1diff --git i/tests/test_asyncio.py w/tests/test_asyncio.py 2index 39d9e1a..05b7e6f 100644 3--- i/tests/test_asyncio.py 4+++ w/tests/test_asyncio.py 5@@ -69,7 +69,7 @@ class AsyncioTests(test_utils.TestCase): 6 def step_future(): 7 future = asyncio.Future() 8 self.loop.call_soon(future.set_result, "asyncio.Future") 9- return (yield from future) 10+ return (yield From(future)) 11 12 # test in release mode 13 trollius.coroutines._DEBUG = False