Upgraded to Rails 4

spec/models/attachment_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe Attachment do
   pending "add some examples to (or delete) #{__FILE__}"
-  let(:attachment) {FactoryGirl.build_stubbed(:attachment)}
+  let(:attachment) {FactoryBot.build_stubbed(:attachment)}
   it "responds to image" do 
     expect(attachment.respond_to?(:image?)).to be true
   end