I went to the hospital two counties over (where I get ECT) to get the COVID test done before the ECT. So I walk in, they sit me down, shove a long cotton swab up my nose (both sides), and I'm free to go.

By the way, I don't recommend getting that test done if you're not already showing symptoms. It's not something you'd do for grins and giggles. Obviously, if your primary says you need to do it then you should follow professional recommendations.