diff --git a/IPython/lib/tests/test_deepreload.py b/IPython/lib/tests/test_deepreload.py
index e8d8e05..57b938e 100644
--- a/IPython/lib/tests/test_deepreload.py
+++ b/IPython/lib/tests/test_deepreload.py
@@ -27,7 +27,7 @@ def test_deepreload_numpy():
         # Standard exclusions:
         'sys', 'os.path', '__builtin__', '__main__',
         # Test-related exclusions:
-        'unittest',
+        'unittest', 'UserDict',
         ]
     dreload(numpy, exclude=exclude)