Gemfile in sentry-raven-2.5.3 vs Gemfile in sentry-raven-2.6.0

@@ -2,12 +2,16 @@
 
 gemspec
 
 if ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 4)
   gem "rails", "< 5"
-elsif ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 5)
+  gem "rspec-rails"
+elsif ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 0)
+  # no-op. No Rails.
+else
   gem "rails", "< 6"
+  gem "rspec-rails"
 end
 
 if RUBY_VERSION < '2.0'
   gem "mime-types", "< 3.0.0"
   gem "nokogiri", "~> 1.6.8"
@@ -23,8 +27,7 @@
 gem "benchmark-ipsa" if RUBY_VERSION > '2.0'
 gem "ruby-prof", platform: :mri
 gem "rake"
 gem "rubocop", "~> 0.41.1"
 gem "rspec"
-gem "rspec-rails"
 gem "timecop"
 gem "test-unit", platform: :mri if RUBY_VERSION > '2.2'