diff --git a/activesupport/lib/active_support/log_subscriber/test_helper.rb b/activesupport/lib/active_support/log_subscriber/test_helper.rb
index 3e54134c5c..dcfcf0b63c 100644
--- a/activesupport/lib/active_support/log_subscriber/test_helper.rb
+++ b/activesupport/lib/active_support/log_subscriber/test_helper.rb
@@ -18,8 +18,8 @@ module ActiveSupport
     #       Developer.all
     #       wait
     #       assert_equal 1, @logger.logged(:debug).size
-    #       assert_match /Developer Load/, @logger.logged(:debug).last
-    #       assert_match /SELECT \* FROM "developers"/, @logger.logged(:debug).last
+    #       assert_match(/Developer Load/, @logger.logged(:debug).last)
+    #       assert_match(/SELECT \* FROM "developers"/, @logger.logged(:debug).last)
     #     end
     #   end
     #
diff --git a/railties/guides/source/action_mailer_basics.textile b/railties/guides/source/action_mailer_basics.textile
index 351a4498b1..67761645fa 100644
--- a/railties/guides/source/action_mailer_basics.textile
+++ b/railties/guides/source/action_mailer_basics.textile
@@ -514,8 +514,8 @@ class UserMailerTest < ActionMailer::TestCase
     # Test the body of the sent email contains what we expect it to
     assert_equal [user.email], email.to
     assert_equal "Welcome to My Awesome Site", email.subject
-    assert_match /<h1>Welcome to example.com, #{user.name}<\/h1>/, email.encoded
-    assert_match /Welcome to example.com, #{user.name}/, email.encoded
+    assert_match(/<h1>Welcome to example.com, #{user.name}<\/h1>/, email.encoded)
+    assert_match(/Welcome to example.com, #{user.name}/, email.encoded)
   end
 end
 </ruby>
diff --git a/railties/guides/source/testing.textile b/railties/guides/source/testing.textile
index cc55d1f756..caa0d91a83 100644
--- a/railties/guides/source/testing.textile
+++ b/railties/guides/source/testing.textile
@@ -931,7 +931,7 @@ class UserControllerTest < ActionController::TestCase
 
     assert_equal "You have been invited by me@example.com", invite_email.subject
     assert_equal 'friend@example.com', invite_email.to[0]
-    assert_match /Hi friend@example.com/, invite_email.body
+    assert_match(/Hi friend@example.com/, invite_email.body)
   end
 end
 </ruby>
diff --git a/railties/lib/rails/generators/actions.rb b/railties/lib/rails/generators/actions.rb
index a7462f39ba..c43a99e85c 100644
--- a/railties/lib/rails/generators/actions.rb
+++ b/railties/lib/rails/generators/actions.rb
@@ -119,8 +119,8 @@ module Rails
         if commands.is_a?(Symbol)
           run "git #{commands}"
         else
-          commands.each do |command, options|
-            run "git #{command} #{options}"
+          commands.each do |cmd, options|
+            run "git #{cmd} #{options}"
           end
         end
       end
diff --git a/railties/lib/rails/generators/test_case.rb b/railties/lib/rails/generators/test_case.rb
index ee85b70bb5..7319fb79f6 100644
--- a/railties/lib/rails/generators/test_case.rb
+++ b/railties/lib/rails/generators/test_case.rb
@@ -81,7 +81,7 @@ module Rails
       #
       #   assert_file "app/controller/products_controller.rb" do |controller|
       #     assert_instance_method :index, content do |index|
-      #       assert_match /Product\.all/, index
+      #       assert_match(/Product\.all/, index)
       #     end
       #   end
       #
@@ -148,7 +148,7 @@ module Rails
       #
       #   assert_migration "db/migrate/create_products.rb" do |migration|
       #     assert_class_method :up, migration do |up|
-      #       assert_match /create_table/, up
+      #       assert_match(/create_table/, up)
       #     end
       #   end
       #
@@ -161,7 +161,7 @@ module Rails
       #
       #   assert_file "app/controller/products_controller.rb" do |controller|
       #     assert_instance_method :index, content do |index|
-      #       assert_match /Product\.all/, index
+      #       assert_match(/Product\.all/, index)
       #     end
       #   end
       #
diff --git a/railties/test/application/asset_debugging_test.rb b/railties/test/application/asset_debugging_test.rb
index 707abe7191..1b99af22a4 100644
--- a/railties/test/application/asset_debugging_test.rb
+++ b/railties/test/application/asset_debugging_test.rb
@@ -45,8 +45,8 @@ module ApplicationTests
 
