I would go to the source, the F-SIMS. what we used to call the "Inspector's Handbook." I put all this in because it explains the Type Ratings are upgraded (in category and class) which might be where the idea the category and class would be upgraded on any checkride. Read all the way through to the last paragraph.
5-705 PILOT CERTIFICATE LEVEL AND CATEGORY AND CLASS RATING. The category and class rating(s) for which the applicant has qualified on the original or subsequent ATP practical tests are entered on the ATP certificate. The following are the aircraft category and class ratings for the ATP certificate:
A. ATP Certificate.
· Airplane Single-Engine Land,
· Airplane Single-Engine Sea,
· Airplane Multiengine Land,
· Airplane Multiengine Sea,
· Rotorcraft Helicopter, and
· Powered-Lift.
B. Type Ratings. Type rating tests are conducted to the ATP standard for all grades of pilot certificate. Therefore, all type ratings in that category and class of aircraft for which the practical test is conducted in are upgraded after successful completion of the practical test. For example, a person who holds a B-737, DC-3, and SK-62 at the commercial pilot certificate level, and later satisfactorily completes an ATP practical test in a CE-750, would have his/her B-737 and DC-3 type ratings elevated up to the ATP certificate level. The SK-62 would not elevate up because the practical test was in a multiengine airplane. However, when the person satisfactorily completes an ATP practical test in a helicopter, the SK-62 would then elevate up to the ATP certificate level. Therefore, all of the type ratings held on the superseded certificate carry forward at the new certificate level within category and class.
NOTE: A type rating for a single-engine airplane may not be upgraded to the ATP level.
1) Except for type ratings and, under some circumstances, the instrument rating, other ratings indicated on the superseded pilot certificate are carried forward at the commercial, private, or recreational level, as indicated on the superseded certificate.