From 7e5e13d113798117d5ef25c5ffdbd0eb39420f98 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Thu, 3 Dec 2020 13:56:41 +0100
Subject: [PATCH] bpo-42553: Fix test_asyncio.test_call_later() (GH-23627)

Fix test_asyncio.test_call_later() race condition: don't measure
asyncio performance in the call_later() unit test. The test failed
randomly on the CI.
---
 Lib/test/test_asyncio/test_events.py                           | 3 ---
 .../NEWS.d/next/Tests/2020-12-03-13-32-44.bpo-42553.2TRE2N.rst | 3 +++
 2 files changed, 3 insertions(+), 3 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Tests/2020-12-03-13-32-44.bpo-42553.2TRE2N.rst

diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index 7f76011d2b9..ce615606db7 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -294,11 +294,8 @@ class EventLoopTestsMixin:
             self.loop.stop()
 
         self.loop.call_later(0.1, callback, 'hello world')
-        t0 = time.monotonic()
         self.loop.run_forever()
-        t1 = time.monotonic()
         self.assertEqual(results, ['hello world'])
-        self.assertTrue(0.08 <= t1-t0 <= 0.8, t1-t0)
 
     def test_call_soon(self):
         results = []
diff --git a/Misc/NEWS.d/next/Tests/2020-12-03-13-32-44.bpo-42553.2TRE2N.rst b/Misc/NEWS.d/next/Tests/2020-12-03-13-32-44.bpo-42553.2TRE2N.rst
new file mode 100644
index 00000000000..87221428472
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2020-12-03-13-32-44.bpo-42553.2TRE2N.rst
@@ -0,0 +1,3 @@
+Fix ``test_asyncio.test_call_later()`` race condition: don't measure asyncio
+performance in the ``call_later()`` unit test. The test failed randomly on
+the CI.