Gemfile in sentry-raven-2.7.1 vs Gemfile in sentry-raven-2.7.2

@@ -15,19 +15,24 @@
 if RUBY_VERSION < '2.0'
   gem "mime-types", "< 3.0.0"
   gem "nokogiri", "~> 1.6.8"
   gem "rack", "~> 1.6.8"
   gem "sidekiq", "< 3.2"
+  gem "rack-timeout", "0.3.0"
 else
   gem "rack"
   gem "sidekiq"
+  gem "rack-timeout"
 end
 gem "pry"
 gem "pry-coolline"
 gem "benchmark-ips"
 gem "benchmark-ipsa" if RUBY_VERSION > '2.0'
 gem "ruby-prof", platform: :mri
 gem "rake"
 gem "rubocop", "~> 0.41.1"
 gem "rspec"
+gem "capybara" # rspec system tests
+gem "puma" # rspec system tests
+
 gem "timecop"
 gem "test-unit", platform: :mri if RUBY_VERSION > '2.2'