Laravel - Getting Started - Parallel Testing And Databases

Laravel automatically handles creating and migrating a test database for each parallel process that is running your tests. The test databases will be suffixed with a process token which is unique per process. For example, if you have two parallel test processes, Laravel will create and use your_db_test_1 and your_db_test_2 test databases.

By default, test databases persist between calls to the test Artisan command so that they can be used again by subsequent test invocations. However, you may re-create them using the --recreate-databases option:

    php artisan test --parallel --recreate-databases