Fix failing ARes isolated tests

activeresource/Rakefile

@@ -34,11 +34,12 @@ Rake::TestTask.new { |t|
   t.verbose = true
   t.warning = true
 }
+
 task :isolated_test do
   ruby = File.join(*RbConfig::CONFIG.values_at('bindir', 'RUBY_INSTALL_NAME'))
   activesupport_path = "#{File.dirname(__FILE__)}/../activesupport/lib"
   Dir.glob("test/**/*_test.rb").all? do |file|
-    system(ruby, "-Ilib:test:#{activesupport_path}", file)
+    system(ruby, '-w', "-Ilib:test:#{activesupport_path}", file)
   end or raise "Failures"
 end
 

activeresource/test/cases/observing_test.rb

 require 'abstract_unit'
+require 'fixtures/person'
+require 'active_support/core_ext/hash/conversions'
 
 class ObservingTest < Test::Unit::TestCase
   cattr_accessor :history

activeresource/test/cases/validations_test.rb

 require 'abstract_unit'
-require "fixtures/project"
+require 'fixtures/project'
+require 'active_support/core_ext/hash/conversions'
 
 # The validations are tested thoroughly under ActiveModel::Validations
 # This test case simply makes sur that they are all accessible by