diff --git a/lib/acts_as_tree.rb b/lib/acts_as_tree.rb
index 65cb8f3..d91d027 100644
--- a/lib/acts_as_tree.rb
+++ b/lib/acts_as_tree.rb
@@ -383,6 +383,3 @@ def update_parents_counter_cache
     end
   end
 end
-
-# Deprecating the following code in the future.
-require 'acts_as_tree/active_record/acts/tree'
diff --git a/lib/acts_as_tree/active_record/acts/tree.rb b/lib/acts_as_tree/active_record/acts/tree.rb
deleted file mode 100644
index 583010c..0000000
--- a/lib/acts_as_tree/active_record/acts/tree.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-require 'acts_as_tree'
-
-module ActiveRecord
-  module Acts #:nodoc:
-    module Tree
-      include ::ActsAsTree
-
-      def self.included(base)
-        Kernel.warn "[DEPRECATION] The module ActiveRecord::Acts::Tree has moved to ActsAsTree"
-
-        base.extend ::ActsAsTree::ClassMethods
-      end
-    end
-  end
-end
diff --git a/test/acts_as_tree_test.rb b/test/acts_as_tree_test.rb
index 2773a4f..462cfab 100644
--- a/test/acts_as_tree_test.rb
+++ b/test/acts_as_tree_test.rb
@@ -3,7 +3,7 @@
 require 'active_record'
 require 'acts_as_tree'
 
-class ActsAsTreeTestCase < (defined?(MiniTest::Test) ? MiniTest::Test : MiniTest::Unit::TestCase)
+class ActsAsTreeTestCase < (defined?(Minitest::Test) ? Minitest::Test : Minitest::Unit::TestCase)
   UPDATE_METHOD = ActiveRecord::VERSION::MAJOR >= 4 ? :update : :update_attributes
 
   def assert_queries(num = 1, &block)
@@ -628,4 +628,3 @@ def test_alias_tree_level
     assert_equal 'Has Level Column', @level_column.level
   end
 end
-