Using custom skeleton throws an Error: Class 'MyAppName\Api\Extensions\Passwords\PasswordResetServiceProvider' not found

[lbrutti]

• Testbench Version: 6.0
• Laravel Version: 8.74
• PHP Version: 7.3
• Database Driver & Version: not needed for this issue

Description:

I set up a custom skeleton path as follow:

    /**
     * Get Application base path.
     *
     * @return string
     */
    public static function applicationBasePath()
    {
        //assigned to variable only for debugging purposes
        //if not, __DIR__ variable values in not consinstent when
        //inspected in the debugger console
        $dir = __DIR__ . "/../../custom_skeleton";
        return $dir;
    }

As soon as I run php vendor/bin/phpunit the following error stack is displayed:

1) MyPackage\Tests\Unit\Customer\CustomerTest::test_must_have_a_name

Error: Class 'Api\Extensions\Passwords\PasswordResetServiceProvider' not found

/home/myuser/repos/my-package/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php:208
/home/myuser/repos/my-package/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php:144
/home/myuser/repos/my-package/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php:61
/home/myuser/repos/my-package/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:659
/home/myuser/repos/my-package/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/RegisterProviders.php:17
/home/myuser/repos/my-package/vendor/orchestra/testbench-core/src/Concerns/CreatesApplication.php:333
/home/myuser/repos/my-package/vendor/orchestra/testbench-core/src/Concerns/CreatesApplication.php:220
/home/myuser/repos/my-package/vendor/orchestra/testbench-core/src/TestCase.php:76
/home/myuser/repos/my-package/vendor/orchestra/testbench-core/src/Concerns/Testing.php:81
/home/myuser/repos/my-package/vendor/orchestra/testbench-core/src/TestCase.php:44
/home/myuser/repos/my-package/tests/TestCase.php:35
phpvfscomposer:///home/myuser/repos/my-package/vendor/phpunit/phpunit/phpunit:97

I changed the package and skeleton name for policy, but the error is the same.
The Api\Extensions\Passwords\PasswordResetServiceProvider is a custom provider I implemented within the the skeleton app folder and it is loaded in the skeleton app `config\app.php' file:

    'providers' => [
        Illuminate\Notifications\NotificationServiceProvider::class,
        Illuminate\Pagination\PaginationServiceProvider::class,
        Illuminate\Pipeline\PipelineServiceProvider::class,
        Illuminate\Queue\QueueServiceProvider::class,
        Illuminate\Redis\RedisServiceProvider::class,
        // Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
        Api\Extensions\Passwords\PasswordResetServiceProvider::class,
        Illuminate\Session\SessionServiceProvider::class,
        Illuminate\Translation\TranslationServiceProvider::class,
        Illuminate\Validation\ValidationServiceProvider::class,
        Illuminate\View\ViewServiceProvider::class,
        Laravel\Tinker\TinkerServiceProvider::class,
    ]

I read the troubleshooting section Why Testbench doesn't include any of the App classes. but i don't understand if this is related or not:
such missing class is inside the skeleton app folder, i just renamed the namespace to avoid using the app one.

Steps To Reproduce:

• use a custom skeleton
• in skeleton's config/app.php load a provider whose implementation is insided the skeleton's app folder
• run phpunit tests in the package

[crynobone]

Does your package autoloads your custom skeleton using Composer?