title: Rails 3 + Heroku: cannot load such file -- test/unit/testcase (LoadError)
body: <p>I'm having the following error when running the console in heroku (<code>heroku run console</code>...). The application is running without problems, but I seem to be unable to run the console because of this and in development I'm not having this issue.</p>
  
  <pre><code>/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- test/unit/testcase (LoadError)
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/test_case.rb:1:in `&lt;top (required)&gt;'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/console/app.rb:2:in `&lt;top (required)&gt;'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
  from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:304:in `initialize_console'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:152:in `load_console'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:27:in `start'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start'
  from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:41:in `&lt;top (required)&gt;'
  from script/rails:6:in `require'
  from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>This is my Gemfile:</p>
  
  <pre><code>source 'http://rubygems.org'
  ruby '1.9.3'
  
  gem 'rails', '3.2.9'
  
  gem 'oauth', '~&gt; 0.4.4'
  gem 'twitter', '~&gt; 1.4.1'
  gem 'sendgrid'
  gem 'koala'
  
  gem 'therubyracer', '0.10.2'
  gem 'execjs'
  
  # Rails 3.1 - Asset Pipeline
  gem 'json'
  
  group :assets do
    gem 'sass-rails', "  &gt;= 3.2.3"
    gem 'coffee-rails', "&gt;= 3.2.1"
    gem 'uglifier', '&gt;= 1.0.3'
    gem 'bootstrap-sass'
  end
  
  gem 'coffee-script'
  
  gem 'jquery-rails'
  
  gem "fog"
  gem 'bootstrap-wysihtml5-rails', '0.3.1.10'
  
  group :production do
    gem "heroku"
    gem 'pg', '0.13'
    gem 'newrelic_rpm'
    gem 'newrelic_api'
  end
  
  group :test do
    gem 'email_spec'
    gem "cucumber-rails"
    gem "rspec-rails"
    gem "capybara"
    gem 'culerity'
    gem "selenium-webdriver"
    gem "database_cleaner"
    gem 'factory_girl_rails'
  end
  
  group :development, :grades, :test do
    gem "launchy"
    gem "mysql2"
    gem "letter_opener"
    gem "pry"
    gem "rails-erd"
  end
  
  gem "airbrake"
  gem "authlogic"
  gem 'awesome_print'
  gem 'cancan'
  gem 'dalli'
  
  #gem "oink"
  gem 'validates_timeliness', '~&gt; 3.0.2'
  gem 'hpricot'
  gem "ruby_parser"
  gem "prawn_rails"
  gem "thin"
  gem "nested_form", :git =&gt; "git://github.com/ryanb/nested_form.git"
  gem "meta_search"
  gem "carrierwave"
  gem "aws-s3"
  gem "mini_magick"
  gem 'will_paginate'
  gem "spreadsheet"
  gem "oauth-plugin", "&gt;= 0.4.0.pre1"
  gem 'flash_cookie_session'
  gem 'haml-rails'
  gem 'squeel'
  gem 'rails_best_practices', :group =&gt; :development
  gem 'simple_form'
  gem 'taps', :group =&gt; :development
  gem 'resque'
  gem "audited-activerecord", "~&gt; 3.0"
  gem "lograge"
  gem 'quiet_assets'
  gem 'yajl-ruby', :require =&gt; "yajl"
  gem 'switch_user'
  </code></pre>
  
  <p>I've got no idea why I'm getting this error. Any thoughts? Thanks</p>