Rename class attribute containing the class to be tested, so the name is the
same as for the string and sequence tests.
diff --git a/Lib/test/test_userdict.py b/Lib/test/test_userdict.py
index f67e55b..cc5b0ed 100644
--- a/Lib/test/test_userdict.py
+++ b/Lib/test/test_userdict.py
@@ -12,7 +12,7 @@
 d5 = {"one": 1, "two": 1}
 
 class UserDictTest(mapping_tests.TestHashMappingProtocol):
-    _tested_class = UserDict.IterableUserDict
+    type2test = UserDict.IterableUserDict
 
     def test_all(self):
         # Test constructors
@@ -199,7 +199,7 @@
     fromkeys = classmethod(fromkeys)
 
 class UserDictMixinTest(mapping_tests.TestMappingProtocol):
-    _tested_class = SeqDict
+    type2test = SeqDict
 
     def test_all(self):
         ## Setup test and verify working of the test class