title: Rails tests can't find test_helper
body: <p>I'm trying to run individual tests through ruby test/unit/mytest.rb, but I always get a "no such file to load - test_helper" error. Google brought up a few suggestions, but none of them worked for me. I'm running Rails 3.0, Ruby 1.9.2 (through RVM) on Ubuntu 10.10</p>
  
  <p>Here's what I've tried so far - any suggestions really appreciated</p>
  
  <ul>
  <li>Changed the "require test_helper" to "require File.dirname(<strong>FILE</strong>) + "/../test_helper"
  " in test/unit/mytest_test.rb. It brings back " no such file to load -- test/unit/../test_helper"</li>
  <li>Tried running rvm test/unit/mytest_test.rb Same as above</li>
  <li>Tried running ruby -I test/unit/mytest_test.rb. No messages to the terminal. After about 5 minutes waiting for something to happen, ctrl+c'd out of it</li>
  </ul>
  
  <p>Any suggestions very appreciated - I'm stumped.</p>