diff --git a/Gemfile b/Gemfile
index 6da3f4e..bee985e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ group :test do
   gem 'mime-types', '~> 1.25', :platforms => [:jruby, :ruby_18]
   gem 'rack-test'
   gem 'rspec', '>= 2.14'
-  gem 'rubocop', '>= 0.17', :platforms => [:ruby_19, :ruby_20, :ruby_21]
+  gem 'rubocop', '>= 0.19', :platforms => [:ruby_19, :ruby_20, :ruby_21]
   gem 'simplecov', :require => false
 end
 
diff --git a/lib/omniauth/auth_hash.rb b/lib/omniauth/auth_hash.rb
index b2b05b3..5893478 100644
--- a/lib/omniauth/auth_hash.rb
+++ b/lib/omniauth/auth_hash.rb
@@ -40,7 +40,7 @@ module OmniAuth
       end
 
       def name?
-        !!name
+        !!name # rubocop:disable DoubleNegation
       end
       alias_method :valid?, :name?
 
diff --git a/lib/omniauth/test/phony_session.rb b/lib/omniauth/test/phony_session.rb
index dce23a5..581ea34 100644
--- a/lib/omniauth/test/phony_session.rb
+++ b/lib/omniauth/test/phony_session.rb
@@ -1,11 +1,15 @@
-class OmniAuth::Test::PhonySession
-  def initialize(app)
-    @app = app
-  end
+module OmniAuth
+  module Test
+    class PhonySession
+      def initialize(app)
+        @app = app
+      end
 
-  def call(env)
-    @session ||= (env['rack.session'] || {})
-    env['rack.session'] = @session
-    @app.call(env)
+      def call(env)
+        @session ||= (env['rack.session'] || {})
+        env['rack.session'] = @session
+        @app.call(env)
+      end
+    end
   end
 end
diff --git a/omniauth.gemspec b/omniauth.gemspec
index 72f0ca2..67fe333 100644
--- a/omniauth.gemspec
+++ b/omniauth.gemspec
@@ -8,13 +8,13 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'rack', '~> 1.0'
   spec.add_development_dependency 'bundler', '~> 1.0'
   spec.authors       = ['Michael Bleigh', 'Erik Michaels-Ober']
-  spec.description   = %q{A generalized Rack framework for multiple-provider authentication.}
+  spec.description   = %q(A generalized Rack framework for multiple-provider authentication.)
   spec.email         = ['michael@intridea.com', 'sferik@gmail.com']
   spec.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
   spec.homepage      = 'http://github.com/intridea/omniauth'
-  spec.licenses      = ['MIT']
+  spec.licenses      = %w(MIT)
   spec.name          = 'omniauth'
-  spec.require_paths = ['lib']
+  spec.require_paths = %w(lib)
   spec.required_rubygems_version = '>= 1.3.5'
   spec.summary       = spec.description
   spec.test_files    = spec.files.grep(/^spec\//)
diff --git a/spec/omniauth/builder_spec.rb b/spec/omniauth/builder_spec.rb
index 1988d12..92d13fb 100644
--- a/spec/omniauth/builder_spec.rb
+++ b/spec/omniauth/builder_spec.rb
@@ -10,7 +10,7 @@ describe OmniAuth::Builder do
     end
 
     it 'accepts a class' do
-      class ::ExampleClass; end
+      class ExampleClass; end
 
       expect do
         OmniAuth::Builder.new(nil) do