diff --git a/stdlib/contextlib.pyi b/stdlib/contextlib.pyi
index 4795aac67c23..c2731dea7807 100644
--- a/stdlib/contextlib.pyi
+++ b/stdlib/contextlib.pyi
@@ -137,6 +137,9 @@ elif sys.version_info >= (3, 7):
         func: Callable[..., AsyncGenerator[_T_co, Any]]
         args: tuple[Any, ...]
         kwds: dict[str, Any]
+        async def __aexit__(
+            self, typ: type[BaseException] | None, value: BaseException | None, traceback: TracebackType | None
+        ) -> bool | None: ...
 
 if sys.version_info >= (3, 7):
     def asynccontextmanager(func: Callable[_P, AsyncIterator[_T_co]]) -> Callable[_P, _AsyncGeneratorContextManager[_T_co]]: ...
@@ -148,6 +151,7 @@ _SupportsCloseT = TypeVar("_SupportsCloseT", bound=_SupportsClose)
 
 class closing(AbstractContextManager[_SupportsCloseT]):
     def __init__(self, thing: _SupportsCloseT) -> None: ...
+    def __exit__(self, *exc_info: object) -> None: ...
 
 if sys.version_info >= (3, 10):
     class _SupportsAclose(Protocol):
@@ -156,6 +160,7 @@ if sys.version_info >= (3, 10):
 
     class aclosing(AbstractAsyncContextManager[_SupportsAcloseT]):
         def __init__(self, thing: _SupportsAcloseT) -> None: ...
+        async def __aexit__(self, *exc_info: object) -> None: ...
 
 class suppress(AbstractContextManager[None]):
     def __init__(self, *exceptions: type[BaseException]) -> None: ...
@@ -163,11 +168,14 @@ class suppress(AbstractContextManager[None]):
         self, exctype: type[BaseException] | None, excinst: BaseException | None, exctb: TracebackType | None
     ) -> bool: ...
 
-class redirect_stdout(AbstractContextManager[_T_io]):
+class _RedirectStream(AbstractContextManager[_T_io]):
     def __init__(self, new_target: _T_io) -> None: ...
+    def __exit__(
+        self, exctype: type[BaseException] | None, excinst: BaseException | None, exctb: TracebackType | None
+    ) -> None: ...
 
-class redirect_stderr(AbstractContextManager[_T_io]):
-    def __init__(self, new_target: _T_io) -> None: ...
+class redirect_stdout(_RedirectStream[_T_io]): ...
+class redirect_stderr(_RedirectStream[_T_io]): ...
 
 class ExitStack(AbstractContextManager[ExitStack]):
     def __init__(self) -> None: ...
diff --git a/stdlib/mmap.pyi b/stdlib/mmap.pyi
index 5dd266e84607..c057ab2f1b2b 100644
--- a/stdlib/mmap.pyi
+++ b/stdlib/mmap.pyi
@@ -70,6 +70,7 @@ class mmap(AbstractContextManager[mmap], Iterable[int], Sized):
     # Doesn't actually exist, but the object is actually iterable because it has __getitem__ and
     # __len__, so we claim that there is also an __iter__ to help type checkers.
     def __iter__(self) -> Iterator[int]: ...
+    def __exit__(self, *args: object) -> None: ...
 
 if sys.version_info >= (3, 8) and sys.platform != "win32":
     MADV_NORMAL: int
diff --git a/stdlib/multiprocessing/synchronize.pyi b/stdlib/multiprocessing/synchronize.pyi
index 6764b7666152..cb576abcc815 100644
--- a/stdlib/multiprocessing/synchronize.pyi
+++ b/stdlib/multiprocessing/synchronize.pyi
@@ -2,6 +2,7 @@ import sys
 import threading
 from contextlib import AbstractContextManager
 from multiprocessing.context import BaseContext
+from types import TracebackType
 from typing import Any, Callable, Union
 
 __all__ = ["Lock", "RLock", "Semaphore", "BoundedSemaphore", "Condition", "Event"]
@@ -28,8 +29,11 @@ class Condition(AbstractContextManager[bool]):
     def wait_for(self, predicate: Callable[[], bool], timeout: float | None = ...) -> bool: ...
     def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
     def release(self) -> None: ...
+    def __exit__(
+        self, __exc_type: type[BaseException] | None, __exc_val: BaseException | None, __exc_tb: TracebackType | None
+    ) -> None: ...
 
