diff --git a/stdlib/tempfile.pyi b/stdlib/tempfile.pyi
index f4e608198..018885d08 100644
--- a/stdlib/tempfile.pyi
+++ b/stdlib/tempfile.pyi
@@ -295,7 +295,7 @@ class SpooledTemporaryFile(IO[AnyStr]):
     def __enter__(self: Self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None
-    ) -> bool | None: ...
+    ) -> None: ...
     # These methods are copied from the abstract methods of IO, because
     # SpooledTemporaryFile implements IO.
     # See also https://github.com/python/typeshed/pull/2452#issuecomment-420657918.
@@ -308,7 +308,7 @@ class SpooledTemporaryFile(IO[AnyStr]):
     def readlines(self, hint: int = ...) -> list[AnyStr]: ...
     def seek(self, offset: int, whence: int = ...) -> int: ...
     def tell(self) -> int: ...
-    def truncate(self, size: int | None = ...) -> int: ...
+    def truncate(self, size: int | None = ...) -> None: ...  # type: ignore[override]
     def write(self, s: AnyStr) -> int: ...
     def writelines(self, iterable: Iterable[AnyStr]) -> None: ...
     def __iter__(self) -> Iterator[AnyStr]: ...