<?php

/**
 *    Copyright 2015-2017 ppy Pty. Ltd.
 *
 *    This file is part of osu!web. osu!web is distributed with the hope of
 *    attracting more community contributions to the core ecosystem of osu!.
 *
 *    osu!web is free software: you can redistribute it and/or modify
 *    it under the terms of the Affero GNU General Public License version 3
 *    as published by the Free Software Foundation.
 *
 *    osu!web is distributed WITHOUT ANY WARRANTY; without even the implied
 *    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *    See the GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with osu!web.  If not, see <http://www.gnu.org/licenses/>.
 */
use Illuminate\Foundation\Testing\DatabaseTransactions;

class TestCase extends Illuminate\Foundation\Testing\TestCase
{
    use DatabaseTransactions;

    protected $connectionsToTransact = [
        'mysql',
        'mysql-store',
    ];

    protected $baseUrl = 'http://localhost';

    /**
     * Creates the application.
     *
     * @return \Illuminate\Foundation\Application
     */
    public function createApplication()
    {
        $app = require __DIR__.'/../bootstrap/app.php';

        $app->make('Illuminate\Contracts\Console\Kernel')->bootstrap();

        return $app;
    }
}

<?php

/**
 *    Copyright 2015-2017 ppy Pty. Ltd.
 *
 *    This file is part of osu!web. osu!web is distributed with the hope of
 *    attracting more community contributions to the core ecosystem of osu!.
 *
 *    osu!web is free software: you can redistribute it and/or modify
 *    it under the terms of the Affero GNU General Public License version 3
 *    as published by the Free Software Foundation.
 *
 *    osu!web is distributed WITHOUT ANY WARRANTY; without even the implied
 *    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *    See the GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with osu!web.  If not, see <http://www.gnu.org/licenses/>.
 */
use Illuminate\Foundation\Testing\DatabaseTransactions;

class TestCase extends Illuminate\Foundation\Testing\TestCase
{
    use DatabaseTransactions;

    protected $connectionsToTransact = [
        'mysql',
        'mysql-chat',
        'mysql-mp',
        'mysql-store',
        'mysql-updates',
    ];

    protected $baseUrl = 'http://localhost';

    /**
     * Creates the application.
     *
     * @return \Illuminate\Foundation\Application
     */
    public function createApplication()
    {
        $app = require __DIR__.'/../bootstrap/app.php';

        $app->make('Illuminate\Contracts\Console\Kernel')->bootstrap();

        return $app;
    }
}

Add more databases for transaction thingy
Add more databases for transaction thingy
