diff --git a/docs/README.rst b/docs/README.rst
index d4f0066a..b557e9e2 100644
--- a/docs/README.rst
+++ b/docs/README.rst
@@ -347,6 +347,7 @@ Check out our experimental system for `guest-mode`_ controlled
         while True:
             # echo the msg back
             to_trio.send_nowait(await from_trio.get())
+            await asyncio.sleep(0)
 
 
     @tractor.context
diff --git a/examples/infected_asyncio_echo_server.py b/examples/infected_asyncio_echo_server.py
index aeda42cf..ee7c45bf 100644
--- a/examples/infected_asyncio_echo_server.py
+++ b/examples/infected_asyncio_echo_server.py
@@ -25,6 +25,7 @@ async def aio_echo_server(
     while True:
         # echo the msg back
         to_trio.send_nowait(await from_trio.get())
+        await asyncio.sleep(0)
 
 
 @tractor.context