When can I have my next Laser Hair Removal treatment after sun exposure on holiday (time length)? - thanks!

I got back from holiday and was very hot but because of ongoing treatments, did not tan myself and kept consistent with sun cream. I'm back but when can I have next treatment. It's on my face so there was some sun exposure, but how long must I wait. (I'm also not visibly tanned on the treatment area. The laser centre said I must wait 2weeks for testpatch and then a month, and it seems a while to wait and this would ruin the treatment cycle too and I'd pluck while I wait making cycle worse off.