--- a/hgext/fsmonitor/pywatchman/pybser.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/hgext/fsmonitor/pywatchman/pybser.py	Mon Feb 21 13:08:28 2022 -0700
@@ -93,7 +93,7 @@
     return ret
 
 
-class _bser_buffer(object):
+class _bser_buffer:
     def __init__(self, version):
         self.bser_version = version
         self.buf = ctypes.create_string_buffer(8192)
@@ -324,7 +324,7 @@
 # This is a quack-alike with the bserObjectType in bser.c
 # It provides by getattr accessors and getitem for both index
 # and name.
-class _BunserDict(object):
+class _BunserDict:
     __slots__ = ("_keys", "_values")
 
     def __init__(self, keys, values):
@@ -350,7 +350,7 @@
         return len(self._keys)
 
 
-class Bunser(object):
+class Bunser:
     def __init__(self, mutable=True, value_encoding=None, value_errors=None):
         self.mutable = mutable
         self.value_encoding = value_encoding