Python 3.11 foreward compatibilty.

The Python 2.7 variant was dropped there.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/zope/proxy/tests/test_proxy.py b/src/zope/proxy/tests/test_proxy.py
index 5d7124c..9d21d3a 100644
--- a/src/zope/proxy/tests/test_proxy.py
+++ b/src/zope/proxy/tests/test_proxy.py
@@ -43,8 +43,9 @@ class PyProxyBaseTestCase(unittest.TestCase):
 
     # Avoid DeprecationWarning for assertRaisesRegexp on Python 3 while
     # coping with Python 2 not having the Regex spelling variant
-    assertRaisesRegex = getattr(unittest.TestCase, 'assertRaisesRegex',
-                                unittest.TestCase.assertRaisesRegexp)
+    assertRaisesRegex = getattr(
+        unittest.TestCase, 'assertRaisesRegex',
+        getattr(unittest.TestCase, 'assertRaisesRegexp', None))
 
     def _getTargetClass(self):
         from zope.proxy import PyProxyBase