activerecord-3.0.5/test/cases/timestamp_test.rb fails.

I have got following error when running activerecord test suite ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux]

1) Failure: test_saving_a_unchanged_record_doesnt_update_its_timestamp(TimestampTest)

[/builddir/build/BUILD/rubygem-activerecord-3.0.5/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.5/test/cases/timestamp_test.rb:29:in `test_saving_a_unchanged_record_doesnt_update_its_timestamp'
 /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.5/lib/active_support/testing/setup_and_teardown.rb:67:in `__send__'
 /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.5/lib/active_support/testing/setup_and_teardown.rb:67:in `run'
 /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.5/lib/active_support/callbacks.rb:418:in `_run_setup_callbacks'
 /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.5/lib/active_support/testing/setup_and_teardown.rb:65:in `run']:

expected but was
.

I have added some debug output to the test:

p @previously_updated_at.to_f
p @developer.updated_at.to_f

and it outputs:

1301313170.0
1301313170.6389

So apparently, the timestamps are different. Either test or better the save internals should be fixed IMO.