Vanilla Rails 2.1 and Unit Test Error

I did a basic rails 2.1 command and made a basic model and ran the
unit tests with rake, I get this error:

LoadError: no such file to load — test_helper

I went back and compared my old unit tests from other projects to the
one that was generated, this is what I found:

RAILS 2.1:
require 'test_helper'

RAILS 2.0.2:
require File.dirname(__FILE__) + '/../test_helper'

Now, if I copy/paste my old rails 2.0.2 require statement, it works
perfectly. Did this get overlooked?

I'm learning from this book to currently and got snagged on the test
chapter because of this same error - http://www.pragprog.com/titles/ndphpr/rails-for-php-developers

It has me run a test directly like 'ruby test/unit/meeting_test.rb . I
just changed the require at the top from:

require 'test_helper'

to:

require 'test/test_helper'

I don't know if this will help you when running from rake though, but
it worked for me. Perhaps this is a mistake with 2.1.0. I'm don't
know. I'm a noob.