diff --git a/Lib/_collections_abc.py b/Lib/_collections_abc.py
--- a/Lib/_collections_abc.py
+++ b/Lib/_collections_abc.py
@@ -6,7 +6,7 @@
 Unit tests are in test_collections.
 """
 
-from abc import ABCMeta, abstractmethod
+from abc import ABC, abstractmethod
 import sys
 
 __all__ = ["Hashable", "Iterable", "Iterator",
@@ -54,7 +54,7 @@
 
 ### ONE-TRICK PONIES ###
 
-class Hashable(metaclass=ABCMeta):
+class Hashable(ABC):
 
     __slots__ = ()
 
@@ -73,7 +73,7 @@
         return NotImplemented
 
 
-class Iterable(metaclass=ABCMeta):
+class Iterable(ABC):
 
     __slots__ = ()
 
@@ -124,7 +124,7 @@
 Iterator.register(tuple_iterator)
 Iterator.register(zip_iterator)
 
-class Sized(metaclass=ABCMeta):
+class Sized(ABC):
 
     __slots__ = ()
 
@@ -140,7 +140,7 @@
         return NotImplemented
 
 
-class Container(metaclass=ABCMeta):
+class Container(ABC):
 
     __slots__ = ()
 
@@ -156,7 +156,7 @@
         return NotImplemented
 
 
-class Callable(metaclass=ABCMeta):
+class Callable(ABC):
 
     __slots__ = ()
 
diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -6,6 +6,7 @@
 from test import support
 import unittest
 from weakref import proxy
+import abc
 
 import functools
 
@@ -1038,12 +1039,12 @@
         for haystack in permutations(bases):
             m = mro(dict, haystack)
             self.assertEqual(m, [dict, c.MutableMapping, c.Mapping, c.Sized,
-                                 c.Iterable, c.Container, object])
+                                 c.Iterable, c.Container, abc.ABC, object])
         bases = [c.Container, c.Mapping, c.MutableMapping, c.OrderedDict]
         for haystack in permutations(bases):
             m = mro(c.ChainMap, haystack)
             self.assertEqual(m, [c.ChainMap, c.MutableMapping, c.Mapping,
-                                 c.Sized, c.Iterable, c.Container, object])
+                                 c.Sized, c.Iterable, c.Container, abc.ABC, object])
 
         # If there's a generic function with implementations registered for
         # both Sized and Container, passing a defaultdict to it results in an
@@ -1053,7 +1054,7 @@
         for haystack in permutations(bases):
             m = mro(c.defaultdict, [c.Sized, c.Container, str])
             self.assertEqual(m, [c.defaultdict, dict, c.Sized, c.Container,
-                                 object])
+                                 abc.ABC, object])
 
         # MutableSequence below is registered directly on D. In other words, it
         # preceeds MutableMapping which means single dispatch will always
@@ -1067,7 +1068,7 @@
             self.assertEqual(m, [D, c.MutableSequence, c.Sequence,
                                  c.defaultdict, dict, c.MutableMapping,
                                  c.Mapping, c.Sized, c.Iterable, c.Container,
-                                 object])
+                                 abc.ABC, object])
 
         # Container and Callable are registered on different base classes and
         # a generic function supporting both should always pick the Callable
@@ -1079,7 +1080,7 @@
         for haystack in permutations(bases):
             m = mro(C, haystack)
             self.assertEqual(m, [C, c.Callable, c.defaultdict, dict, c.Mapping,
-                                 c.Sized, c.Iterable, c.Container, object])
+                                 c.Sized, c.Iterable, c.Container, abc.ABC, object])
 
     def test_register_abc(self):
         c = collections
@@ -1191,7 +1192,7 @@
         class X(D, C, B):
             def __call__(self):
                 pass   # implies Callable
-        expected = [X, c.Callable, D, C, c.Container, B, c.Sized, A, object]
+        expected = [X, c.Callable, D, C, c.Container, B, c.Sized, abc.ABC, A, object]
         for abcs in permutations([c.Sized, c.Callable, c.Container]):
             self.assertEqual(mro(X, abcs=abcs), expected)
         # unrelated ABCs don't appear in the resulting MRO