diff --git a/crates/matrix-sdk/src/room/timeline/inner.rs b/crates/matrix-sdk/src/room/timeline/inner.rs
index 02a069d00..2257d3b8a 100644
--- a/crates/matrix-sdk/src/room/timeline/inner.rs
+++ b/crates/matrix-sdk/src/room/timeline/inner.rs
@@ -29,12 +29,13 @@ use super::{
     },
     find_event_by_txn_id, TimelineItem, TimelineKey,
 };
-use crate::events::SyncTimelineEventWithoutContent;
+use crate::{events::SyncTimelineEventWithoutContent, room};
 
-#[derive(Debug, Default)]
-pub(super) struct TimelineInner {
+#[derive(Debug)]
+pub(super) struct TimelineInner<P: ProfileProvider = room::Common> {
     items: MutableVec<Arc<TimelineItem>>,
     metadata: Mutex<TimelineInnerMetadata>,
+    profile_provider: P,
 }
 
 /// Non-signalling parts of `TimelineInner`.
@@ -46,7 +47,11 @@ pub(super) struct TimelineInnerMetadata {
     pub(super) fully_read_event_in_timeline: bool,
 }
 
-impl TimelineInner {
+impl<P: ProfileProvider> TimelineInner<P> {
+    pub(super) fn new(profile_provider: P) -> Self {
+        Self { items: Default::default(), metadata: Default::default(), profile_provider }
+    }
+
     pub(super) fn items(&self) -> MutableVecLockRef<'_, Arc<TimelineItem>> {
         self.items.lock_ref()
     }
@@ -55,11 +60,7 @@ impl TimelineInner {
         self.items.signal_vec_cloned()
     }
 
-    pub(super) fn add_initial_events(
-        &mut self,
-        events: Vec<SyncTimelineEvent>,
-        own_user_id: &UserId,
-    ) {
+    pub(super) fn add_initial_events(&mut self, events: Vec<SyncTimelineEvent>) {
         if events.is_empty() {
             return;
         }
@@ -72,11 +73,11 @@ impl TimelineInner {
         for event in events {
             handle_remote_event(
                 event.event,
-                own_user_id,
                 event.encryption_info,
                 TimelineItemPosition::End,
                 timeline_items,
                 timeline_meta,
+                &self.profile_provider,
             );
         }
     }
@@ -85,16 +86,15 @@ impl TimelineInner {
         &self,
         raw: Raw<AnySyncTimelineEvent>,
         encryption_info: Option<EncryptionInfo>,
-        own_user_id: &UserId,
     ) {
         let mut timeline_meta = self.metadata.lock().await;
         handle_remote_event(
             raw,
-            own_user_id,
             encryption_info,
             TimelineItemPosition::End,
             &mut self.items.lock_mut(),
             &mut timeline_meta,
+            &self.profile_provider,
         );
     }
 
@@ -102,10 +102,9 @@ impl TimelineInner {
         &self,
         txn_id: OwnedTransactionId,
         content: AnyMessageLikeEventContent,
-        own_user_id: &UserId,
     ) {
         let event_meta = TimelineEventMetadata {
-            sender: own_user_id.to_owned(),
+            sender: self.profile_provider.own_user_id().to_owned(),
             is_own_event: true,
             relations: Default::default(),
             // FIXME: Should we supply something here for encrypted rooms?
@@ -127,16 +126,15 @@ impl TimelineInner {
     pub(super) async fn handle_back_paginated_event(
         &self,
         event: TimelineEvent,
-        own_user_id: &UserId,
     ) -> HandleEventResult {
         let mut metadata_lock = self.metadata.lock().await;
         handle_remote_event(
             event.event.cast(),
-            own_user_id,
             event.encryption_info,
             TimelineItemPosition::Start,
             &mut self.items.lock_mut(),
             &mut metadata_lock,
+            &self.profile_provider,
         )
     }
 
