Test spot for microblading removal turned darker - hasn't faded much in the last 6 months.

I've had microblading on my eyebrows for 7 years that faded to a greyish color and haven't disappeared. About 6 months ago, I visited a dermatologist who used a laser that I can't remember to do a test spot. The spot darkened and hasn't faded much since then. Is this normal/ok, will further sessions resolve this? I have read that darkening to a black/gray is better than it turning red or yellow or something, but my concern is that it hasn't really faded since darkening.