Gemfile in gummi-1.0.6 vs Gemfile in gummi-1.0.7

@@ -1,9 +1,10 @@
 source 'https://rubygems.org'
 
 gemspec
 
 group :development, :test do
+  gem 'activemodel'
   gem 'codeclimate-test-reporter', group: :test, require: nil
   gem 'guard-bundler', '2.0.0'
   gem 'guard-rspec', '4.0.4'
   gem 'timecop', '0.7.0'
 end