Run testers on local machine

I have noticed that the testers for challenges are open sourced, so I would like to know how to run the testers on my local machine . A tutorial would be helpful .

@neerajnangiredddy Running the tests locally can be quite cumbersome, so we recommend using our test runners for a smoother and more efficient experience.

I can’t afford for the subscription.
So, I would like to go through the cumbersome process.

Feel free to refer your friends to earn access to paid stages.

I have already done that and the free week is expiring soon.
If you know how to run testers on local machine please share.