@@ -210,13 +208,12 @@ impl TimelineInner {
     }
 
     #[cfg(feature = "e2e-encryption")]
-    #[instrument(skip(self, olm_machine, own_user_id))]
+    #[instrument(skip(self, olm_machine))]
     pub(super) async fn retry_event_decryption(
         &self,
         room_id: &RoomId,
         olm_machine: &OlmMachine,
         session_ids: BTreeSet<&str>,
-        own_user_id: &UserId,
     ) {
         use super::EncryptedMessage;
 
@@ -284,26 +281,42 @@ impl TimelineInner {
             let mut items_lock = self.items.lock_mut();
             handle_remote_event(
                 event.event.cast(),
-                own_user_id,
                 event.encryption_info,
                 TimelineItemPosition::Update(*idx),
                 &mut items_lock,
                 &mut metadata_lock,
+                &self.profile_provider,
             );
         }
     }
 }
 
+impl TimelineInner {
+    pub(super) fn room(&self) -> &room::Common {
+        &self.profile_provider
+    }
+}
+
+pub(super) trait ProfileProvider {
+    fn own_user_id(&self) -> &UserId;
+}
+
+impl ProfileProvider for room::Common {
+    fn own_user_id(&self) -> &UserId {
+        (**self).own_user_id()
+    }
+}
+
 /// Handle a remote event.
 ///
 /// Returns the number of timeline updates that were made.
-fn handle_remote_event(
+fn handle_remote_event<P: ProfileProvider>(
     raw: Raw<AnySyncTimelineEvent>,
-    own_user_id: &UserId,
     encryption_info: Option<EncryptionInfo>,
     position: TimelineItemPosition,
     timeline_items: &mut MutableVecLockMut<'_, Arc<TimelineItem>>,
     timeline_meta: &mut TimelineInnerMetadata,
+    profile_provider: &P,
 ) -> HandleEventResult {
     let (event_id, sender, origin_server_ts, txn_id, relations, event_kind) =
         match raw.deserialize() {
@@ -331,7 +344,7 @@ fn handle_remote_event(
             },
         };
 
-    let is_own_event = sender == own_user_id;
+    let is_own_event = sender == profile_provider.own_user_id();
     let event_meta = TimelineEventMetadata { sender, is_own_event, relations, encryption_info };
     let flow = Flow::Remote { event_id, origin_server_ts, raw_event: raw, txn_id, position };
 
diff --git a/crates/matrix-sdk/src/room/timeline/mod.rs b/crates/matrix-sdk/src/room/timeline/mod.rs
index 4aa5a1d83..dd7b4edec 100644
--- a/crates/matrix-sdk/src/room/timeline/mod.rs
+++ b/crates/matrix-sdk/src/room/timeline/mod.rs
@@ -31,7 +31,7 @@ use ruma::{
 };
 use tracing::{error, instrument, warn};
 
-use super::{Joined, Room};
+use super::Joined;
 use crate::{
     event_handler::EventHandlerHandle,
     room::{self, MessagesOptions},
@@ -68,8 +68,7 @@ use self::{
 /// messages.
 #[derive(Debug)]
 pub struct Timeline {
-    inner: Arc<TimelineInner>,
-    room: room::Common,
+    inner: Arc<TimelineInner<room::Common>>,
     start_token: Mutex<Option<String>>,
     _end_token: Mutex<Option<String>>,
     event_handler_handles: Vec<EventHandlerHandle>,
@@ -78,7 +77,7 @@ pub struct Timeline {
 impl Drop for Timeline {
     fn drop(&mut self) {
         for handle in self.event_handler_handles.drain(..) {
-            self.room.client.remove_event_handler(handle);
+            self.inner.room().client().remove_event_handler(handle);
         }
     }
 }
@@ -93,17 +92,17 @@ impl Timeline {
         prev_token: Option<String>,
         events: Vec<SyncTimelineEvent>,
     ) -> Self {
-        let mut inner = TimelineInner::default();
-        inner.add_initial_events(events, room.own_user_id());
+        let mut inner = TimelineInner::new(room.to_owned());
+        inner.add_initial_events(events);
 
