diff --git a/tests/test_asyncio.py b/tests/test_asyncio.py
index 805ebbc..bc83f9b 100644
--- a/tests/test_asyncio.py
+++ b/tests/test_asyncio.py
@@ -189,6 +189,8 @@ async def task(self):
 
     async def start(self):
         self.add_task(self.task())
+        # ensure task scheduled by asyncio event loop
+        await asyncio.sleep(0)
 
 
 @pytest.mark.asyncio