Tests are hanging in Lumen

Just started new tests in Lumen API, it hangs when I run it with

vendor/bin/phpunit tests/ApiIntegrationTest.php

Very simple test so far:

<?php

 use Laravel\Lumen\Testing\DatabaseMigrations;
use Laravel\Lumen\Testing\DatabaseTransactions;

class ApiIntegrationTest extends TestCase
{
   use DatabaseMigrations;

    /** @test */
    public function get_benefits_list()
    {
        $benefits = factory(\App\Benefit::class, 50)->create();
        $this->json('get', '/api/benefits')->assertStatus(200);
   }

}

phpunit.xml setup is

     <env name="APP_ENV" value="testing"/>
    <env name="DB_CONNECTION" value="sqlite"/>
    <env name="DB_DATABASE" value=":memory:"/>

config/database simply

        'sqlite' => [
          'driver' => 'sqlite',
          'database' => env('DB_DATABASE', database_path('database.sqlite')),
           'prefix' => '',
        ],

Can anyone see anything glaring ? How do I even debug what is wrong as nothing is in the logs at all ?