Docker-composeのrailsアプリのtravisCIでの結合テストエラー

前提・実現したいこと

docker上で作成したrailsアプリのテストをtravisCIと連携して行っているのですが、
モデルの単体テストはうまくいくものの、結合テストの実施でエラーが出ています。
※ローカル上ではすべてのテストが問題なく実行されています。

発生している問題・エラーメッセージ

travisCI上のエラーは膨大な量のため一部を載せます。
エラーが出ているのは、画面上で何らかの要素を取得・入力などする場合です。

Failures:
  1) 投稿 新規投稿ができる時 ログインしたユーザーはレシピの新規投稿ができる
     Failure/Error: fill_in 'login_email', with: @user.email
     
     Capybara::ElementNotFound:
       Unable to find field "login_email" that is not disabled
     
     
     
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:303:in `block in synced_resolve'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/base.rb:83:in `synchronize'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:292:in `synced_resolve'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:53:in `find'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/actions.rb:91:in `fill_in'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/session.rb:768:in `block (2 levels) in <class:Session>'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/dsl.rb:58:in `block (2 levels) in <module:DSL>'
     # ./spec/support/sign_in_support.rb:7:in `sign_in'
     # ./spec/system/recipes_spec.rb:12:in `block (3 levels) in <main>'
  2) 詳細 ログインしたユーザーは詳細ページに遷移してコメント投稿欄・コミュニケーション欄が表示される
     Failure/Error: fill_in 'login_email', with: @user.email
     
     Capybara::ElementNotFound:
       Unable to find field "login_email" that is not disabled
     
     
     
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:303:in `block in synced_resolve'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/base.rb:83:in `synchronize'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:292:in `synced_resolve'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/finders.rb:53:in `find'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/node/actions.rb:91:in `fill_in'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/session.rb:768:in `block (2 levels) in <class:Session>'
     # /usr/local/bundle/gems/capybara-3.34.0/lib/capybara/dsl.rb:58:in `block (2 levels) in <module:DSL>'
     # ./spec/support/sign_in_support.rb:7:in `sign_in'
     # ./spec/system/recipes_spec.rb:54:in `block (2 levels) in <main>'
  3) 詳細 ログインしていないユーザーは詳細ページに遷移できるがコメント投稿欄・コミュニケーション欄は表示されない
     Failure/Error: expect(page).to have_content("#{@recipe.title}")
       expected to find text "test-title" in "Sprockets::FileNotFound at /recipes/21 ====================================== couldn't find file 'trix/dist/trix' with type 'text/css' Checked in these paths: /screpi/app/assets/config /screpi/app/assets/images /screpi/app/assets/stylesheets /usr/local/bundle/gems/actioncable-6.0.3.4/app/assets/javascripts /usr/local/bundle/gems/activestorage-6.0.3.4/app/assets/javascripts /usr/local/bundle/gems/actionview-6.0.3.4/lib/assets/compiled /usr/local/bundle/gems/turbolinks-source-5.2.0/lib/assets/javascripts /screpi/node_modules > To access an interactive console with this error, point your browser to: /__better_errors app/assets/stylesheets/actiontext.scss, line 6 ---------------------------------------------- ``` ruby 1 // 2 // Provides a drop-in pointer for the default Trix stylesheet that will format the toolbar and 3 // the trix-editor content (whether displayed or under editing). Feel free to incorporate this 4 // inclusion directly in any other asset bundle and remove this file. 5 // > 6 //= require trix/dist/trix 7 8 // We need to override trix.css’s image gallery styles to accommodate the 9 // element we wrap around attachments. Otherwise, 10 // images in galleries will be squished by the max-width: 33%; rule. 11 ``` App backtrace ------------- - app/assets/stylesheets/actiontext.scss:6:in `' - app/views/shared/_top-content.html.erb:15:in `_app_views_shared__top_content_html_erb___3840752795268377587_47139238910780' - app/views/recipes/show.html.erb:2:in `_app_views_recipes_show_html_erb__162942296445914804_47139253700140' - spec/system/recipes_spec.rb:72:in `block (2 levels) in ' Full backtrace -------------- - app/assets/stylesheets/actiontext.scss:6:in `' - sprockets (3.7.2) lib/sprockets/resolve.rb:65:in `resolve!' - sprockets (3.7.2) lib/sprockets/directive_processor.rb:399:in `resolve' - sprockets (3.7.2) 
# 中略
     # ./spec/system/recipes_spec.rb:75:in `block (2 levels) in <main>'

これ以降も同様のエラーが続きます。

.travis.yml

sudo: required

env:
  - DOCKER_COMPOSE_VERSION=1.27.4

before_install:
  - docker-compose up --build -d

script:
  - docker-compose exec --env 'RAILS_ENV=test' app rails db:create
  - docker-compose exec --env 'RAILS_ENV=test' app rails db:migrate
  - docker-compose exec --env 'RAILS_ENV=test' app bundle exec rspec

Dockerfile

FROM ruby:2.6.5

RUN apt-get update && \
    apt-get install -y mariadb-client nodejs vim --no-install-recommends && \
    rm -rf /var/lib/apt/lists/*

RUN apt-get update && apt-get install -y curl apt-transport-https wget && \
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    apt-get update && apt-get install -y yarn

RUN curl -sL https://deb.nodesource.com/setup_7.x | bash - && \
    apt-get install nodejs

RUN mkdir /screpi

WORKDIR /screpi

COPY Gemfile Gemfile.lock /screpi/
RUN gem install bundler
RUN bundle install

COPY . /screpi

COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000

# Start the main process.
CMD ["rails", "server", "-b", "0.0.0.0"]

docker-compose.yml

version: "3"
services: 
  db:
    image: mysql:5.6
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: root
    volumes:
      - mysql-data:/var/lib/mysql
    ports:
      - '4306:3306'

  app:
    tty: true
    stdin_open: true
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - '.:/screpi'
      - 'bundle:/usr/local/bundle'
    ports:
      - "3000:3000"
    links:
      - db
    depends_on:
      - db
      - chrome
    environment:
      - "SELENIUM_DRIVER_URL=http://selenium_chrome:4444/wd/hub"
      
  chrome:
    image: selenium/standalone-chrome-debug
    logging:
      driver: none

volumes:
  mysql-data:
  bundle:

試したこと

①結合テストの画面操作をする部分がうまくいっていないため、seleniumのコンテナとの連携がうまくできていないのではないかと考え、docker-compose.yml内の以下記述を追記しましたが、うまくいきませんでした。

    depends_on:
      - db
      - chrome ## 追記

　＃中略

chrome:
    image: selenium/standalone-chrome-debug
    logging:
      driver: none

②travisCI上のエラーの中で

expected to find text "新規登録" in "Sprockets::FileNotFound at / ============================ couldn't find file 'trix/dist/trix' with type 'text/css' Checked in these paths:

という記述があり、調べてみたところyarnをいれずにActionTextをインストールしようとすると起こりうるエラーのようですが、yarnはインストール済みの認識であり、trixおよびActionTextもインストールできていると認識しています。

pacjage.json

{
  "name": "screpi",
  "private": true,
  "dependencies": {
    "@rails/actioncable": "^6.0.0-alpha",
    "@rails/actiontext": "^6.0.3-4",
    "@rails/activestorage": "^6.0.0-alpha",
    "@rails/ujs": "^6.0.0-alpha",
    "@rails/webpacker": "4.3.0",
    "trix": "^1.2.0",
    "turbolinks": "^5.2.0"
  },
  "version": "0.1.0",
  "devDependencies": {
    "webpack-dev-server": "^3.11.0"
  }
}