diff --git a/numpydoc/tests/test_numpydoc.py b/numpydoc/tests/test_numpydoc.py
index f46e2565..997cb0a5 100644
--- a/numpydoc/tests/test_numpydoc.py
+++ b/numpydoc/tests/test_numpydoc.py
@@ -49,6 +49,7 @@ def __init__(self):
         self.verbosity = 2
         self._warncount = 0
         self.warningiserror = False
+        self._exception_on_warning = False
 
 
 def test_mangle_docstrings_basic():