diff --git a/manage.py b/manage.py
index a17630ac8b..31284beab9 100755
--- a/manage.py
+++ b/manage.py
@@ -85,7 +85,7 @@ class FilteredManagementUtility(ManagementUtility):
                 "",
                 "Available subcommands:",
             ]
-            commands_dict = defaultdict(lambda: [])
+            commands_dict = defaultdict(list)
             for name, app in get_filtered_commands().items():
                 if app == "django.core":
                     app = "django"
diff --git a/zerver/lib/request.py b/zerver/lib/request.py
index 6e4986f347..aeb6392975 100644
--- a/zerver/lib/request.py
+++ b/zerver/lib/request.py
@@ -63,7 +63,7 @@ class RequestNotes(BaseNotes[HttpRequest, "RequestNotes"]):
     realm: Optional[Realm] = None
     has_fetched_realm: bool = False
     set_language: Optional[str] = None
-    ratelimits_applied: List[rate_limiter.RateLimitResult] = field(default_factory=lambda: [])
+    ratelimits_applied: List[rate_limiter.RateLimitResult] = field(default_factory=list)
     query: Optional[str] = None
     error_format: Optional[str] = None
     placeholder_open_graph_description: Optional[str] = None