When I run rspec spec I get the following:
rspec spec
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-rails-2.7.0/lib/rspec/rails/extensions/active_record/base.rb:26:in `
In my case
gem "spork-rails", "~> 4.0.0"
was missing in ./Gemfile.
./Gemfile