diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index cb4b431..b10c57d 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -88,8 +88,8 @@
 class metaclass(type):
     pass
 
-class use_metaclass(object):
-    __metaclass__ = metaclass
+class use_metaclass(object, metaclass=metaclass):
+    pass
 
 # DATA0 .. DATA2 are the pickles we expect under the various protocols, for
 # the object returned by create_data().