diff --git a/railties/lib/initializer.rb b/railties/lib/initializer.rb
index 4f09dd45a3..6b9a5ae2ae 100644
--- a/railties/lib/initializer.rb
+++ b/railties/lib/initializer.rb
@@ -502,6 +502,8 @@ module Rails
         else
           Pathname.new(::RAILS_ROOT).realpath.to_s
         end
+
+      ::RAILS_ROOT.replace @root_path
     end
 
     # Loads and returns the contents of the #database_configuration_file. The
diff --git a/railties/test/fixtures/environment_with_constant.rb b/railties/test/fixtures/environment_with_constant.rb
index 1c7120655e..23e1f7afd9 100644
--- a/railties/test/fixtures/environment_with_constant.rb
+++ b/railties/test/fixtures/environment_with_constant.rb
@@ -1 +1 @@
-$initialize_test_set_from_env = "success"
+$initialize_test_set_from_env = 'success'
diff --git a/railties/test/initializer_test.rb b/railties/test/initializer_test.rb
index 86f7569c50..cf333e878e 100644
--- a/railties/test/initializer_test.rb
+++ b/railties/test/initializer_test.rb
@@ -1,25 +1,14 @@
-$:.unshift File.dirname(__FILE__) + "/../lib"
-$:.unshift File.dirname(__FILE__) + "/../../activesupport/lib"
-
-require 'test/unit'
-require 'active_support'
+require "#{File.dirname(__FILE__)}/abstract_unit"
 require 'initializer'
 
 class InitializerTest < Test::Unit::TestCase
   class ConfigurationMock < Rails::Configuration
+    attr_reader :environment_path
+
     def initialize(envpath)
       super()
-      @envpath = envpath
+      @environment_path = envpath
     end
-    
-    def environment_path
-      @envpath
-    end
-
-    protected
-      def root_path
-        File.dirname(__FILE__)
-      end
   end
 
   def test_load_environment_with_constant