diff --git a/contrib/testparseutil.py b/contrib/testparseutil.py
--- a/contrib/testparseutil.py
+++ b/contrib/testparseutil.py
@@ -80,7 +80,7 @@
 ####################
 
 
-class embeddedmatcher(object):
+class embeddedmatcher(object):  # pytype: disable=ignored-metaclass
     """Base class to detect embedded code fragments in *.t test script
     """
 
diff --git a/hgext/infinitepush/store.py b/hgext/infinitepush/store.py
--- a/hgext/infinitepush/store.py
+++ b/hgext/infinitepush/store.py
@@ -29,7 +29,7 @@
     pass
 
 
-class abstractbundlestore(object):
+class abstractbundlestore(object):  # pytype: disable=ignored-metaclass
     """Defines the interface for bundle stores.
 
     A bundle store is an entity that stores raw bundle data. It is a simple
diff --git a/mercurial/fancyopts.py b/mercurial/fancyopts.py
--- a/mercurial/fancyopts.py
+++ b/mercurial/fancyopts.py
@@ -205,7 +205,7 @@
     return parsedopts, parsedargs
 
 
-class customopt(object):
+class customopt(object):  # pytype: disable=ignored-metaclass
     """Manage defaults and mutations for any type of opt."""
 
     __metaclass__ = abc.ABCMeta
diff --git a/mercurial/templater.py b/mercurial/templater.py
--- a/mercurial/templater.py
+++ b/mercurial/templater.py
@@ -611,7 +611,7 @@
     return s[1:-1]
 
 
-class resourcemapper(object):
+class resourcemapper(object):  # pytype: disable=ignored-metaclass
     """Mapper of internal template resources"""
 
     __metaclass__ = abc.ABCMeta
diff --git a/mercurial/templateutil.py b/mercurial/templateutil.py
--- a/mercurial/templateutil.py
+++ b/mercurial/templateutil.py
@@ -31,7 +31,7 @@
     pass
 
 
-class wrapped(object):
+class wrapped(object):  # pytype: disable=ignored-metaclass
     """Object requiring extra conversion prior to displaying or processing
     as value
 
@@ -108,7 +108,7 @@
         """
 
 
-class mappable(object):
+class mappable(object):  # pytype: disable=ignored-metaclass
     """Object which can be converted to a single template mapping"""
 
     __metaclass__ = abc.ABCMeta
diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -1304,7 +1304,7 @@
     """
 
 
-class transactional(object):
+class transactional(object):  # pytype: disable=ignored-metaclass
     """Base class for making a transactional type into a context manager."""
 
     __metaclass__ = abc.ABCMeta