Testing a multi tenant app with dynamic routes

Hi, I built a multi tenant Laravel application with multiple domains. The current tenant is resolved through request()->getHost()

Some of the domains share a couple of routes, as they are very similar websites. But some domains have their own custom routes, which overwrite the shared routes:

Route::domain('{job_board?}')
    ->group(function () {
        // Import the shared routes.
        Route::name('job-board.')->group(base_path('routes/job-boards/shared.php'));
        
        // Import the specific tenant routes.
        if (file_exists(base_path(sprintf('routes/job-boards/tenants/%s.php', tenant()->slug)))) {
            Route::name('job-board.')->group(base_path(sprintf('routes/job-boards/tenants/%s.php', tenant()?->slug)));
        }
    });

This all works fine on the server. But when running tests, the value of request()->getHost() is always set to the APP_URL value of the .env.testing file. So it doesn't load the dynamic routes, and tests of the tenant domains fail with a 404:

it('shows the tenant X home page')
    ->get('https://tenant-x.test')
    ->assertOk()

Any idea how to solve this, or how to structure the routes in a way this will work?

Things I've tried:

• Sending a HTTP_HOST header along with the get() request
• Set the APP_URL to the tenant's URL: config(['app.url' => 'https://tenant-x.test']); inside the test
• Define the dynamic routes in the RouteServiceProvider
• Overwriting the $GLOBALS['_ENV']['APP_HOST'] value
• lots of other 'hacky' stuff...