diff -r 55d132525155 -r 642e31cb55f0 hgext/remotefilelog/basepack.py
--- a/hgext/remotefilelog/basepack.py	Mon Feb 21 13:03:43 2022 -0700
+++ b/hgext/remotefilelog/basepack.py	Mon Feb 21 13:08:28 2022 -0700
@@ -63,7 +63,7 @@
     PACKOPENMODE = b'rb'
 
 
-class _cachebackedpacks(object):
+class _cachebackedpacks:
     def __init__(self, packs, cachesize):
         self._packs = set(packs)
         self._lrucache = util.lrucachedict(cachesize)
@@ -109,7 +109,7 @@
         self._lastpack = None
 
 
-class basepackstore(object):
+class basepackstore:
     # Default cache size limit for the pack files.
     DEFAULTCACHESIZE = 100
 
@@ -267,7 +267,7 @@
         return newpacks
 
 
-class versionmixin(object):
+class versionmixin:
     # Mix-in for classes with multiple supported versions
     VERSION = None
     SUPPORTED_VERSIONS = [2]
@@ -526,7 +526,7 @@
         self.idxfp.write(struct.pack(b'!BB', self.VERSION, config))
 
 
-class indexparams(object):
+class indexparams:
     __slots__ = (
         'fanoutprefix',
         'fanoutstruct',