diff -r 49630e75635d -r 922b3fae9c7d contrib/import-checker.py
--- a/contrib/import-checker.py	Wed Mar 21 18:13:40 2018 -0700
+++ b/contrib/import-checker.py	Wed Mar 21 18:32:47 2018 -0700
@@ -37,6 +37,8 @@
     'mercurial.pure.parsers',
     # third-party imports should be directly imported
     'mercurial.thirdparty',
+    'mercurial.thirdparty.zope',
+    'mercurial.thirdparty.zope.interface',
 )
 
 # Whitelist of symbols that can be directly imported.