Comment 1 for bug 436712

No page makes URLs with the project under the project group. Google does not know of any such URLs.

There is one code point to change. It shoule read:

ProjectNavigation.traverse
...
    return self.redirectSubTree(canonical_url(self.context.getProduct(name)))

There is no explict tests that say a project should appear under a projectgroup but it is implicitly shown in
    xx-project-add-product.txt
The test can be fixed to use the correct URL

A good unit test will use test_branchtraversal as guide (.assertRedirects, .tranverse)