1 files changed, 5 insertions, 1 deletions
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index de0b9f0..5dfc9d4 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -697,7 +697,7 @@ def dash_R_cleanup(fs, ps, pic):
     import gc, copy_reg
     import _strptime, linecache, dircache
     import urlparse, urllib, urllib2, mimetypes, doctest
-    import struct, filecmp
+    import struct, filecmp, collections
     from distutils.dir_util import _path_created
 
     # Restore some original values.
@@ -707,6 +707,10 @@ def dash_R_cleanup(fs, ps, pic):
     sys.path_importer_cache.clear()
     sys.path_importer_cache.update(pic)
 
+    # Clear ABC registries.
+    for obj in [collections.Hashable, collections.Iterable]:
+        obj._ABCMeta__registry.clear()
+
     # Clear assorted module caches.
     _path_created.clear()
     re.purge()