diff --git a/stdlib/contextlib.pyi b/stdlib/contextlib.pyi
index abf3df6b2..66e7262d3 100644
--- a/stdlib/contextlib.pyi
+++ b/stdlib/contextlib.pyi
@@ -112,7 +112,19 @@ if sys.version_info >= (3, 7):
             __traceback: Optional[TracebackType],
         ) -> Awaitable[bool]: ...
 
-if sys.version_info >= (3, 7):
+if sys.version_info >= (3, 10):
+    class nullcontext(AbstractContextManager[_T], AbstractAsyncContextManager[_T]):
+        enter_result: _T
+        @overload
+        def __init__(self: nullcontext[None], enter_result: None = ...) -> None: ...
+        @overload
+        def __init__(self: nullcontext[_T], enter_result: _T) -> None: ...
+        def __enter__(self) -> _T: ...
+        def __exit__(self, *exctype: Any) -> None: ...
+        async def __aenter__(self) -> _T: ...
+        async def __aexit__(self, *exctype: Any) -> None: ...
+
+elif sys.version_info >= (3, 7):
     class nullcontext(AbstractContextManager[_T]):
         enter_result: _T
         @overload
@@ -120,4 +132,4 @@ if sys.version_info >= (3, 7):
         @overload
         def __init__(self: nullcontext[_T], enter_result: _T) -> None: ...
         def __enter__(self) -> _T: ...
-        def __exit__(self, *exctype: Any) -> bool: ...
+        def __exit__(self, *exctype: Any) -> None: ...