<?php

namespace Tests\Feature;

use Tests\TestCase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Foundation\Testing\RefreshDatabase;

class MemberRegTest extends TestCase
{
    /**
     * A basic test example.
     *
     * @return void
     */
    public function testExample()
    {
       $response = $this->call('GET', '/addmember');
      $response = $this->action('GET', 'MemberController@addmember');

    }
}

Após o teste me dá erro

Erro: ligue para o método indefinido Tests \ Feature \ MemberRegTest :: action ()

O que eu faço de errado?