diff --git a/src/admin/query/resolver.rs b/src/admin/query/resolver.rs
index 5880d449f..d651e5bff 100644
--- a/src/admin/query/resolver.rs
+++ b/src/admin/query/resolver.rs
@@ -50,7 +50,7 @@ async fn destinations_cache(&self, server_name: Option<OwnedServerName>) -> Resu
 
 	while let Some((name, CachedDest { dest, host, expire })) = destinations.next().await {
 		if let Some(server_name) = server_name.as_ref() {
-			if name != server_name {
+			if name != *server_name {
 				continue;
 			}
 		}
@@ -76,7 +76,7 @@ async fn overrides_cache(&self, server_name: Option<String>) -> Result {
 		overrides.next().await
 	{
 		if let Some(server_name) = server_name.as_ref() {
-			if name != server_name {
+			if name != *server_name {
 				continue;
 			}
 		}
diff --git a/src/admin/query/room_alias.rs b/src/admin/query/room_alias.rs
index 0dc1833ae..5187e5fe4 100644
--- a/src/admin/query/room_alias.rs
+++ b/src/admin/query/room_alias.rs
@@ -41,7 +41,6 @@ pub(super) async fn process(subcommand: RoomAliasCommand, context: &Context<'_>)
 				.rooms
 				.alias
 				.local_aliases_for_room(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
diff --git a/src/admin/query/room_state_cache.rs b/src/admin/query/room_state_cache.rs
index 798792d7f..b66ac5103 100644
--- a/src/admin/query/room_state_cache.rs
+++ b/src/admin/query/room_state_cache.rs
@@ -101,7 +101,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.room_servers(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -118,7 +117,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.server_rooms(&server)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -135,7 +133,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.room_members(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -152,7 +149,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.local_users_in_room(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -169,7 +165,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.active_local_users_in_room(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -212,7 +207,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.room_useroncejoined(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -229,7 +223,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.room_members_invited(&room_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
@@ -276,7 +269,6 @@ pub(super) async fn process(subcommand: RoomStateCacheCommand, context: &Context
 				.rooms
 				.state_cache
 				.rooms_joined(&user_id)
-				.map(ToOwned::to_owned)
 				.collect()
 				.await;
 			let query_time = timer.elapsed();
diff --git a/src/admin/query/users.rs b/src/admin/query/users.rs
index 2b5b3481f..497a4f528 100644
--- a/src/admin/query/users.rs
+++ b/src/admin/query/users.rs
@@ -104,7 +104,6 @@ async fn get_shared_rooms(&self, user_a: OwnedUserId, user_b: OwnedUserId) -> Re
 		.rooms
 		.state_cache
 		.get_shared_rooms(&user_a, &user_b)
-		.map(ToOwned::to_owned)
 		.collect()
 		.await;
 	let query_time = timer.elapsed();
@@ -217,8 +216,7 @@ async fn iter_users2(&self) -> Result {
 	let result: Vec<_> = self.services.users.stream().collect().await;
 	let result: Vec<_> = result
 		.into_iter()
-		.map(ruma::UserId::as_bytes)
-		.map(String::from_utf8_lossy)
+		.map(|user_id| String::from_utf8_lossy(user_id.as_bytes()).into_owned())
 		.collect();
 
 	let query_time = timer.elapsed();
@@ -254,7 +252,6 @@ async fn list_devices(&self, user_id: OwnedUserId) -> Result {
 		.services
 		.users
 		.all_device_ids(&user_id)
-		.map(ToOwned::to_owned)
 		.collect::<Vec<_>>()
 		.await;