From de69a816fd5a7ebc14d6590e42b4f32fdec3615e Mon Sep 17 00:00:00 2001
From: Irit Katriel <iritkatriel@yahoo.com>
Date: Thu, 6 Apr 2023 11:19:45 +0100
Subject: [PATCH] gh-48330: assert warning is emitted on unittest.TestResult
 with no addDuration

---
 Lib/test/test_unittest/test_case.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_unittest/test_case.py b/Lib/test/test_unittest/test_case.py
index 05d60a8ad3cf94..dd5ff6d553e61d 100644
--- a/Lib/test/test_unittest/test_case.py
+++ b/Lib/test/test_unittest/test_case.py
@@ -304,7 +304,8 @@ def defaultTestResult(self):
             def test(self):
                 pass
 
-        Foo('test').run()
+        with self.assertWarns(RuntimeWarning):
+            Foo('test').run()
 
     def test_deprecation_of_return_val_from_test(self):
         # Issue 41322 - deprecate return of value that is not None from a test