The Task Scheduling feature should be working properly in Ravel, but it does not work.

Running scheduled command: '/usr/bin/php' 'artisan' command:quiz>'/dev/null'2>&1

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
useApp\Quiz;

class TimeQuiz extensions Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature='command:quiz';

    /**
     * The console command description.
     *
     * @var string
     */
    protected$description='TimeQuiz';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function__construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $quiz=Quiz::with('answer')
            ->inRandomOrder()
            ->get();

            return$quiz;
    }
}

<?php

namespace App\Console;

use Illuminate\Console\Scheduling\Schedule;
use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
use Illuminate\Support\Facades\Log;

class Kernel extensions ConsoleKernel
{
    /**
     * The Artisan commands provided by your application.
     *
     * @var array
     */
    protected $commands = [
        'App\Console\Commands\TimeQuiz'
    ];

    /**
     * Define the application's command schedule.
     *
     * @param\Illuminate\Console\Scheduling\Schedule$schedule
     * @return void
     */
    protected function schedule (Schedule$schedule)
    {
        $schedule->command('command:quiz')
        ->everyMinute()
        ->onSuccess(function(){
            Log::info('success');
        });
    }