diff -r 0a5fe2a08e82 -r 65a23cc8e75b contrib/import-checker.py
--- a/contrib/import-checker.py	Sun Apr 15 22:28:03 2018 -0400
+++ b/contrib/import-checker.py	Sat Apr 14 16:36:15 2018 -0700
@@ -36,6 +36,8 @@
     'mercurial.pure.parsers',
     # third-party imports should be directly imported
     'mercurial.thirdparty',
+    'mercurial.thirdparty.cbor',
+    'mercurial.thirdparty.cbor.cbor2',
     'mercurial.thirdparty.zope',
     'mercurial.thirdparty.zope.interface',
 )