~/myapp $ rvm ruby-2.2.0 do rvm gemset create stackoverflow
ruby-2.2.0 - #gemset created /Users/io/.rvm/gems/ruby-2.2.0@stackoverflow
ruby-2.2.0 - #generating stackoverflow wrappers........
~/myapp $ rvm use 2.2@stackoverflow
Using /Users/io/.rvm/gems/ruby-2.2.0 with gemset stackoverflow
~/myapp $ bundle install
# trimmed
~/myapp $ RAILS_ENV=ci rake
/Users/io/.rvm/rubies/ruby-2.2.0/bin/ruby -I/Users/io/.rvm/gems/ruby-2.2.0@stackoverflow/gems/rspec-core-3.3.2/lib:/Users/io/.rvm/gems/ruby-2.2.0@stackoverflow/gems/rspec-support-3.3.0/lib /Users/io/.rvm/gems/ruby-2.2.0@stackoverflow/gems/rspec-core-3.3.2/exe/rspec --pattern spec/\*\*\{,/\*/\*\*\}/\*_spec.rb
...............................................................................................

Finished in 14.42 seconds (files took 3.06 seconds to load)
95 examples, 0 failures

 ~/myapp $ RAILS_ENV=ci rake spec
 # No output, just a brief pause and back to shell prompt
 ~/myapp $ RAILS_ENV=ci rspec
...............................................................................................

Finished in 26.47 seconds (files took 2.95 seconds to load)
95 examples, 0 failures
~/myapp $ RAILS_ENV=ci bundle exec rake
# No output, just a brief pause and back to shell prompt
~/myapp $ RAILS_ENV=ci bundle exec rake spec
# No output, just a brief pause and back to shell prompt
~/myapp $ RAILS_ENV=ci bundle exec rspec
...............................................................................................

Finished in 24.65 seconds (files took 3.13 seconds to load)
95 examples, 0 failures