Pilot error or ZenTest issue

Consider this issue report:

http://rubyforge.org/tracker/index.php?func=detail&aid=6241&group_id=419&atid=1678

It says I installed ZenTest, edited my test_helper.rb to change the
test suites to Test::Rails, and instantly got an error with this
member missing:

    self.use_transactional_fixtures = true

Because this is on a freshly generate Rails site, with no other lines
of code that could derail a healthy ZenTest, I wonder if ZenTest is
behind the times (specifically Rails 1.1.6), or if I'm doing something
wrong.

How to install ZenTest better than this page?

http://zentest.rubyforge.org/classes/Test/Rails.html