The simplest repro:

>>> type A[X, **Y] = None
>>> A[int, [str]]
A[int, [<class 'str'>]]

I think that it should be:

>>> type A[X, **Y] = None
>>> A[int, [str]]
A[int, [str]]

We already had similar issues in the past: #102637

This happens somewhere in ga_repr, I will have a look.

Linked PRs

• gh-105486: Change the repr of ParamSpec list of args in GenericAlias #105488
• [3.12] gh-105486: Change the repr of ParamSpec list of args in GenericAlias (GH-105488) #106297