diff --git a/stdlib/__main__.pyi b/stdlib/__main__.pyi
index 5b0f74feb261..3536a6f021c5 100644
--- a/stdlib/__main__.pyi
+++ b/stdlib/__main__.pyi
@@ -1 +1 @@
-def __getattr__(name: str): ...  # incomplete module
+def __getattr__(name: str, /): ...  # incomplete module
diff --git a/stdlib/_ctypes.pyi b/stdlib/_ctypes.pyi
index d800ac5c20d0..36365cea3aa8 100644
--- a/stdlib/_ctypes.pyi
+++ b/stdlib/_ctypes.pyi
@@ -249,7 +249,7 @@ class _UnionType(_CTypeBaseType):
     # At runtime, various attributes are created on a Union subclass based
     # on its _fields_. This method doesn't exist, but represents those
     # dynamically created attributes.
-    def __getattr__(self, name: str) -> _CField[Any, Any, Any]: ...
+    def __getattr__(self, name: str, /) -> _CField[Any, Any, Any]: ...
     if sys.version_info < (3, 13):
         # Inherited from CType_Type starting on 3.13
         def __mul__(cls: type[_CT], other: int) -> type[Array[_CT]]: ...  # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues]
@@ -263,8 +263,8 @@ class Union(_CData, metaclass=_UnionType):
         _align_: ClassVar[int]
 
     def __init__(self, *args: Any, **kw: Any) -> None: ...
-    def __getattr__(self, name: str) -> Any: ...
-    def __setattr__(self, name: str, value: Any) -> None: ...
+    def __getattr__(self, name: str, /) -> Any: ...
+    def __setattr__(self, name: str, value: Any, /) -> None: ...
 
 # This class is not exposed. It calls itself _ctypes.PyCStructType.
 @type_check_only
@@ -277,7 +277,7 @@ class _PyCStructType(_CTypeBaseType):
     # At runtime, various attributes are created on a Structure subclass based
     # on its _fields_. This method doesn't exist, but represents those
     # dynamically created attributes.
-    def __getattr__(self, name: str) -> _CField[Any, Any, Any]: ...
+    def __getattr__(self, name: str, /) -> _CField[Any, Any, Any]: ...
     if sys.version_info < (3, 13):
         # Inherited from CType_Type starting on 3.13
         def __mul__(cls: type[_CT], other: int) -> type[Array[_CT]]: ...  # type: ignore[misc] # pyright: ignore[reportGeneralTypeIssues]
@@ -295,7 +295,7 @@ class Structure(_CData, metaclass=_PyCStructType):
         _layout_: ClassVar[Literal["ms", "gcc-sysv"]]
 
     def __init__(self, *args: Any, **kw: Any) -> None: ...
-    def __getattr__(self, name: str) -> Any: ...
+    def __getattr__(self, name: str, /) -> Any: ...
     def __setattr__(self, name: str, value: Any) -> None: ...
 
 # This class is not exposed. It calls itself _ctypes.PyCArrayType.
diff --git a/stubs/tensorflow/tensorflow/python/__init__.pyi b/stubs/tensorflow/tensorflow/python/__init__.pyi
index 5b0f74feb261..3536a6f021c5 100644
--- a/stubs/tensorflow/tensorflow/python/__init__.pyi
+++ b/stubs/tensorflow/tensorflow/python/__init__.pyi
@@ -1 +1 @@
-def __getattr__(name: str): ...  # incomplete module
+def __getattr__(name: str, /): ...  # incomplete module
diff --git a/stubs/tensorflow/tensorflow/python/keras/__init__.pyi b/stubs/tensorflow/tensorflow/python/keras/__init__.pyi
index 5b0f74feb261..3536a6f021c5 100644
--- a/stubs/tensorflow/tensorflow/python/keras/__init__.pyi
+++ b/stubs/tensorflow/tensorflow/python/keras/__init__.pyi
@@ -1 +1 @@
-def __getattr__(name: str): ...  # incomplete module
+def __getattr__(name: str, /): ...  # incomplete module