diff --git a/.rubocop.yml b/.rubocop.yml
index 10a7cc0..84567a5 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,3 @@
-inherit_from: .rubocop_todo.yml
-
 AllCops:
   StyleGuideCopsOnly: true
 
@@ -15,9 +13,8 @@ Style/Alias:
 Style/SignalException:
   Enabled: false
 
-# TODO: uncomment when the time comes
-# Style/StringLiterals:
-#  EnforcedStyle: single_quotes
+Style/StringLiterals:
+  EnforcedStyle: single_quotes
 
 Style/TrivialAccessors:
   ExactNameMatch: true
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
deleted file mode 100644
index b572acb..0000000
--- a/.rubocop_todo.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-# This configuration was generated by
-# `rubocop --auto-gen-config`
-# on 2015-09-02 17:15:05 +0200 using RuboCop version 0.33.0.
-# The point is for the user to remove these configuration records
-# one by one as the offenses are removed from the code base.
-# Note that changes in the inspected code, or installation of new
-# versions of RuboCop, may require this file to be generated again.
-
-# Offense count: 13
-# Cop supports --auto-correct.
-# Configuration parameters: SupportedStyles.
-Style/StringLiterals:
-  EnforcedStyle: double_quotes
diff --git a/Gemfile b/Gemfile
index 6834e17..e678630 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
-gem "mediawiki_selenium", "~> 1.5.0"
-gem "rubocop", "~> 0.33.0", require: false
+gem 'mediawiki_selenium', '~> 1.5.0'
+gem 'rubocop', '~> 0.33.0', require: false
diff --git a/tests/browser/features/support/env.rb b/tests/browser/features/support/env.rb
index 57f3e6b..5eff4ce 100644
--- a/tests/browser/features/support/env.rb
+++ b/tests/browser/features/support/env.rb
@@ -1,4 +1,4 @@
-require "mediawiki_selenium"
+require 'mediawiki_selenium'
 
-require "mediawiki_selenium/support"
-require "mediawiki_selenium/step_definitions"
+require 'mediawiki_selenium/support'
+require 'mediawiki_selenium/step_definitions'
diff --git a/tests/browser/features/support/pages/does_not_exist_page.rb b/tests/browser/features/support/pages/does_not_exist_page.rb
index e24b398..f3a58da 100644
--- a/tests/browser/features/support/pages/does_not_exist_page.rb
+++ b/tests/browser/features/support/pages/does_not_exist_page.rb
@@ -12,7 +12,7 @@
 class DoesNotExistPage
   include PageObject
 
-  page_url "<%=params[:page_name]%>"
+  page_url '<%=params[:page_name]%>'
 
-  a(:create_source, text: "Create source")
+  a(:create_source, text: 'Create source')
 end
diff --git a/tests/browser/features/support/pages/edit_page.rb b/tests/browser/features/support/pages/edit_page.rb
index b0266bc..bfb6903 100644
--- a/tests/browser/features/support/pages/edit_page.rb
+++ b/tests/browser/features/support/pages/edit_page.rb
@@ -12,7 +12,7 @@
 class EditPage
   include PageObject
 
-  text_area(:article_text, id: "wpTextbox1")
-  img(:math_image, class: "tex")
-  button(:preview, id: "wpPreview")
+  text_area(:article_text, id: 'wpTextbox1')
+  img(:math_image, class: 'tex')
+  button(:preview, id: 'wpPreview')
 end