Never read anything about Nima recommending not testing spices, didn't know that. At Nima, they seem to be testing spices themselves. They just recommend to dilute it with some water.
https://nimasensor.com/2017/05/09/gluten-free-spices-grains-flours-nima-testing/
https://nimasensor.com/nima-testing/
I've been on a gluten-free diet since 2...