Change links

If “test” is a broadcasted and linked page, then you can use the Local Links add-on, which detects broadcasted links and replaces them on each child.

If you just want a plain ‘ol “replace x with y” thing, then perhaps the Search And Replace add-on will solve your problem.

Or if you’ve got time to code a custom solution, the code snippets I provide can perhaps help you on your way?