If I was Nick's PO I would call him in for a usual random test during month 2or3 of his probation and when he gets there inform him:
"Oh by the way we are doing an hair follicle test this time."
Checked some rules/laws on this in Minnesota and they can do this if they want to. (and they have increased amounts of hair follicle tests on people in probation since 2019 state wide)
It's more expensive than piss tests of course, but it would be a FUNNY and WEIRD surprise on the limpdick junkie. Drugs can show up in your hair for up to 3 months.

:
"YOU CAN'T FUCKING DO THAT YOU ABUSIVE CUNT WHORE!!!1!1!"