Can't run laravel artisan command in the unit test

I have Laravel framework v5.8.29.

And I can't run artisan command in a unit test either using $this->artisan() nor Artisan::call().

migrate command prints absolutely nothing.

It seems like the command just even was not called!

But it works pretty well if I call the command from the system, using php artisan migrate.

Example: https://travis-ci.com/github/CaliforniaMountainSnake/laravel-database-test-case/builds/171804872

As you can see, at first I call php artisan migrate directly and it works as expected. But then I call the same command from the unit test and it just doesn't work. A second time I call migrate command with another empty database, so the first call doesn't affect the second (You can see the proof of that, TABLES of "test_mysql" returns nothing).

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