home with no pressure, I'd pass the test.

I know practice should help me with it, and I do lots of that; it doesn't help as it doesn't recreate the actual interview setting.

Anyone any advice on managing this?