Tests Failing on GitHub Actions

Hey there.

Tests passing locally, but failing on Github Actions. I've looked everywhere, don't know why. Thing is, the failing on Github kind of make sense and therefore the passing locally is a bit strange. So I'm running my test using SQLite, with a proper database, not the memory one.

phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
         bootstrap="vendor/autoload.php"
         colors="true"
>
    <testsuites>
        <testsuite name="Unit">
            <directory suffix="Test.php">./tests/Unit</directory>
        </testsuite>
        <testsuite name="Feature">
            <directory suffix="Test.php">./tests/Feature</directory>
        </testsuite>
    </testsuites>
    <php>
        <server name="APP_ENV" value="testing"/>
        <server name="BCRYPT_ROUNDS" value="4"/>
        <server name="CACHE_DRIVER" value="array"/>
        <server name="DB_CONNECTION" value="sqlite"/>
        <server name="DB_DATABASE" value="database/database.sqlite"/>
        <server name="MAIL_MAILER" value="array"/>
        <server name="QUEUE_CONNECTION" value="sync"/>
        <server name="SESSION_DRIVER" value="array"/>
        <server name="TELESCOPE_ENABLED" value="false"/>
    </php>
</phpunit>

laravel.yml for Github Action:

name: Laravel

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  laravel-tests:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Setup PHP
      uses: shivammathur/setup-php@v2
      with:
        php-version: 7.4.10 # Change to the php version your application is using
        extensions: mbstring, bcmath # Install any required php extensions
    - name: Copy .env
      run: php -r "file_exists('.env') || copy('.env.example', '.env');"
    - name: Install Dependencies
      run: composer install
    - name: Generate key
      run: php artisan key:generate
    - name: Directory Permissions
      run: chmod -R 777 storage bootstrap/cache
    - name: Create Database
      run: |
        mkdir -p database
        touch database/database.sqlite
    - name: Execute tests (Unit and Feature tests) via PHPUnit
      env:
        DB_CONNECTION: sqlite
        DB_DATABASE: database/database.sqlite
      run: vendor/bin/phpunit --testdox

Test that fails on Github:

class UserTest extends TestCase
{
    use RefreshDatabase;
    
    /** @test */
    public function it_should_update_a_user()
    {
        // With only that line I get the error
        $user = User::factory()->create();
    }
}

Error thrown:

General error: 1 Cannot add a NOT NULL column with default value NULL (SQL: alter table "links" add column "user_id" integer not null)

So I understand why SQLite would be complaning about that. You can't alter a table with default null columns. Fine. But then why is it passing locally???

Any help you be greatly appreciated.