Проблема с запуском тестов Codeception в Docker

инструменты codeception
,
#1

У меня проблемка, приложение запущено в докере, тесты тоже запускаю в докере.
Тесты и webdriver запускаются в docker-compose.
Сама проблема: [ConnectionException] Can't connect to Webdriver at http://127.0.0.1:4444/wd/hub. Please make sure that Selenium Server or PhantomJS is running.

Dockerfile:

FROM php:7.1-cli

# Install required system packages
RUN apt-get update && \
    apt-get -y install \
            git \
            zlib1g-dev \
            libssl-dev \
            wget \
        --no-install-recommends && \
        apt-get clean && \
        rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

# Install php extensions
RUN docker-php-ext-install \
    bcmath \
    zip

# Install pecl extensions
RUN pecl install \
        mongodb \
        xdebug-2.6.0beta1 && \
    docker-php-ext-enable \
        mongodb.so \
        xdebug

# Configure php
RUN echo "date.timezone = UTC" >> /usr/local/etc/php/php.ini

# Install composer
ENV COMPOSER_ALLOW_SUPERUSER=1
RUN curl -sS https://getcomposer.org/installer | php -- \
        --filename=composer \
        --install-dir=/usr/local/bin
RUN composer global require --optimize-autoloader \
        "hirak/prestissimo"

# Prepare host-volume working directory
RUN mkdir /project
WORKDIR /project

# Install vendor
COPY ./composer.json /project/composer.json
RUN composer install --prefer-dist --optimize-autoloader

docker-compose.yml

version: '2'
services:
    codecept:
        depends_on:
            - chrome
        build:
            context: ./
        volumes:
            - ./tests:/project/tests
            - ./codeception.yml:/project/codeception.yml
        restart: 'no'
        networks:
            - default
            - proxy
        environment:
            - SCP_GUI_URL=http://scp_gui_nginx
        entrypoint:
            - ./vendor/bin/codecept
#            - run

    chrome:
        image: selenium/standalone-chrome
        ports:
            - '4444'
            - '5900'
        networks:
            - default
            - proxy

networks:
    default:
        driver: bridge
    proxy:
        external:
            name: traefik_webgateway

codeception.yml

# suite config
suites:
    acceptance:
        actor: AcceptanceTester
        path: .
        modules:
            enabled:
                - WebDriver:
                    url: '%SCP_GUI_URL%'
                    browser: chrome
                    port: 4444
                    window_size: maximize
                - \Helper\Acceptance
                - Asserts

extensions:
    enabled:
      - Codeception\Extension\RunFailed
      - Codeception\Extension\Teststatistics
      - Codeception\Extension\Logger

params: 
    - env

gherkin: []    

# additional paths
paths:
    tests: tests
    output: tests/_output
    data: tests/_data
    support: tests/_support
    envs: tests/_envs

settings:
    shuffle: false
    lint: true
#2

Вопрос решен
Надо было добавить в codeception.yml опцию

modules:
   enabled:
     - WebDriver:
         host: chrome //название контейнера браузера