Topic: rails 2.3.2 Activesupport issue on ruby 1.9.3

Hi,
Am moving my rails 2.3.2 application from ruby 1.8 to ruby 1.9.3.-p125.
When am starting console. am getting below error

home/xyz/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-2.3.2/lib/active_support/test_case.rb:20:in `alias_method': undefined method `name' for class `ActiveSupport::TestCase' (NameError)

thanks in advance