diff --git a/src/trio/_util.py b/src/trio/_util.py
index 8c10362f9..f55f0aeca 100644
--- a/src/trio/_util.py
+++ b/src/trio/_util.py
@@ -27,11 +27,12 @@
     import sys
     from types import AsyncGeneratorType, TracebackType
 
-    from typing_extensions import TypeVarTuple, Unpack
+    from typing_extensions import ParamSpec, TypeVarTuple, Unpack
 
     if sys.version_info < (3, 11):
         from exceptiongroup import BaseExceptionGroup
 
+    P = ParamSpec("P")
     PosArgsT = TypeVarTuple("PosArgsT")
 
 
@@ -287,8 +288,9 @@ def __call__(cls, *args: object, **kwargs: object) -> None:
             f"{cls.__module__}.{cls.__qualname__} has no public constructor",
         )
 
-    def _create(cls: type[T], *args: object, **kwargs: object) -> T:
-        return super().__call__(*args, **kwargs)  # type: ignore
+    def _create(cls: Callable[P, T], *args: P.args, **kwargs: P.kwargs) -> T:
+        # misc = unsupported argument 2 for "super" (??)
+        return super().__call__(*args, **kwargs)  # type: ignore[misc,no-any-return]
 
 
 def name_asyncgen(agen: AsyncGeneratorType[object, NoReturn]) -> str:
diff --git a/src/trio/testing/_fake_net.py b/src/trio/testing/_fake_net.py
index 4fed1b0bd..71b5d72fd 100644
--- a/src/trio/testing/_fake_net.py
+++ b/src/trio/testing/_fake_net.py
@@ -123,7 +123,7 @@ def reply(self, payload: bytes) -> UDPPacket:  # pragma: no cover
 class FakeSocketFactory(trio.abc.SocketFactory):
     fake_net: FakeNet
 
-    def socket(self, family: int, type_: int, proto: int) -> FakeSocket:  # type: ignore[override]
+    def socket(self, family: AddressFamily, type_: SocketKind, proto: int) -> FakeSocket:  # type: ignore[override]
         return FakeSocket._create(self.fake_net, family, type_, proto)