It's failing because on 1.9+, `.` is not on the ruby load path.  It is in on 1.8.7, so it passes there.  RSpec adds `lib` and `spec` to the load path.  Try this:

```ruby
Scenario: Specifying a seed using srand provides predictable randomization
  Given a file named "spec/spec_helper.rb" with:
    """ruby
    srand 123
    """
  And a file named "spec/random_spec.rb" with:
    """ruby
    require 'spec_helper'
    describe 'randomized example' do
      it 'prints random numbers' do
        5.times { print rand(99) }
      end
    end
    """
  When I run `rspec`
  Then the output should contain "6692981783"
```