当使用“heroku run rails test”时，我收到错误“将'gem'gilks-controller-testing'`添加到你的Gemfile中”，它已经添加到我的gemfile中了

Question

我正在创建一个新的rails应用程序，我正在研究基于“rails tutorial”一书的注册系统，但是当我运行时我遇到了一个问题

rails test

在我的本地计算机上为我的rails应用程序，我没有错误

但是当将应用程序推送到heroku时，然后运行

heroku run rails test

我收到了这个错误

 Error:
    UsersSignupTest#test_valid_signup_information:
    NoMethodError: assert_template has been extracted to a gem. To continue using it,
            add `gem 'rails-controller-testing'` to your Gemfile.
        test/integration/users_signup_test.rb:25:in `block in <class:UsersSignupTest>'

这是我的宝石文件

source 'https://rubygems.org'
ruby "2.5.1"

gem 'rails',        '5.1.4'
gem 'bootstrap-sass', '3.3.7'
gem 'bcrypt',       '3.1.12'
gem 'puma',         '3.9.1'
gem 'sass-rails',   '5.0.6'
gem 'uglifier',     '3.2.0'
gem 'coffee-rails', '4.2.2'
gem 'jquery-rails', '4.3.1'
gem 'turbolinks',   '5.0.1'
gem 'jbuilder',     '2.7.0'
gem 'carrierwave', '~> 0.11.2'

group :development, :test do
  gem 'sqlite3', '1.3.13'
  gem 'byebug',  '9.0.6', platform: :mri
end

group :development do
  gem 'web-console',           '3.5.1'
  gem 'listen',                '3.1.5'
  gem 'spring',                '2.0.2'
  gem 'spring-watcher-listen', '2.0.1'
end

group :test do
  gem 'rails-controller-testing', '1.0.2'
  gem 'minitest',                 '5.10.3'
  gem 'minitest-reporters',       '1.1.14'
  gem 'guard',                    '2.13.0'
  gem 'guard-minitest',           '2.4.4'
end

group :production do
  gem 'pg', '0.18.4'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

任何解决方案，知道我还是新手：）