       # the debug_assets params isn't used if compile is off
       get '/posts?debug_assets=true'
-      assert_match /<script src="\/assets\/application-([0-z]+)\.js" type="text\/javascript"><\/script>/, last_response.body
-      assert_no_match /<script src="\/assets\/xmlhr-([0-z]+)\.js" type="text\/javascript"><\/script>/, last_response.body
+      assert_match(/<script src="\/assets\/application-([0-z]+)\.js" type="text\/javascript"><\/script>/, last_response.body)
+      assert_no_match(/<script src="\/assets\/xmlhr-([0-z]+)\.js" type="text\/javascript"><\/script>/, last_response.body)
     end
 
     test "assets aren't concatened when compile is true is on and debug_assets params is true" do
@@ -58,8 +58,8 @@ module ApplicationTests
       class ::PostsController < ActionController::Base ; end
 
       get '/posts?debug_assets=true'
-      assert_match /<script src="\/assets\/application-([0-z]+)\.js\?body=1" type="text\/javascript"><\/script>/, last_response.body
-      assert_match /<script src="\/assets\/xmlhr-([0-z]+)\.js\?body=1" type="text\/javascript"><\/script>/, last_response.body
+      assert_match(/<script src="\/assets\/application-([0-z]+)\.js\?body=1" type="text\/javascript"><\/script>/, last_response.body)
+      assert_match(/<script src="\/assets\/xmlhr-([0-z]+)\.js\?body=1" type="text\/javascript"><\/script>/, last_response.body)
     end
   end
 end
diff --git a/railties/test/application/assets_test.rb b/railties/test/application/assets_test.rb
index a412b7d99b..1e0a26918b 100644
--- a/railties/test/application/assets_test.rb
+++ b/railties/test/application/assets_test.rb
@@ -77,8 +77,8 @@ module ApplicationTests
       manifest = "#{app_path}/public/assets/manifest.yml"
 
       assets = YAML.load_file(manifest)
-      assert_match /application-([0-z]+)\.js/, assets["application.js"]
-      assert_match /application-([0-z]+)\.css/, assets["application.css"]
+      assert_match(/application-([0-z]+)\.js/, assets["application.js"])
+      assert_match(/application-([0-z]+)\.css/, assets["application.css"])
     end
 
     test "precompile creates a manifest file in a custom path with all the assets listed" do
@@ -96,8 +96,8 @@ module ApplicationTests
       manifest = "#{app_path}/shared/manifest.yml"
 
       assets = YAML.load_file(manifest)
-      assert_match /application-([0-z]+)\.js/, assets["application.js"]
-      assert_match /application-([0-z]+)\.css/, assets["application.css"]
+      assert_match(/application-([0-z]+)\.js/, assets["application.js"])
+      assert_match(/application-([0-z]+)\.css/, assets["application.css"])
     end
 
