diff --git a/asyncio_micro/asyncio_micro.py b/asyncio_micro/asyncio_micro.py
index a46b3d25..46fc6058 100644
--- a/asyncio_micro/asyncio_micro.py
+++ b/asyncio_micro/asyncio_micro.py
@@ -82,6 +82,9 @@ class EventLoop:
                                 self.remove_writer(ret.obj.fileno())
                     elif isinstance(ret, type_gen):
                         self.call_soon(ret)
+                    elif ret is None:
+                        # Just reschedule
+                        pass
                     else:
                         print(ret, type(ret))
                         assert False