Problem running Laravel Dusk test in Travis

Hello everyone, I'm trying to get Travis to run the Dusk test, but I always get an error. The tests work well on my local environment, but when Travis run the Test I get an error like this: NoSuchElementException: no such element: Unable to locate element:

Travis configuration:

sudo: required
language: php
dist: trusty

php:
  - 7.1

install:
  - cp .env.travis .env
  - travis_retry composer install --no-interaction --prefer-dist --no-suggest

before_script:
    - export DISPLAY=:99.0
    - mysql -e 'create database test;'
    - sh -e /etc/init.d/xvfb start
    - google-chrome-stable --headless --disable-gpu --remote-debugging-port=9222 http://localhost:8000 &
    - ./vendor/laravel/dusk/bin/chromedriver-linux &
    - php artisan serve > /dev/null 2>&1 &

script:
    - php artisan dusk

.env.travis

APP_NAME=Laravel
APP_ENV=local
APP_KEY=base64:30ZWK9OIZNC68ySA163UzSBRC1ckdgk5TZjr9hyHQ+A=
APP_DEBUG=true
APP_LOG_LEVEL=debug
APP_URL=http://localhost:8000

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=test
DB_USERNAME=root
DB_PASSWORD=

CACHE_DRIVER=array
SESSION_DRIVER=array
QUEUE_DRIVER=sync

MAIL_DRIVER=log