I think you missed my point, which was that the COLLATE clause above seemed particularly pointless. But I agree that all these are not much use, so I'll remove them as you suggest.
Maybe there has been some miscommunication, please let me try to explain myself a little better. The whole test is an attempt to mimic collate.linux.utf8, which has that same command, only for collate 'tr_TR', and so does collate.icu.utf8 but commented out.
I've seen that you have committed this and now drongo is green, which is great. Thank you for taking care of it.