diff --git a/app/models/category.rb b/app/models/category.rb
index 2b1a3966e40..1b512899987 100644
--- a/app/models/category.rb
+++ b/app/models/category.rb
@@ -1,8 +1,6 @@
-require_dependency "concern/positionable"
-
 class Category < ActiveRecord::Base
 
-  include Concern::Positionable
+  include Positionable
 
   belongs_to :topic, dependent: :destroy
   belongs_to :topic_only_relative_url,
diff --git a/app/models/concerns/positionable.rb b/app/models/concerns/positionable.rb
new file mode 100644
index 00000000000..db0f92472ae
--- /dev/null
+++ b/app/models/concerns/positionable.rb
@@ -0,0 +1,37 @@
+module Positionable
+  extend ActiveSupport::Concern
+
+  def move_to(position_arg)
+
+    position = [[position_arg, 0].max, self.class.count - 1].min
+
+    if self.position.nil? or position > self.position
+      self.exec_sql "
+      UPDATE #{self.class.table_name}
+      SET position = position - 1
+      WHERE position > :current_position and position <= :new_position",
+      {current_position: self.position, new_position: position}
+    elsif position < self.position
+      self.exec_sql "
+      UPDATE #{self.class.table_name}
+      SET position = position + 1
+      WHERE position >= :new_position and position < :current_position",
+      {current_position: self.position, new_position: position}
+    else
+      # Not moving to a new position
+      return
+    end
+
+    self.exec_sql "
+    UPDATE #{self.class.table_name}
+    SET position = :position
+    WHERE id = :id", {id: id, position: position}
+  end
+
+  def use_default_position
+    self.exec_sql "
+    UPDATE #{self.class.table_name}
+    SET POSITION = null
+    WHERE id = :id", {id: id}
+  end
+end
diff --git a/lib/roleable.rb b/app/models/concerns/roleable.rb
similarity index 96%
rename from lib/roleable.rb
rename to app/models/concerns/roleable.rb
index 1e39f9f44da..c266eb6b85c 100644
--- a/lib/roleable.rb
+++ b/app/models/concerns/roleable.rb
@@ -1,5 +1,3 @@
-require 'active_support/concern'
-
 module Roleable
   extend ActiveSupport::Concern
 
diff --git a/lib/trashable.rb b/app/models/concerns/trashable.rb
similarity index 100%
rename from lib/trashable.rb
rename to app/models/concerns/trashable.rb
diff --git a/app/models/discourse_single_sign_on.rb b/app/models/discourse_single_sign_on.rb
index a630fa7aa19..2e959679964 100644
--- a/app/models/discourse_single_sign_on.rb
+++ b/app/models/discourse_single_sign_on.rb
@@ -1,4 +1,5 @@
 require_dependency 'single_sign_on'
+
 class DiscourseSingleSignOn < SingleSignOn
   def self.sso_url
     SiteSetting.sso_url
diff --git a/app/models/invite.rb b/app/models/invite.rb
index 11c07bd9ee7..2ea756d7d5a 100644
--- a/app/models/invite.rb
+++ b/app/models/invite.rb
@@ -1,5 +1,3 @@
-require_dependency 'trashable'
-
 class Invite < ActiveRecord::Base
   include Trashable
 
diff --git a/app/models/post.rb b/app/models/post.rb
index 82f1b8fead8..879e2c33d41 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -3,7 +3,6 @@ require_dependency 'pretty_text'
 require_dependency 'rate_limiter'
 require_dependency 'post_revisor'
 require_dependency 'enum'
-require_dependency 'trashable'
 require_dependency 'post_analyzer'
 require_dependency 'validators/post_validator'
 require_dependency 'plugin/filter'
diff --git a/app/models/post_action.rb b/app/models/post_action.rb
index b804c6199d9..03d977ae50e 100644
--- a/app/models/post_action.rb
+++ b/app/models/post_action.rb
@@ -1,6 +1,5 @@
 require_dependency 'rate_limiter'
 require_dependency 'system_message'
-require_dependency 'trashable'
 
 class PostAction < ActiveRecord::Base
   class AlreadyActed < StandardError; end
diff --git a/app/models/topic.rb b/app/models/topic.rb
index 8aa2c1e5bf9..75a0ec44ce3 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -4,7 +4,6 @@ require_dependency 'topic_view'
 require_dependency 'rate_limiter'
 require_dependency 'text_sentinel'
 require_dependency 'text_cleaner'
-require_dependency 'trashable'
 require_dependency 'archetype'
 
 class Topic < ActiveRecord::Base
diff --git a/app/models/user.rb b/app/models/user.rb
index 80d3c3bdf55..244af8ad0bb 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -6,7 +6,6 @@ require_dependency 'summarize'
 require_dependency 'discourse'
 require_dependency 'post_destroyer'
 require_dependency 'user_name_suggester'
-require_dependency 'roleable'
 require_dependency 'pretty_text'
 require_dependency 'url_helper'
 
diff --git a/lib/concern/positionable.rb b/lib/concern/positionable.rb
deleted file mode 100644
index fdeaf2f6fa9..00000000000
--- a/lib/concern/positionable.rb
+++ /dev/null
@@ -1,39 +0,0 @@
-module Concern
-  module Positionable
-    extend ActiveSupport::Concern
-
-    def move_to(position_arg)
-
-      position = [[position_arg, 0].max, self.class.count - 1].min
-
-      if self.position.nil? or position > self.position
-        self.exec_sql "
-        UPDATE #{self.class.table_name}
-        SET position = position - 1
-        WHERE position > :current_position and position <= :new_position",
-        {current_position: self.position, new_position: position}
-      elsif position < self.position
-        self.exec_sql "
-        UPDATE #{self.class.table_name}
-        SET position = position + 1
-        WHERE position >= :new_position and position < :current_position",
-        {current_position: self.position, new_position: position}
-      else
-        # Not moving to a new position
-        return
-      end
-
-      self.exec_sql "
-      UPDATE #{self.class.table_name}
-      SET position = :position
-      WHERE id = :id", {id: id, position: position}
-    end
-
-    def use_default_position
-      self.exec_sql "
-      UPDATE #{self.class.table_name}
-      SET POSITION = null
-      WHERE id = :id", {id: id}
-    end
-  end
-end
diff --git a/spec/components/concern/positionable_spec.rb b/spec/components/concern/positionable_spec.rb
index 82895ae75d5..8da6afb86f3 100644
--- a/spec/components/concern/positionable_spec.rb
+++ b/spec/components/concern/positionable_spec.rb
@@ -1,7 +1,6 @@
 require "spec_helper"
-require_dependency "concern/positionable"
 
-describe Concern::Positionable do
+describe Positionable do
 
   def positions
     TestItem.order('position asc, id asc').pluck(:id)
@@ -10,7 +9,7 @@ describe Concern::Positionable do
   context "move_to" do
     before do
       class TestItem < ActiveRecord::Base
-        include Concern::Positionable
+        include Positionable
       end
 
       Topic.exec_sql("create temporary table test_items(id int primary key, position int)")