3 files changed, 3 insertions, 3 deletions
diff --git a/synapse/storage/databases/main/end_to_end_keys.py b/synapse/storage/databases/main/end_to_end_keys.py
index fba3098ea2..c8df0bcb3f 100644
--- a/synapse/storage/databases/main/end_to_end_keys.py
+++ b/synapse/storage/databases/main/end_to_end_keys.py
@@ -35,7 +35,7 @@ if TYPE_CHECKING:
from synapse.handlers.e2e_keys import SignatureListItem
-@attr.s
+@attr.s(slots=True)
class DeviceKeyLookupResult:
"""The type returned by get_e2e_device_keys_and_signatures"""
diff --git a/synapse/storage/databases/main/event_push_actions.py b/synapse/storage/databases/main/event_push_actions.py
index 5233ed83e2..7805fb814e 100644
--- a/synapse/storage/databases/main/event_push_actions.py
+++ b/synapse/storage/databases/main/event_push_actions.py
@@ -969,7 +969,7 @@ def _action_has_highlight(actions):
return False
-@attr.s
+@attr.s(slots=True)
class _EventPushSummary:
"""Summary of pending event push actions for a given user in a given room.
Used in _rotate_notifs_before_txn to manipulate results from event_push_actions.
diff --git a/synapse/storage/databases/main/ui_auth.py b/synapse/storage/databases/main/ui_auth.py
index b89668d561..3b9211a6d2 100644
--- a/synapse/storage/databases/main/ui_auth.py
+++ b/synapse/storage/databases/main/ui_auth.py
@@ -23,7 +23,7 @@ from synapse.types import JsonDict
from synapse.util import json_encoder, stringutils
-@attr.s
+@attr.s(slots=True)
class UIAuthSessionData:
session_id = attr.ib(type=str)
# The dictionary from the client root level, not the 'auth' key.
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