diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 1a3df0224a682b3b0817290f57785623a467a08c..b204103ddc5c8be45b9697a65f9f26c638742d3c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,6 @@
 require 'rspec-puppet/spec_helper'
 
+# https://github.com/rodjek/rspec-puppet/#configurate-manifests-for-puppet-4
 RSpec.configure do |c|
   c.module_path     = File.join(File.dirname(File.expand_path(__FILE__)), 'fixtures', 'modules') + ':~/.puppet/modules'
   c.manifest_dir    = File.join(File.dirname(File.expand_path(__FILE__)), 'fixtures', 'manifests')