diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
@@ -542,17 +542,17 @@ def ensure_future(coro_or_future, *, loop=None):

    If the argument is a Future, it is returned directly.
    """
-    if futures.isfuture(coro_or_future):
-        if loop is not None and loop is not futures._get_loop(coro_or_future):
-            raise ValueError('loop argument must agree with Future')
-        return coro_or_future
-    elif coroutines.iscoroutine(coro_or_future):
        if loop is None:
            loop = events.get_event_loop()
        task = loop.create_task(coro_or_future)
        if task._source_traceback:
            del task._source_traceback[-1]
        return task
    elif inspect.isawaitable(coro_or_future):
        return ensure_future(_wrap_awaitable(coro_or_future), loop=loop)
    else:

diff --git a/Misc/NEWS.d/next/Library/2018-05-14-18-05-35.bpo-33505.L8pAyt.rst b/Misc/NEWS.d/next/Library/2018-05-14-18-05-35.bpo-33505.L8pAyt.rst
@@ -0,0 +1 @@