rspec not creating test models when generating model

I've installed rspec through rails g rspec:install. ANd according to the documentation of rspec that would suffice to create models (model_spec.rb)

So I created a model right after rails g model group name:string. It creates a test_unit model but no rspec model. using generate instead of g didn't help either.

Here's my test-part of my gemfile:

group :test do
  gem 'guard-rspec'
  gem 'capybara', '~> 2.0'
  gem 'factory_girl_rails', '~> 4.2'
  gem 'rspec-rails', '~> 2.14'
  gem 'fuubar'
  gem 'cucumber-rails', require: false
  gem 'guard'
  gem 'guard-bundler'
  gem 'guard-cucumber'
  gem 'rb-inotify', require: false
  gem 'rb-fsevent', require: false
  gem 'rb-fchange', require: false
  gem 'growl'
  gem 'shoulda'
  gem 'simplecov', require: false 
end

Am I forgetting something perhaps?