Travis CI: Split Builds from PHPUnit and Laravel Dusk

I would like to set up a testing scenario where, I can separate the test-builds for phpunit and laravel dusk. The reason why is, tahat this I would like to run different .env & phpunit.xml files for each test-approach.

1. Set the environment for PHPUnit
2. Test PHPUnit
3. Clean the Travis Build
4. Set the environment for Laravel Dusk
5. Test Laravel Dusk

I've went through the Travis documentation about jobs and the matrix but I cant find a proper approach which I can follow.

my .travis.yml

    sudo: true

    dist: trusty

    language: php

    php:
      - 7.3

    addons:
      chrome: stable
      apt:
        sources:
          - mysql-5.7-trusty
        packages:
          - mysql-server
          - mysql-client

    services:
      - mysql

    install:
      - composer self-update
      - travis_retry composer install --no-interaction --prefer-dist --no-suggest

    before_script:
      - rm composer.lock
      - echo -e "[server]\nmax_allowed_packet=64M" | sudo tee -a /etc/mysql/conf.d/drupal.cnf
      - sudo service mysql restart
      - mysql -e 'CREATE DATABASE testing;'
      - mysql -e 'CREATE DATABASE business_external;'
      - mysql business_external < /home/travis/build/StanBarrows/business/database/data/business_external
      - google-chrome-stable --headless --disable-gpu --remote-debugging-port=9222 http://localhost &
      - cp .env.travis .env
      - cp phpunit.travis.xml phpunit.xml
      - php artisan key:generate
      - php artisan storage:link
      - php artisan serve &

    script:
      - vendor/bin/phpunit
      - php artisan dusk

    notifications:
      email: false