 
@@ -113,7 +113,7 @@ module ApplicationTests
 
       manifest = "#{app_path}/public/x/manifest.yml"
       assets = YAML.load_file(manifest)
-      assert_match /application-([0-z]+)\.js/, assets["application.js"]
+      assert_match(/application-([0-z]+)\.js/, assets["application.js"])
     end
 
     test "precompile does not append asset digests when config.assets.digest is false" do
@@ -176,8 +176,8 @@ module ApplicationTests
       class ::PostsController < ActionController::Base ; end
 
       get '/posts'
-      assert_match /AssetNotPrecompiledError/, last_response.body
-      assert_match /app.js isn't precompiled/, last_response.body
+      assert_match(/AssetNotPrecompiledError/, last_response.body)
+      assert_match(/app.js isn't precompiled/, last_response.body)
     end
 
     test "precompile appends the md5 hash to files referenced with asset_path and run in the provided RAILS_ENV" do
@@ -189,7 +189,7 @@ module ApplicationTests
         Dir.chdir(app_path){ `bundle exec rake assets:precompile RAILS_ENV=test` }
       # end
       file = Dir["#{app_path}/public/assets/application-*.css"].first
-      assert_match /\/assets\/rails-([0-z]+)\.png/, File.read(file)
+      assert_match(/\/assets\/rails-([0-z]+)\.png/, File.read(file))
     end
 
     test "precompile appends the md5 hash to files referenced with asset_path and run in production as default even using RAILS_GROUPS=assets" do
@@ -201,7 +201,7 @@ module ApplicationTests
         Dir.chdir(app_path){ `bundle exec rake assets:precompile RAILS_GROUPS=assets` }
       end
       file = Dir["#{app_path}/public/assets/application-*.css"].first
-      assert_match /\/assets\/rails-([0-z]+)\.png/, File.read(file)
+      assert_match(/\/assets\/rails-([0-z]+)\.png/, File.read(file))
     end
 
     test "assets are cleaned up properly" do
diff --git a/railties/test/application/rake_test.rb b/railties/test/application/rake_test.rb
index cc65a674c9..0e03c3dc2d 100644
--- a/railties/test/application/rake_test.rb
+++ b/railties/test/application/rake_test.rb
@@ -79,9 +79,9 @@ module ApplicationTests
 
       silence_stderr do
         output = Dir.chdir(app_path){ `rake test` }
-        assert_match /Errors running test:units! #<ActiveRecord::AdapterNotSpecified/, output
-        assert_match /Errors running test:functionals! #<RuntimeError/, output
-        assert_match /Errors running test:integration! #<RuntimeError/, output
+        assert_match(/Errors running test:units! #<ActiveRecord::AdapterNotSpecified/, output)
+        assert_match(/Errors running test:functionals! #<RuntimeError/, output)
+        assert_match(/Errors running test:integration! #<RuntimeError/, output)
       end
     end
 
diff --git a/railties/test/generators/plugin_new_generator_test.rb b/railties/test/generators/plugin_new_generator_test.rb
index b49945f153..9183945619 100644
--- a/railties/test/generators/plugin_new_generator_test.rb
+++ b/railties/test/generators/plugin_new_generator_test.rb
@@ -197,8 +197,8 @@ class PluginNewGeneratorTest < Rails::Generators::TestCase
     assert_file "app/helpers/bukkits/application_helper.rb", /module Bukkits\n  module ApplicationHelper/
     assert_file "app/views/layouts/bukkits/application.html.erb" do |contents|
       assert_match "<title>Bukkits</title>", contents
-      assert_match /stylesheet_link_tag\s+['"]bukkits\/application['"]/, contents
-      assert_match /javascript_include_tag\s+['"]bukkits\/application['"]/, contents
+      assert_match(/stylesheet_link_tag\s+['"]bukkits\/application['"]/, contents)
+      assert_match(/javascript_include_tag\s+['"]bukkits\/application['"]/, contents)
     end
   end
 
