From 4a2ab56c86eb662bb1a398a7d7954dc1ecd787a4 Mon Sep 17 00:00:00 2001
From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Wed, 15 Jun 2022 11:26:33 +0000
Subject: [PATCH] GH-93850: Fix test_asyncio exception ignored tracebacks

---
 Lib/test/test_asyncio/test_runners.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Lib/test/test_asyncio/test_runners.py b/Lib/test/test_asyncio/test_runners.py
index 94d449f4791844..7780a5f15e1b44 100644
--- a/Lib/test/test_asyncio/test_runners.py
+++ b/Lib/test/test_asyncio/test_runners.py
@@ -44,6 +44,9 @@ class BaseTest(unittest.TestCase):
     def new_loop(self):
         loop = asyncio.BaseEventLoop()
         loop._process_events = mock.Mock()
+        # Mock waking event loop from select
+        loop._write_to_self = mock.Mock()
+        loop._write_to_self.return_value = None
         loop._selector = mock.Mock()
         loop._selector.select.return_value = ()
         loop.shutdown_ag_run = False