Hack in env variable setting for Dependencies.mechanism

activesupport/lib/active_support/dependencies.rb

@@ -21,7 +21,7 @@ module Dependencies #:nodoc:
 
     # Should we load files or require them?
     mattr_accessor :mechanism
-    self.mechanism = :load
+    self.mechanism = ENV['NO_RELOAD'] ? :require : :load
 
     # The set of directories from which we may automatically load files. Files
     # under these directories will be reloaded on each request in development mode,

activesupport/test/abstract_unit.rb

@@ -4,6 +4,7 @@
 gem 'mocha', '>= 0.9.5'
 require 'mocha'
 
+ENV['NO_RELOAD'] = '1'
 $:.unshift "#{File.dirname(__FILE__)}/../lib"
 require 'active_support'
 require 'active_support/test_case'