"Shoulda" gem and code completion

Hello,

I'm using the "shoulda" gem (http://thoughtbot.com/projects/shoulda/) for writing my tests. For some unknown reason I just can't get the code completion working (Ctrl+Space or Ctrl+Alt+Space). The same is true for "assert_"

I narrowed it down that it has smth. to do with the way tests are written. When writing "normal" tests like:

def test_foo
  assert...

end

then the code completion is working inside the test_foo method. But when changing to the "shoulda" way:

context "foo" do
  ...
  should_respond_with :success

  ... 

  should "simply work" do
    assert ...

  end

end

then the code completion is not working for either "assert_*" or "should_*".

Is there any way to get the code completion working for such cases?

Thx and best regards,
Andreas