alternate stdlib.h best practice??

[bd2357]

I am doing some work using the pi pico sdk and I want to know the best way to mock out certain sdk headers. My problem is someone thought it was a good idea to name a header "pico/stdlib.h".
I want to mock out this library but obviously don't want to mock out <stdlib.h> how do I do this in the test_ file or in the project.yml file???