diff --git a/Gemfile b/Gemfile
index 6767da0..fc2f307 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 # Specify your gem's dependencies in activemodel-email_address_validator.gemspec
 gemspec
diff --git a/activemodel-email_address_validator.gemspec b/activemodel-email_address_validator.gemspec
index 78c1be6..663a726 100644
--- a/activemodel-email_address_validator.gemspec
+++ b/activemodel-email_address_validator.gemspec
@@ -1,7 +1,7 @@
 # coding: utf-8
-lib = File.expand_path('../lib', __FILE__)
+lib = File.expand_path("../lib", __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'activemodel_email_address_validator/version'
+require "activemodel_email_address_validator/version"
 
 Gem::Specification.new do |spec|
   spec.name          = "activemodel-email_address_validator"
diff --git a/lib/activemodel_email_address_validator/email_address.rb b/lib/activemodel_email_address_validator/email_address.rb
index 297d238..bc93b04 100644
--- a/lib/activemodel_email_address_validator/email_address.rb
+++ b/lib/activemodel_email_address_validator/email_address.rb
@@ -26,14 +26,14 @@ def valid_using_regex?(regex)
 
     def valid_using_default?
       return false if address =~ /\s+/
-      email_parts = address.split('@')
+      email_parts = address.split("@")
 
       return false unless email_parts.size == 2
 
       user, host = *email_parts
       return false unless user =~ /^([^.]+\S)*[^. ]+$/
       return false unless host =~ /^([^,. ]+\.)+[^,. ]+$/
-      return true
+      true
     end
   end
 end
diff --git a/test/activemodel-email_address_validator/test_email_address.rb b/test/activemodel-email_address_validator/test_email_address.rb
index 05c398b..632d05e 100644
--- a/test/activemodel-email_address_validator/test_email_address.rb
+++ b/test/activemodel-email_address_validator/test_email_address.rb
@@ -1,4 +1,4 @@
-require 'minitest_helper'
+require "minitest_helper"
 
 class EmailAddressValidTest < MiniTest::Test
   def test_accepts_common_email_address_format
diff --git a/test/minitest_helper.rb b/test/minitest_helper.rb
index 3d93dc2..9ca589d 100644
--- a/test/minitest_helper.rb
+++ b/test/minitest_helper.rb
@@ -1,8 +1,8 @@
 require "coveralls"
 Coveralls.wear!
 
-$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
-require 'activemodel-email_address_validator'
+$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
+require "activemodel-email_address_validator"
 
-require 'minitest/autorun'
-require 'minitest/spec'
+require "minitest/autorun"
+require "minitest/spec"
diff --git a/test/test_active_model_integration.rb b/test/test_active_model_integration.rb
index c208965..f7ce3dd 100644
--- a/test/test_active_model_integration.rb
+++ b/test/test_active_model_integration.rb
@@ -1,5 +1,5 @@
-require 'minitest_helper'
-require 'active_model'
+require "minitest_helper"
+require "active_model"
 
 def build_model_with_validations(validations = {:email => {:email_address => true}})
   klass = Class.new do