8 files changed, 8 insertions, 11 deletions
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb
index 7fd5d76ba5..9556878f63 100644
--- a/activerecord/lib/active_record/validations/uniqueness.rb
+++ b/activerecord/lib/active_record/validations/uniqueness.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/array/prepend_and_append'
+
 module ActiveRecord
   module Validations
     class UniquenessValidator < ActiveModel::EachValidator
@@ -49,7 +51,7 @@ module ActiveRecord
         class_hierarchy = [record.class]
 
         while class_hierarchy.first != @klass
-          class_hierarchy.insert(0, class_hierarchy.first.superclass)
+          class_hierarchy.prepend(class_hierarchy.first.superclass)
         end
 
         class_hierarchy.detect { |klass| !klass.abstract_class? }
diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb
index 3ac2a76b96..901aaa5f72 100644
--- a/activerecord/test/cases/attribute_methods_test.rb
+++ b/activerecord/test/cases/attribute_methods_test.rb
@@ -8,7 +8,6 @@ require 'models/computer'
 require 'models/topic'
 require 'models/company'
 require 'models/category'
-require 'models/reply'
 require 'models/contact'
 require 'models/keyboard'
 
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 562b370c97..20c1a17cef 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -16,7 +16,6 @@ require 'models/parrot'
 require 'models/pirate'
 require 'models/post'
 require 'models/randomly_named_c1'
-require 'models/reply'
 require 'models/ship'
 require 'models/task'
 require 'models/topic'
diff --git a/activerecord/test/cases/identity_map_test.rb b/activerecord/test/cases/identity_map_test.rb
index 3efc8bf559..3d2aee3809 100644
--- a/activerecord/test/cases/identity_map_test.rb
+++ b/activerecord/test/cases/identity_map_test.rb
@@ -1,10 +1,8 @@
 require "cases/helper"
-
 require 'models/developer'
 require 'models/project'
 require 'models/company'
 require 'models/topic'
-require 'models/reply'
 require 'models/computer'
 require 'models/customer'
 require 'models/order'
diff --git a/activerecord/test/cases/named_scope_test.rb b/activerecord/test/cases/named_scope_test.rb
index e17ba76437..cd787e40c6 100644
--- a/activerecord/test/cases/named_scope_test.rb
+++ b/activerecord/test/cases/named_scope_test.rb
@@ -2,7 +2,6 @@ require "cases/helper"
 require 'models/post'
 require 'models/topic'
 require 'models/comment'
-require 'models/reply'
 require 'models/author'
 require 'models/developer'
 
diff --git a/activerecord/test/cases/primary_keys_test.rb b/activerecord/test/cases/primary_keys_test.rb
index e6e50a4cd4..adb4f4c4fb 100644
--- a/activerecord/test/cases/primary_keys_test.rb
+++ b/activerecord/test/cases/primary_keys_test.rb
@@ -1,6 +1,5 @@
 require "cases/helper"
 require 'models/topic'
-require 'models/reply'
 require 'models/subscriber'
 require 'models/movie'
 require 'models/keyboard'
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 0471d03f3b..904387063d 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -4,7 +4,6 @@ require 'models/tagging'
 require 'models/post'
 require 'models/topic'
 require 'models/comment'
-require 'models/reply'
 require 'models/author'
 require 'models/comment'
 require 'models/entrant'
diff --git a/activesupport/lib/active_support/inflector/inflections.rb b/activesupport/lib/active_support/inflector/inflections.rb
index 90bb62f57b..8cd96fe2d1 100644
--- a/activesupport/lib/active_support/inflector/inflections.rb
+++ b/activesupport/lib/active_support/inflector/inflections.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/array/prepend_and_append'
+
 module ActiveSupport
   module Inflector
     # A singleton instance of this class is yielded by Inflector.inflections, which can then be used to specify additional
@@ -82,7 +84,7 @@ module ActiveSupport
       def plural(rule, replacement)
         @uncountables.delete(rule) if rule.is_a?(String)
         @uncountables.delete(replacement)
-        @plurals.insert(0, [rule, replacement])
+        @plurals.prepend([rule, replacement])
       end
 
       # Specifies a new singularization rule and its replacement. The rule can either be a string or a regular expression.
@@ -90,7 +92,7 @@ module ActiveSupport
       def singular(rule, replacement)
         @uncountables.delete(rule) if rule.is_a?(String)
         @uncountables.delete(replacement)
-        @singulars.insert(0, [rule, replacement])
+        @singulars.prepend([rule, replacement])
       end
 
       # Specifies a new irregular that applies to both pluralization and singularization at the same time. This can only be used
@@ -134,7 +136,7 @@ module ActiveSupport
       #   human /_cnt$/i, '\1_count'
       #   human "legacy_col_person_name", "Name"
       def human(rule, replacement)
-        @humans.insert(0, [rule, replacement])
+        @humans.prepend([rule, replacement])
       end
 
       # Clears the loaded inflections within a given scope (default is <tt>:all</tt>).