Problems testing generated plugin

I'm using Rails 2.3.4. I'm trying to write a plugin, so I used the
generator to create the barebones plugin. Loving TDD, I got into the
test file and make some changes. Expecting them to fail I go into the
plugin directory and run 'rake test.' No output--just the command
showing rake_test_loader and the files. I go back into the app root
and try rake test:plugins. Same thing. I see no info about assertions,
nothing about the test that should be failing. What gives?

If I generate a new rails app, I can see info about assertions from
rake test:plugins but not from running rake test inside the plugin
directory. Can anyone think of why this is?