Gemfile in guard-jekyll-1.4.0 vs Gemfile in guard-jekyll-1.5.0

@@ -1,3 +1,12 @@
 source "https://rubygems.org"
 
-gemspec
+gemspec development_group: :gem_build_tools
+
+gem 'rake'
+
+group :test do
+  gem 'rspec', '~> 3.1', require: false
+end
+
+group :development do
+end