Brian Stanley (Laois-Offaly, Sinn Fein) | Oireachtas source

I refer to another reply from Revenue where the question read:

A test case regarding bogus self employment amongst couriers was discussed. Please provide further details in relation to this case including detailing any associated costs.

The reply stated:

Reference to a “test case" regarding bogus self employment amongst couriers had been raised at the Joint Oireachtas Committee on Employment Affairs in 2019. There is no one specific "test" case. However, couriers were regarded as self employed for PRSI purposes as a result of a Social Welfare Appeals Officer’s decision.

As I understand it, that is one case. It does not refer to "decisions of" but to "a decision". I take that to mean a single case.