Maybe i'm crazy but i don't find when the playtest end

So, from what I've read from EA, this playtest is essentially the lead into the Early Access release. So anyone in the playtest will be able to play until the early access release. Which you can still continue to play. So you're good forever!

Depending on which one you are in it maybe until early access.

Thank you !!! so much, can i ask you if we can play together ? 

What are you playing on?