Update Lib/test/test_descr.py

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: Aniketsy

Lib/test/test_descr.py

@@ -1833,7 +1833,7 @@ def test_refleaks_in_staticmethod___init__(self):
 
     def test_staticmethod_new(self):
         sm = staticmethod.__new__(staticmethod, None)
-        self.assertIsInstance(repr(sm), str)
+        self.assertEqual(repr(sm), '<staticmethod(None)>')
 
     def test_classmethod_new_none_repr(self):
         cm = classmethod.__new__(classmethod, None)