Laravel + phpunit + github actions = Failed asserting that '1' is identical to 1

laravel testing continuous-integration phpunit github-actions

PHP Snippet 1:

class SomeModel extends Model
{
    use HasFactory;

    /**
     * The attributes that should be cast.
     *
     * @var array
     */
    protected $casts = [
        'user_id' => 'integer',
    ];
}