something.rb

# how to test that this works?
# or would you even bother?

...

begin
  require 'system_timer'
rescue LoadError
  require 'timeout'
  SystemTimer = Timeout
end

...

spec_helper.rb

$LOAD_PATH.unshift(File.dirname(__FILE__))
$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))

require 'rubygems'
require 'spec'
require 'webmock/rspec'
require 'something' # <--- it's already loaded here
require 'faker'

...