https://github.com/python/cpython/commit/d582b6f1ab9e521b1d70e71b1f11a2f9eccde7a8
commit: d582b6f1ab9e521b1d70e71b1f11a2f9eccde7a8
branch: 3.14
author: Miss Islington (bot) <[email protected]>
committer: gaogaotiantian <[email protected]>
date: 2025-11-15T01:25:19Z
summary:

[3.14] gh-136442: Fix unittest to return exit code 5 when setUpClass raises an 
exception (GH-136487) (#141576)

gh-136442: Fix unittest to return exit code 5 when setUpClass raises an 
exception (GH-136487)
(cherry picked from commit 53d65c840e038ce9a5782fbd3da963c7aba90570)

Co-authored-by: Takuya UESHIN <[email protected]>

files:
A Misc/NEWS.d/next/Tests/2025-07-09-21-45-51.gh-issue-136442.jlbklP.rst
M Lib/test/test_unittest/test_program.py
M Lib/unittest/main.py

diff --git a/Lib/test/test_unittest/test_program.py 
b/Lib/test/test_unittest/test_program.py
index 6092ed292d8f60..8ed92373e5e984 100644
--- a/Lib/test/test_unittest/test_program.py
+++ b/Lib/test/test_unittest/test_program.py
@@ -75,6 +75,14 @@ def testUnexpectedSuccess(self):
     class Empty(unittest.TestCase):
         pass
 
+    class SetUpClassFailure(unittest.TestCase):
+        @classmethod
+        def setUpClass(cls):
+            super().setUpClass()
+            raise Exception
+        def testPass(self):
+            pass
+
     class TestLoader(unittest.TestLoader):
         """Test loader that returns a suite containing the supplied 
testcase."""
 
@@ -191,6 +199,18 @@ def test_ExitEmptySuite(self):
         out = stream.getvalue()
         self.assertIn('\nNO TESTS RAN\n', out)
 
+    def test_ExitSetUpClassFailureSuite(self):
+        stream = BufferedWriter()
+        with self.assertRaises(SystemExit) as cm:
+            unittest.main(
+                argv=["setup_class_failure"],
+                testRunner=unittest.TextTestRunner(stream=stream),
+                testLoader=self.TestLoader(self.SetUpClassFailure))
+        self.assertEqual(cm.exception.code, 1)
+        out = stream.getvalue()
+        self.assertIn("ERROR: setUpClass", out)
+        self.assertIn("SetUpClassFailure", out)
+
 
 class InitialisableProgram(unittest.TestProgram):
     exit = False
diff --git a/Lib/unittest/main.py b/Lib/unittest/main.py
index 6fd949581f3146..be99d93c78cca6 100644
--- a/Lib/unittest/main.py
+++ b/Lib/unittest/main.py
@@ -269,12 +269,12 @@ def runTests(self):
             testRunner = self.testRunner
         self.result = testRunner.run(self.test)
         if self.exit:
-            if self.result.testsRun == 0 and len(self.result.skipped) == 0:
+            if not self.result.wasSuccessful():
+                sys.exit(1)
+            elif self.result.testsRun == 0 and len(self.result.skipped) == 0:
                 sys.exit(_NO_TESTS_EXITCODE)
-            elif self.result.wasSuccessful():
-                sys.exit(0)
             else:
-                sys.exit(1)
+                sys.exit(0)
 
 
 main = TestProgram
diff --git 
a/Misc/NEWS.d/next/Tests/2025-07-09-21-45-51.gh-issue-136442.jlbklP.rst 
b/Misc/NEWS.d/next/Tests/2025-07-09-21-45-51.gh-issue-136442.jlbklP.rst
new file mode 100644
index 00000000000000..f87fb1113cad12
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2025-07-09-21-45-51.gh-issue-136442.jlbklP.rst
@@ -0,0 +1 @@
+Use exitcode ``1`` instead of ``5`` if :func:`unittest.TestCase.setUpClass` 
raises an exception

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