diff --git a/stdlib/3/asyncio/tasks.pyi b/stdlib/3/asyncio/tasks.pyi
index e8f98bcb2..6a193f428 100644
--- a/stdlib/3/asyncio/tasks.pyi
+++ b/stdlib/3/asyncio/tasks.pyi
@@ -60,9 +60,9 @@ def wait_for(fut: _FutureT[_T], timeout: Optional[float],
 
 class Task(Future[_T], Generic[_T]):
     @classmethod
-    def current_task(cls, loop: AbstractEventLoop = ...) -> Task: ...
+    def current_task(cls, loop: Optional[AbstractEventLoop] = ...) -> Task: ...
     @classmethod
-    def all_tasks(cls, loop: AbstractEventLoop = ...) -> Set[Task]: ...
+    def all_tasks(cls, loop: Optional[AbstractEventLoop] = ...) -> Set[Task]: ...
     def __init__(self, coro: Union[Generator[Any, None, _T], Awaitable[_T]], *, loop: AbstractEventLoop = ...) -> None: ...
     def __repr__(self) -> str: ...
     def get_stack(self, *, limit: int = ...) -> List[FrameType]: ...