diff --git a/Lib/test/test_richcmp.py b/Lib/test/test_richcmp.py
index 687298d26e5..f412a89055c 100644
--- a/Lib/test/test_richcmp.py
+++ b/Lib/test/test_richcmp.py
@@ -211,7 +211,7 @@ def test_not(self):
         # Check that exceptions in __nonzero__ are properly
         # propagated by the not operator
         import operator
-        class Exc:
+        class Exc(Exception):
             pass
         class Bad:
             def __nonzero__(self):
@@ -305,7 +305,7 @@ def test_coverage(self):
     def test_badentry(self):
         # make sure that exceptions for item comparison are properly
         # propagated in list comparisons
-        class Exc:
+        class Exc(Exception):
             pass
         class Bad:
             def __eq__(self, other):