Tests not running in shoplet project

I’m working through Ola B.'s book but I’m using jruby 1.1.2 and Rails
2.0.2 (not sure if this should go in the Rails forum or not)

When I try to run the simplest tests it finishes in 0.0010 seconds and
claims to have run 0 tests.

It appears to find the unit test files but doesn’t run the tests. Does
anyone know where I should be looking for the answer here? Is this an
indication that my code it wrong or that my config is wrong?

Here is the trace:

jruby -S rake --trace
(in /Users/rosey/Projects/Ruby/shoplet)
** Invoke default (first_time)
** Invoke test (first_time)
** Execute test
** Invoke test:units (first_time)
** Invoke db:test:prepare (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:abort_if_pending_migrations (first_time)
** Invoke environment
** Execute db:abort_if_pending_migrations
** Execute db:test:prepare
** Invoke db:test:clone (first_time)
** Invoke db:schema:dump (first_time)
** Invoke environment
** Execute db:schema:dump
** Invoke db:test:purge (first_time)
** Invoke environment
** Execute db:test:purge
** Execute db:test:clone
** Invoke db:schema:load (first_time)
** Invoke environment
** Execute db:schema:load
** Execute test:units
/usr/local/ruby/jruby-1.1.2/bin/jruby -Ilib:test
“/usr/local/ruby/jruby-1.1.2/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader.rb”
“test/unit/product_category_test.rb” “test/unit/product_test.rb”
“test/unit/product_type_test.rb”
JRuby limited openssl loaded. gem install jruby-openssl for full
support.
http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
Loaded suite
/usr/local/ruby/jruby-1.1.2/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader
Started

Finished in 0.0010 seconds.

0 tests, 0 assertions, 0 failures, 0 errors
** Invoke test:functionals (first_time)
** Invoke db:test:prepare
** Execute test:functionals
/usr/local/ruby/jruby-1.1.2/bin/jruby -Ilib:test
“/usr/local/ruby/jruby-1.1.2/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader.rb”
** Invoke test:integration (first_time)
** Invoke db:test:prepare
** Execute test:integration
/usr/local/ruby/jruby-1.1.2/bin/jruby -Ilib:test
“/usr/local/ruby/jruby-1.1.2/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader.rb”
** Execute default