Working example on how to use SQLite with a Laravel 6.x installation.

Laravel 6.x Github Action with SQLite

name: Unit tests

on: [push]

jobs:
  phpunit-tests:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v1
    - name: Copy .env
      run: php -r "file_exists('.env') || copy('.env.example', '.env');"
    - name: Install dependencies
      run: composer install -q --no-ansi --no-interaction --no-scripts --no-suggest --no-progress --prefer-dist
    - name: Generate key
      run: php artisan key:generate
    - name: Create SQLite database
      run: |
        mkdir -p database
        touch database/database.sqlite
    - name: Run migrations
      env:
        DB_CONNECTION: sqlite
        DB_DATABASE: database/database.sqlite
      run: php artisan migrate
    - name: Execute tests via PHPUnit
      env:
        DB_CONNECTION: sqlite
        DB_DATABASE: database/database.sqlite
      run: vendor/bin/phpunit