title: Cannot load gem rack/test
body: <p>I'm trying to load `rack/test` into my application, but it's not working for some reason. When I do:</p>
  
  <p><code>gem list rack-test</code> </p>
  
  <p>I get</p>
  
  <p><code>rack-test (0.6.2)</code></p>
  
  <p>So it's installed.</p>
  
  <p>I can also get the path with:</p>
  
  <p><code>gem which rack/test</code></p>
  
  <p>which is</p>
  
  <p><code>/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-test-0.6.2/lib/rack/test.rb</code></p>
  
  <p>But then</p>
  
  <p><code>ruby -e 'puts $LOAD_PATH.inspect; $LOAD_PATH &lt;&lt; "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/gems/1.9.1/gems/"; require "rack/test"'</code></p>
  
  <p>yields</p>
  
  <pre><code>["/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/i686-linux", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/vendor_ruby/1.9.1", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/vendor_ruby/1.9.1/i686-linux", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/vendor_ruby", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1", "/home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/i686-linux"]
  /home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- rack/test (LoadError)
      from /home/jacky/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
      from -e:1:in `&lt;main&gt;'
  </code></pre>
  
  <p>What am I doing wrong?</p>