diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 1dcf3c2d4..a01ae56cd 100755
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,104 +1,116 @@
 dir = File.expand_path(File.dirname(__FILE__))
 $LOAD_PATH.unshift File.join(dir, 'lib')
 
 # Don't want puppet getting the command line arguments for rake or autotest
 ARGV.clear
 
 require 'puppet'
 require 'mocha'
 gem 'rspec', '>=2.0.0'
 require 'rspec/expectations'
 
 # So everyone else doesn't have to include this base constant.
 module PuppetSpec
   FIXTURE_DIR = File.join(dir = File.expand_path(File.dirname(__FILE__)), "fixtures") unless defined?(FIXTURE_DIR)
 end
 
 require 'pathname'
 require 'tmpdir'
 
 require 'lib/puppet_spec/verbose'
 require 'lib/puppet_spec/files'
 require 'lib/puppet_spec/fixtures'
 require 'monkey_patches/alias_should_to_must'
 require 'monkey_patches/publicize_methods'
 require 'monkey_patches/disable_signal_trap'
 
 Pathname.glob("#{dir}/shared_behaviours/**/*.rb") do |behaviour|
   require behaviour.relative_path_from(Pathname.new(dir))
 end
 
 RSpec.configure do |config|
   include PuppetSpec::Fixtures
 
   config.mock_with :mocha
 
   config.before :each do
     GC.disable
 
     # these globals are set by Application
     $puppet_application_mode = nil
     $puppet_application_name = nil
 
     # REVISIT: I think this conceals other bad tests, but I don't have time to
     # fully diagnose those right now.  When you read this, please come tell me
     # I suck for letting this float. --daniel 2011-04-21
     Signal.stubs(:trap)
 
     # Set the confdir and vardir to gibberish so that tests
     # have to be correctly mocked.
     Puppet[:confdir] = "/dev/null"
     Puppet[:vardir] = "/dev/null"
 
     # Avoid opening ports to the outside world
     Puppet.settings[:bindaddress] = "127.0.0.1"
 
     @logs = []
     Puppet::Util::Log.newdestination(Puppet::Test::LogCollector.new(@logs))
 
     @log_level = Puppet::Util::Log.level
   end
 
   config.after :each do
     Puppet.settings.clear
     Puppet::Node::Environment.clear
     Puppet::Util::Storage.clear
     Puppet::Util::ExecutionStub.reset
 
     PuppetSpec::Files.cleanup
 
     @logs.clear
     Puppet::Util::Log.close_all
     Puppet::Util::Log.level = @log_level
 
     GC.enable
   end
 end
 
 RSpec::Matchers.define :have_matching_element do |expected|
   match do |actual|
     actual.any? { |item| item =~ expected }
   end
 end
 
 RSpec::Matchers.define :exit_with do |expected|
   actual = nil
   match do |block|
     begin
       block.call
     rescue SystemExit => e
       actual = e.status
     end
     actual and actual == expected
   end
   failure_message_for_should do |block|
     "expected exit with code #{expected} but " +
       (actual.nil? ? " exit was not called" : "we exited with #{actual} instead")
   end
   failure_message_for_should_not do |block|
     "expected that exit would not be called with #{expected}"
   end
   description do
     "expect exit with #{expected}"
   end
 end
+
+# Backward compatibility for Jenkins outdated environment.
+module RSpec
+  module Matchers
+    module BlockAliases
+      alias_method :to,     :should      unless method_defined? :to
+      alias_method :to_not, :should_not  unless method_defined? :to_not
+      alias_method :not_to, :should_not  unless method_defined? :not_to
+    end
+  end
+end
+