$1 or $1 are both possible options depending on the type of test though you may not feel comfortable with either. If the procedure is simple and relies only on a colour change then perhaps $1 might work.

huh. this has never occurred to me, but damn that's something that is needed. I would crosspost to r/Psychonaut. More people there who are knowledgeable about testing and taking hallucinogens will see your question and could give you better insight. They're a friendly bunch. They might not know about accessibility but they'll be able to explain the test, instructions, and how it's read.

It’s not the liquid that changes colour, it’s the lines on the strip that tells you a positive, negative or inconclusive. Unless your drug test kit is entirely different, but I have not heard of a test like that. Anyway, if you’re testing LSD, from my understanding, like how they test cannabis, they test the metabolites. LSD metabolites can last for up to five days. I’m not sure if that’s only a one off or even after abuse.