1 files changed, 18 insertions, 1 deletions
diff --git a/t/unit/asynchronous/test_hub.py b/t/unit/asynchronous/test_hub.py
index bcbbb260..27b048b9 100644
--- a/t/unit/asynchronous/test_hub.py
+++ b/t/unit/asynchronous/test_hub.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import errno
-from unittest.mock import Mock, call, patch
+from unittest.mock import ANY, Mock, call, patch
 
 import pytest
 from vine import promise
@@ -542,6 +542,23 @@ class test_Hub:
         callbacks[1].assert_called_once_with()
         deferred.assert_not_called()
 
+    def test_loop__no_todo_tick_delay(self):
+        cb = Mock(name='parent')
+        cb.todo, cb.tick, cb.poller = Mock(), Mock(), Mock()
+        cb.poller.poll.side_effect = lambda obj: ()
+        self.hub.poller = cb.poller
+        self.hub.add(2, Mock(), READ)
+        self.hub.call_soon(cb.todo)
+        self.hub.on_tick = [cb.tick]
+
+        next(self.hub.loop)
+
+        cb.assert_has_calls([
+            call.todo(),
+            call.tick(),
+            call.poller.poll(ANY),
+        ])
+
     def test__pop_ready_pops_ready_items(self):
         self.hub._ready.add(None)
         ret = self.hub._pop_ready()