diff --git a/fire/test_components_py3.py b/fire/test_components_py3.py
index 5140921..9c76ca5 100644
--- a/fire/test_components_py3.py
+++ b/fire/test_components_py3.py
@@ -56,9 +56,8 @@ def lru_cache_decorated(arg1):
 
 
 class WithAsyncio(object):
-
-  @asyncio.coroutine
-  def double(self, count=0):
+ 
+  async def double(self, count=0):
     return 2 * count