Undefined constant "CodeIgniter\Test\SUPPORTPATH" while testing at GitLab

I had the same issue and i found out that i had not set the "Test Frameworks" on my IDE settings.

To do this on my project (using PhpStorm) i set the path with the value:

Code:

"[PATH_OF_MY_PROJECT]\htdocs\vendor\autoload.php"

on: Settings -> PHP-> Test Frameworks-> Use Composer autoloader -> Path to script and click OK.