diff --git a/IPython/lib/pretty.py b/IPython/lib/pretty.py
index 44df8e4..4d3f49f 100644
--- a/IPython/lib/pretty.py
+++ b/IPython/lib/pretty.py
@@ -406,7 +406,16 @@ class RepresentationPrinter(PrettyPrinter):
                             meth = cls._repr_pretty_
                             if callable(meth):
                                 return meth(obj, self, cycle)
-                        if cls is not object and callable(getattr(cls, '__repr__', None)):
+                        if (
+                            cls is not object
+                            # check if cls defines __repr__
+                            and "__repr__" in cls.__dict__
+                            # check if __repr__ is callable.
+                            # Note: we need to test getattr(cls, '__repr__')
+                            #   instead of cls.__dict__['__repr__']
+                            #   in order to work with descriptors like partialmethod,
+                            and callable(getattr(cls, '__repr__', None))
+                        ):
                             return _repr_pprint(obj, self, cycle)
 
             return _default_pprint(obj, self, cycle)