bpo-39481: PEP 585 for dataclasses, mailbox, contextvars (GH-19425)
diff --git a/Lib/test/test_genericalias.py b/Lib/test/test_genericalias.py
index 686df17..37cbf92 100644
--- a/Lib/test/test_genericalias.py
+++ b/Lib/test/test_genericalias.py
@@ -9,7 +9,10 @@
from concurrent.futures import Future
from concurrent.futures.thread import _WorkItem
from contextlib import AbstractContextManager, AbstractAsyncContextManager
-from functools import partial, partialmethod, _lru_cache_wrapper, cached_property
+from contextvars import ContextVar, Token
+from dataclasses import Field
+from functools import partial, partialmethod, cached_property
+from mailbox import Mailbox, _PartialFile
from ctypes import Array, LibraryLoader
from difflib import SequenceMatcher
from filecmp import dircmp
@@ -60,6 +63,9 @@
Reversible,
Container, Collection,
Callable,
+ Mailbox, _PartialFile,
+ ContextVar, Token,
+ Field,
Set, MutableSet,
Mapping, MutableMapping, MappingView,
KeysView, ItemsView, ValuesView,