stubtest false positive: default (list,) incompatible with tuple[type[list[_T]]]

Bug Report

Mypy stubtests report a false positive for a signature of tuple[type[list[_T]]] and a default value of (list,).
Removing either the wrapping tuple or the TypeVar is accepted.

To Reproduce

def foo1(x = (list,)): ...
def foo2(x = (list,)): ...
def foo3(x = list): ...

from typing import TypeVar

_T = TypeVar('_T')

def foo1(x: tuple[type[list[_T]]] = ...): ...
def foo2(x: tuple[type[list]] = ...): ...
def foo3(x: type[list[_T]] = ...): ...

Expected Behavior

Stubtests accept this

Actual Behavior

$ python -m mypy.stubtest lib
error: lib.foo1 is inconsistent, runtime parameter "x" has a default value of type tuple[Overload(def [_T] () -> builtins.list[_T`1], def [_T] (typing.Iterable[_T`1]) -> builtins.list[_T`1])], which is incompatible with stub parameter type tuple[type[builtins.list[_T`-1]]]
Stub: in file D:\Programming\Projects\Testing\lib.pyi:5
def [_T] (x: tuple[type[builtins.list[_T`-1]]] =) -> Any
Runtime: in file D:\Programming\Projects\Testing\lib.py:1
def (x=(<class 'list'>,))

Found 1 error (checked 1 module)

Your Environment

Command: python -m mypy.stubtest lib
Python Version: Python 3.11.3
Mypy Version: mypy 1.18.1 (compiled: yes)

From: https://github.com/python/typeshed/issues/14718#issuecomment-3290882846

Start by reproducing the report with Python 3.11.3 using python -m mypy.stubtest lib, comparing the signatures in lib.py and lib.pyi. Trace how stubtest evaluates the runtime default (list,) against tuple[type[list[_T]]]; done means the reported foo1 mismatch is accepted while the existing foo2 and foo3 cases remain covered.