@@ -241,7 +241,7 @@ class PluginNewGeneratorTest < Rails::Generators::TestCase
     run_generator [destination_root, "--skip-test-unit"]
     assert_no_file "test"
     assert_file "bukkits.gemspec" do |contents|
-      assert_no_match /s.test_files = Dir\["test\/\*\*\/\*"\]/, contents
+      assert_no_match(/s.test_files = Dir\["test\/\*\*\/\*"\]/, contents)
     end
   end
 
diff --git a/railties/test/generators/shared_generator_tests.rb b/railties/test/generators/shared_generator_tests.rb
index d3074afd91..1534f0d828 100644
--- a/railties/test/generators/shared_generator_tests.rb
+++ b/railties/test/generators/shared_generator_tests.rb
@@ -191,11 +191,11 @@ module SharedCustomGeneratorTests
   end
 
   def test_builder_option_with_http
-    path = "http://gist.github.com/103208.txt"
+    url = "http://gist.github.com/103208.txt"
     template = "class #{builder_class}; end"
     template.instance_eval "def read; self; end" # Make the string respond to read
 
-    generator([destination_root], :builder => path).expects(:open).with(path, 'Accept' => 'application/x-thor-template').returns(template)
+    generator([destination_root], :builder => url).expects(:open).with(url, 'Accept' => 'application/x-thor-template').returns(template)
     quietly { generator.invoke_all }
 
     default_files.each{ |path| assert_no_file(path) }
diff --git a/railties/test/railties/engine_test.rb b/railties/test/railties/engine_test.rb
index 0ff1e0f180..06a60cd858 100644
--- a/railties/test/railties/engine_test.rb
+++ b/railties/test/railties/engine_test.rb
@@ -400,7 +400,7 @@ module RailtiesTest
       boot_rails
 
       get("/bukkits/posts/new")
-      assert_match /name="post\[title\]"/, last_response.body
+      assert_match(/name="post\[title\]"/, last_response.body)
     end
 
     test "isolated engine should set correct route module prefix for nested namespace" do
diff --git a/railties/test/railties/shared_tests.rb b/railties/test/railties/shared_tests.rb
index 9a64b7c64e..6ed99c76de 100644
--- a/railties/test/railties/shared_tests.rb
+++ b/railties/test/railties/shared_tests.rb
@@ -61,21 +61,21 @@ module RailtiesTest
 
         assert File.exists?("#{app_path}/db/migrate/2_create_users.rb")
         assert File.exists?("#{app_path}/db/migrate/3_add_last_name_to_users.rb")
-        assert_match /Copied migration 2_create_users.rb from bukkits/, output
-        assert_match /Copied migration 3_add_last_name_to_users.rb from bukkits/, output
-        assert_match /NOTE: Migration 3_create_sessions.rb from bukkits has been skipped/, output
+        assert_match(/Copied migration 2_create_users.rb from bukkits/, output)
+        assert_match(/Copied migration 3_add_last_name_to_users.rb from bukkits/, output)
+        assert_match(/NOTE: Migration 3_create_sessions.rb from bukkits has been skipped/, output)
         assert_equal 3, Dir["#{app_path}/db/migrate/*.rb"].length
 
         output = `bundle exec rake railties:install:migrations`.split("\n")
 
         assert File.exists?("#{app_path}/db/migrate/4_create_yaffles.rb")
-        assert_no_match /2_create_users/, output.join("\n")
+        assert_no_match(/2_create_users/, output.join("\n"))
 
         yaffle_migration_order = output.index(output.detect{|o| /Copied migration 4_create_yaffles.rb from acts_as_yaffle/ =~ o })
         bukkits_migration_order = output.index(output.detect{|o| /NOTE: Migration 3_create_sessions.rb from bukkits has been skipped/ =~ o })
         assert_not_nil yaffle_migration_order, "Expected migration to be copied"
         assert_not_nil bukkits_migration_order, "Expected migration to be skipped"
-        assert_equal (railties.index('acts_as_yaffle') > railties.index('bukkits')) , (yaffle_migration_order > bukkits_migration_order)
+        assert_equal((railties.index('acts_as_yaffle') > railties.index('bukkits')) , (yaffle_migration_order > bukkits_migration_order))
 
         migrations_count = Dir["#{app_path}/db/migrate/*.rb"].length
         output = `bundle exec rake railties:install:migrations`