-class Event(AbstractContextManager[bool]):
+class Event:
     def __init__(self, lock: _LockLike | None = ..., *, ctx: BaseContext) -> None: ...
     def is_set(self) -> bool: ...
     def set(self) -> None: ...
@@ -49,3 +53,6 @@ class Semaphore(SemLock):
 class SemLock(AbstractContextManager[bool]):
     def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
     def release(self) -> None: ...
+    def __exit__(
+        self, __exc_type: type[BaseException] | None, __exc_val: BaseException | None, __exc_tb: TracebackType | None
+    ) -> None: ...
diff --git a/stdlib/numbers.pyi b/stdlib/numbers.pyi
index 7c0c95853741..d94ae7faf890 100644
--- a/stdlib/numbers.pyi
+++ b/stdlib/numbers.pyi
@@ -42,8 +42,11 @@ class Complex(Number):
     def __pow__(self, exponent: Any) -> Any: ...
     @abstractmethod
     def __rpow__(self, base: Any) -> Any: ...
+    @abstractmethod
     def __abs__(self) -> Real: ...
+    @abstractmethod
     def conjugate(self) -> Any: ...
+    @abstractmethod
     def __eq__(self, other: object) -> bool: ...
 
 class Real(Complex, SupportsFloat):
diff --git a/stdlib/os/__init__.pyi b/stdlib/os/__init__.pyi
index d38148e7921f..f59b2de7bc23 100644
--- a/stdlib/os/__init__.pyi
+++ b/stdlib/os/__init__.pyi
@@ -12,6 +12,7 @@ from _typeshed import (
     StrPath,
     structseq,
 )
+from abc import abstractmethod
 from builtins import OSError
 from contextlib import AbstractContextManager
 from io import BufferedRandom, BufferedReader, BufferedWriter, FileIO, TextIOWrapper as _TextIOWrapper
@@ -371,6 +372,7 @@ class stat_result(structseq[float], tuple[int, int, int, int, int, int, int, flo
 
 @runtime_checkable
 class PathLike(Protocol[_AnyStr_co]):
+    @abstractmethod
     def __fspath__(self) -> _AnyStr_co: ...
 
 @overload
@@ -722,6 +724,7 @@ def rmdir(path: StrOrBytesPath, *, dir_fd: int | None = ...) -> None: ...
 
 class _ScandirIterator(Iterator[DirEntry[AnyStr]], AbstractContextManager[_ScandirIterator[AnyStr]]):
     def __next__(self) -> DirEntry[AnyStr]: ...
+    def __exit__(self, *args: object) -> None: ...
     def close(self) -> None: ...
 
 if sys.version_info >= (3, 7):
diff --git a/stdlib/pathlib.pyi b/stdlib/pathlib.pyi
index fc5d7d8fb7e1..eead11dd310b 100644
--- a/stdlib/pathlib.pyi
+++ b/stdlib/pathlib.pyi
@@ -39,6 +39,7 @@ class PurePath(PathLike[str]):
     def __new__(cls: type[Self], *args: StrPath) -> Self: ...
     def __hash__(self) -> int: ...
     def __eq__(self, other: object) -> bool: ...
+    def __fspath__(self) -> str: ...
     def __lt__(self, other: PurePath) -> bool: ...
     def __le__(self, other: PurePath) -> bool: ...
     def __gt__(self, other: PurePath) -> bool: ...
diff --git a/stdlib/typing.pyi b/stdlib/typing.pyi
index 08fb6d5b433b..a874a0ddd25c 100644
--- a/stdlib/typing.pyi
+++ b/stdlib/typing.pyi
@@ -902,6 +902,7 @@ class ValuesView(MappingView, Iterable[_VT_co], Generic[_VT_co]):
 @runtime_checkable
 class ContextManager(Protocol[_T_co]):
     def __enter__(self) -> _T_co: ...
+    @abstractmethod
     def __exit__(
         self, __exc_type: Type[BaseException] | None, __exc_value: BaseException | None, __traceback: TracebackType | None
     ) -> bool | None: ...
@@ -909,6 +910,7 @@ class ContextManager(Protocol[_T_co]):
 @runtime_checkable
 class AsyncContextManager(Protocol[_T_co]):
     async def __aenter__(self) -> _T_co: ...
+    @abstractmethod
     async def __aexit__(
         self, __exc_type: Type[BaseException] | None, __exc_value: BaseException | None, __traceback: TracebackType | None
     ) -> bool | None: ...