diff --git a/stdlib/types.pyi b/stdlib/types.pyi
index abff72c0a74c..dca313107de9 100644
--- a/stdlib/types.pyi
+++ b/stdlib/types.pyi
@@ -174,7 +174,7 @@ class CodeType:
 class MappingProxyType(Mapping[_KT, _VT_co], Generic[_KT, _VT_co]):
     __hash__: None  # type: ignore[assignment]
     def __init__(self, mapping: SupportsKeysAndGetItem[_KT, _VT_co]) -> None: ...
-    def __getitem__(self, k: _KT) -> _VT_co: ...
+    def __getitem__(self, __k: _KT) -> _VT_co: ...
     def __iter__(self) -> Iterator[_KT]: ...
     def __len__(self) -> int: ...
     def copy(self) -> dict[_KT, _VT_co]: ...
@@ -190,9 +190,9 @@ class MappingProxyType(Mapping[_KT, _VT_co], Generic[_KT, _VT_co]):
 class SimpleNamespace:
     __hash__: None  # type: ignore[assignment]
     def __init__(self, **kwargs: Any) -> None: ...
-    def __getattribute__(self, name: str) -> Any: ...
-    def __setattr__(self, name: str, value: Any) -> None: ...
-    def __delattr__(self, name: str) -> None: ...
+    def __getattribute__(self, __name: str) -> Any: ...
+    def __setattr__(self, __name: str, __value: Any) -> None: ...
+    def __delattr__(self, __name: str) -> None: ...
 
 class ModuleType:
     __name__: str
@@ -305,7 +305,7 @@ if sys.version_info >= (3, 7):
         __qualname__: str
         __objclass__: type
         def __call__(self, *args: Any, **kwargs: Any) -> Any: ...
-        def __get__(self, obj: Any, type: type = ...) -> Any: ...
+        def __get__(self, __obj: Any, __type: type = ...) -> Any: ...
 
     @final
     class MethodWrapperType:
@@ -314,8 +314,8 @@ if sys.version_info >= (3, 7):
         __qualname__: str
         __objclass__: type
         def __call__(self, *args: Any, **kwargs: Any) -> Any: ...
-        def __eq__(self, other: object) -> bool: ...
-        def __ne__(self, other: object) -> bool: ...
+        def __eq__(self, __other: object) -> bool: ...
+        def __ne__(self, __other: object) -> bool: ...
 
     @final
     class MethodDescriptorType:
@@ -374,7 +374,7 @@ class GetSetDescriptorType:
     __objclass__: type
     def __get__(self, __obj: Any, __type: type = ...) -> Any: ...
     def __set__(self, __instance: Any, __value: Any) -> None: ...
-    def __delete__(self, obj: Any) -> None: ...
+    def __delete__(self, __obj: Any) -> None: ...
 
 @final
 class MemberDescriptorType:
@@ -383,7 +383,7 @@ class MemberDescriptorType:
     __objclass__: type
     def __get__(self, __obj: Any, __type: type = ...) -> Any: ...
     def __set__(self, __instance: Any, __value: Any) -> None: ...
-    def __delete__(self, obj: Any) -> None: ...
+    def __delete__(self, __obj: Any) -> None: ...
 
 if sys.version_info >= (3, 7):
     def new_class(
@@ -442,5 +442,5 @@ if sys.version_info >= (3, 10):
     @final
     class UnionType:
         __args__: tuple[Any, ...]
-        def __or__(self, obj: Any) -> UnionType: ...
-        def __ror__(self, obj: Any) -> UnionType: ...
+        def __or__(self, __obj: Any) -> UnionType: ...
+        def __ror__(self, __obj: Any) -> UnionType: ...