framework: route() helper function does not work well in artisan commands

In Laravel 5.2.39, my app has

.env

APP_URL=http://dev.env/smartbots

config/app.php

'url' => env('APP_URL'),

app/Http/routes.php

Route::get('test', function () {
    dd(route('twilioVoiceRequest'));
});

Route::get('/twilio-voice-request', function() {
})->name('twilioVoiceRequest');

Artisan command (twilio:setup)

public function handle()
{
    dd(route('twilioVoiceRequest'));
}

This is what i got from test route

and from php artisan twilio:setup