How to add Laravel HTTP-Tests to a PHP package?

Question

I am creating a PHP package, with Composer for when it is finished being published in Packagist.

This package consists of many requests in other Apis, in case I am using the Guzzle.

To perform the tests on phpunit to help test the JSON structure, I found this package on github, but even in tests that return a small JSON, the code is pretty "boring" to do.

I’m a little more familiar with projects Laravel, so I wonder if anyone knows any way to add to this package a development dependency only for the part of HTTP-Tests of Laravel, or at least the entire testing part, without inserting more than this.

I have already done a research in the documentation of Laravel and a little on Stackoverflow, but so far I found nothing. If anyone knows, I’d appreciate it.