diff --git a/tests/test_utils/test_simpletestcase.py b/tests/test_utils/test_simpletestcase.py
new file mode 100644
index 0000000000..eb1e0017d2
--- /dev/null
+++ b/tests/test_utils/test_simpletestcase.py
@@ -0,0 +1,90 @@
+import unittest
+from io import StringIO
+from unittest import mock
+from unittest.suite import _DebugResult
+
+from django.test import SimpleTestCase
+
+
+class ErrorTestCase(SimpleTestCase):
+    def raising_test(self):
+        self._pre_setup.assert_called_once_with()
+        raise Exception('debug() bubbles up exceptions before cleanup.')
+
+    def simple_test(self):
+        self._pre_setup.assert_called_once_with()
+
+    @unittest.skip('Skip condition.')
+    def skipped_test(self):
+        pass
+
+
+@mock.patch.object(ErrorTestCase, '_post_teardown')
+@mock.patch.object(ErrorTestCase, '_pre_setup')
+class DebugInvocationTests(SimpleTestCase):
+    def get_runner(self):
+        return unittest.TextTestRunner(stream=StringIO())
+
+    def test_run_cleanup(self, _pre_setup, _post_teardown):
+        """Simple test run: catches errors and runs cleanup."""
+        test_suite = unittest.TestSuite()
+        test_suite.addTest(ErrorTestCase('raising_test'))
+        result = self.get_runner()._makeResult()
+        self.assertEqual(result.errors, [])
+        test_suite.run(result)
+        self.assertEqual(len(result.errors), 1)
+        _, traceback = result.errors[0]
+        self.assertIn('Exception: debug() bubbles up exceptions before cleanup.', traceback)
+        _pre_setup.assert_called_once_with()
+        _post_teardown.assert_called_once_with()
+
+    def test_run_pre_setup_error(self, _pre_setup, _post_teardown):
+        _pre_setup.side_effect = Exception('Exception in _pre_setup.')
+        test_suite = unittest.TestSuite()
+        test_suite.addTest(ErrorTestCase('simple_test'))
+        result = self.get_runner()._makeResult()
+        self.assertEqual(result.errors, [])
+        test_suite.run(result)
+        self.assertEqual(len(result.errors), 1)
+        _, traceback = result.errors[0]
+        self.assertIn('Exception: Exception in _pre_setup.', traceback)
+        # pre-setup is called but not post-teardown.
+        _pre_setup.assert_called_once_with()
+        self.assertFalse(_post_teardown.called)
+
+    def test_run_post_teardown_error(self, _pre_setup, _post_teardown):
+        _post_teardown.side_effect = Exception('Exception in _post_teardown.')
+        test_suite = unittest.TestSuite()
+        test_suite.addTest(ErrorTestCase('simple_test'))
+        result = self.get_runner()._makeResult()
+        self.assertEqual(result.errors, [])
+        test_suite.run(result)
+        self.assertEqual(len(result.errors), 1)
+        _, traceback = result.errors[0]
+        self.assertIn('Exception: Exception in _post_teardown.', traceback)
+        # pre-setup and post-teardwn are called.
+        _pre_setup.assert_called_once_with()
+        _post_teardown.assert_called_once_with()
+
+    def test_run_skipped_test_no_cleanup(self, _pre_setup, _post_teardown):
+        test_suite = unittest.TestSuite()
+        test_suite.addTest(ErrorTestCase('skipped_test'))
+        try:
+            test_suite.run(self.get_runner()._makeResult())
+        except unittest.SkipTest:
+            self.fail('SkipTest should not be raised at this stage.')
+        self.assertFalse(_post_teardown.called)
+        self.assertFalse(_pre_setup.called)
+
+    def test_debug_skipped_test_no_cleanup(self, _pre_setup, _post_teardown):
+        test_suite = unittest.TestSuite()
+        test_suite.addTest(ErrorTestCase('skipped_test'))
+        with self.assertRaisesMessage(unittest.SkipTest, 'Skip condition.'):
+            # This is the same as test_suite.debug().
+            result = _DebugResult()
+            test_suite.run(result, debug=True)
+        self.assertFalse(_post_teardown.called)
+        self.assertFalse(_pre_setup.called)
+        # Suite teardown needs to be manually called to isolate failure.
+        test_suite._tearDownPreviousClass(None, result)
+        test_suite._handleModuleTearDown(result)