// In your config/database.php bellow mysql add:  'mysql_testing' => [ 'driver' => 'mysql', 'host' => env('TESTING_DB_HOST', 'localhost'), 'database' => env('TESTING_DB_DATABASE', 'forge'), 'username' => env('TESTING_DB_USERNAME', 'forge'), 'password' => env('TESTING_DB_PASSWORD', ''), 'charset' => 'utf8', 'collation' => 'utf8_unicode_ci', 'prefix' => '', 'strict' => false, ],  //And now in your .env add the values for:  TESTING_DB_HOST=localhost TESTING_DB_DATABASE=homestead_testing TESTING_DB_USERNAME=homestead TESTING_DB_PASSWORD=secret  // Now you can run  php artisan migrate —database=mysql_testing // And the last thing - open your phpunit.xml file in the app folder and add this:    <env name="DB_CONNECTION" value="mysql_testing"/>  

Read more of this post