To disable caching while testing your JSON:API endpoints you should put this into your settings.php

$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';

but for this to work, you need to define this service null, which should be added as

There are 2 system in drupal 7 for IP blocking, one is flood blocking that is used on login and other is 
system_block_ip_action that is storing IP's in blocked_ips table and checking them while bootstrapping.

For selenium there is also selenium command runner, called selenium side runner, as I pointed out some tips about how to use NEW Selenium IDE here, here are tips on how to use it with CLI or with some CI/CD.

As it is often referred online as "new selenium IDE 2019" lets sum up some tips how to use it. It can record your actions and put them in its UI, but you will often need to change it and refine it to get something useful.

For this to understand you will need to already have installed and running PhantomJS, how to do that please read here.
https://github.com/Gizra/KnowledgeBase/wiki/Behat-phantomJs-install

With that you will need to run it, open your terminal and write this to make it start

With drush driver for behat you will have some more power, basically drush power to do things. So to make out first drush test, you will need to bring some change in behat.yml file and change some lines.

This just another simple test for behat and mink combo with plain blackbox driver. To log in to a site and do check some behavior you can write this simple test, again no PHP needed for it. You will be logged in and checking what is on people admin page. Add it to your some.feature file and run behat.
 

There is not much documentation and examples of drupal with behat test, so I will start with simplest. I will assume you have installed