PHPUnit Cannot open file "XXXTest" Follow

Hello, I've been trying to set up a phpstorm with phpunit but I have trouble to make it work when I'm trying to run a test file or anything inside that test file.

Running test on a directory is fully working.

Here is the file

<?php

use PHPUnit\Framework\TestCase;

class InsertTest extends TestCase
{
    public function testName() {
        Application::getInstance(); //To check if autoloader is ok
        $this->assertTrue(true);
    }
}

Running tests (right click) on a directory generates this command (which works just fine):

C:\wamp64\bin\php\php7.3.15\php.exe C:\wamp64\www\gc_h5_copy\phpunit.phar --bootstrap C:\wamp64\www\gc_h5_copy\tests\boostrap.php --no-configuration C:\wamp64\www\gc_h5_copy\tests\php7.3\core --teamcity
PHPUnit 9.0.1 by Sebastian Bergmann and contributors.




Time: 2.7 seconds, Memory: 20.00 MB

OK (1 test, 1 assertion)

Instead, running just the test file produces an error cannot find "InsertTest"

Testing started at 16:59 ...
C:\wamp64\bin\php\php7.3.15\php.exe C:\wamp64\www\gc_h5_copy\phpunit.phar --bootstrap C:\wamp64\www\gc_h5_copy\tests\boostrap.php --no-configuration InsertTest C:\wamp64\www\gc_h5_copy\tests\php7.3\core\InsertTest.php --teamcity
PHPUnit 9.0.1 by Sebastian Bergmann and contributors.

Cannot open file "InsertTest".

Process finished with exit code 1

To me, it seems like "InsertTest" in the last command shoudln't be there but it might be an autoloader issue, I don't know. The autoloader I'm using in my test is working my class just fine in folder mode.