diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index 62ea44fa49..bf800a3852 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -96,7 +96,7 @@ class DefaultDictProperty(DictProperty):
return instance._dict.get(self.key, self.default)
-class _EventInternalMetadata(object):
+class _EventInternalMetadata:
__slots__ = ["_dict"]
def __init__(self, internal_metadata_dict: JsonDict):
diff --git a/synapse/events/builder.py b/synapse/events/builder.py
index 7878cd7044..b6c47be646 100644
--- a/synapse/events/builder.py
+++ b/synapse/events/builder.py
@@ -36,7 +36,7 @@ from synapse.util.stringutils import random_string
@attr.s(slots=True, cmp=False, frozen=True)
-class EventBuilder(object):
+class EventBuilder:
"""A format independent event builder used to build up the event content
before signing the event.
@@ -164,7 +164,7 @@ class EventBuilder(object):
)
-class EventBuilderFactory(object):
+class EventBuilderFactory:
def __init__(self, hs):
self.clock = hs.get_clock()
self.hostname = hs.hostname
diff --git a/synapse/events/spamcheck.py b/synapse/events/spamcheck.py
index a7cddac974..b0fc859a47 100644
--- a/synapse/events/spamcheck.py
+++ b/synapse/events/spamcheck.py
@@ -25,7 +25,7 @@ if MYPY:
import synapse.server
-class SpamChecker(object):
+class SpamChecker:
def __init__(self, hs: "synapse.server.HomeServer"):
self.spam_checkers = [] # type: List[Any]
diff --git a/synapse/events/third_party_rules.py b/synapse/events/third_party_rules.py
index 2956a64234..9d5310851c 100644
--- a/synapse/events/third_party_rules.py
+++ b/synapse/events/third_party_rules.py
@@ -18,7 +18,7 @@ from synapse.events.snapshot import EventContext
from synapse.types import Requester
-class ThirdPartyEventRules(object):
+class ThirdPartyEventRules:
"""Allows server admins to provide a Python module implementing an extra
set of rules to apply when processing events.
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 2d42e268c6..32c73d3413 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -322,7 +322,7 @@ def serialize_event(
return d
-class EventClientSerializer(object):
+class EventClientSerializer:
"""Serializes events that are to be sent to clients.
This is used for bundling extra information with any events to be sent to
diff --git a/synapse/events/validator.py b/synapse/events/validator.py
index 5ce3874fba..9df35b54ba 100644
--- a/synapse/events/validator.py
+++ b/synapse/events/validator.py
@@ -20,7 +20,7 @@ from synapse.events.utils import validate_canonicaljson
from synapse.types import EventID, RoomID, UserID
-class EventValidator(object):
+class EventValidator:
def validate_new(self, event, config):
"""Validates the event has roughly the right format
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