diff --git a/tests/test_doctests.py b/tests/test_doctests.py
index d6a5c11a..01da30a2 100644
--- a/tests/test_doctests.py
+++ b/tests/test_doctests.py
@@ -25,6 +25,7 @@ class DoctestTestCase(TestCase):
             cls._skip = True
         else:
             cls._skip = False
+        cls.flags = doctest.REPORT_CDIFF | doctest.IGNORE_EXCEPTION_DETAIL
 
     def _check_docs(self, module):
         if self._skip: