The FAA IR test doesn't really do that - you know you're going to transition to IFR pretty soon, and have an "adjust time" while putting on the hood.
My FAA IR instructor often made me practice "under the hood" takeoffs, using the DI to keep runway heading until rotate (and after too!).
The FAA system is dependent on the instructors "signing you off" as ready, the test can't cover everything....
Ian