         let inner = Arc::new(inner);
 
         let timeline_event_handle = room.add_event_handler({
             let inner = inner.clone();
-            move |event, encryption_info: Option<EncryptionInfo>, room: Room| {
+            move |event, encryption_info: Option<EncryptionInfo>| {
                 let inner = inner.clone();
                 async move {
-                    inner.handle_live_event(event, encryption_info, room.own_user_id()).await;
+                    inner.handle_live_event(event, encryption_info).await;
                 }
             }
         });
@@ -129,16 +128,19 @@ impl Timeline {
 
         Timeline {
             inner,
-            room: room.clone(),
             start_token: Mutex::new(prev_token),
             _end_token: Mutex::new(None),
             event_handler_handles,
         }
     }
 
+    fn room(&self) -> &room::Common {
+        self.inner.room()
+    }
+
     /// Enable tracking of the fully-read marker on this `Timeline`.
     pub async fn with_fully_read_tracking(mut self) -> Self {
-        match self.room.account_data_static::<FullyReadEventContent>().await {
+        match self.room().account_data_static::<FullyReadEventContent>().await {
             Ok(Some(fully_read)) => match fully_read.deserialize() {
                 Ok(fully_read) => {
                     self.inner.set_fully_read_event(fully_read.content.event_id).await
@@ -154,7 +156,7 @@ impl Timeline {
         }
 
         let inner = self.inner.clone();
-        let fully_read_handle = self.room.add_event_handler(move |event| {
+        let fully_read_handle = self.room().add_event_handler(move |event| {
             let inner = inner.clone();
             async move {
                 inner.handle_fully_read(event).await;
@@ -174,7 +176,7 @@ impl Timeline {
     ///   fewer events, for example because the supplied number is too big or
     ///   the beginning of the visible timeline was reached.
     /// * `
-    #[instrument(skip_all, fields(initial_pagination_size, room_id = ?self.room.room_id()))]
+    #[instrument(skip_all, fields(initial_pagination_size, room_id = ?self.room().room_id()))]
     pub async fn paginate_backwards(&self, mut opts: PaginationOptions<'_>) -> Result<()> {
         let mut start_lock = self.start_token.lock().await;
         if start_lock.is_none()
@@ -186,13 +188,12 @@ impl Timeline {
 
         self.inner.add_loading_indicator();
 
-        let own_user_id = self.room.own_user_id();
         let mut from = start_lock.clone();
         let mut outcome = PaginationOutcome::new();
 
         while let Some(limit) = opts.next_event_limit(outcome) {
             let messages = self
-                .room
+                .room()
                 .messages(assign!(MessagesOptions::backward(), {
                     from,
                     limit: limit.into(),
@@ -207,7 +208,7 @@ impl Timeline {
                 outcome.items_updated = 0;
 
                 for room_ev in messages.chunk {
-                    let res = self.inner.handle_back_paginated_event(room_ev, own_user_id).await;
+                    let res = self.inner.handle_back_paginated_event(room_ev).await;
                     outcome.items_added = outcome.items_added.checked_add(res.item_added as u16)?;
                     outcome.items_updated = outcome.items_updated.checked_add(res.items_updated)?;
                 }
@@ -272,10 +273,9 @@ impl Timeline {
     ) {
         self.inner
             .retry_event_decryption(
-                self.room.room_id(),
-                self.room.client.olm_machine().expect("Olm machine wasn't started"),
+                self.room().room_id(),
+                self.room().client.olm_machine().expect("Olm machine wasn't started"),
                 session_ids.into_iter().map(AsRef::as_ref).collect(),
-                self.room.own_user_id(),
             )
             .await;
     }
@@ -329,20 +329,18 @@ impl Timeline {
     ///
     /// [`MessageLikeUnsigned`]: ruma::events::MessageLikeUnsigned
     /// [`SyncMessageLikeEvent`]: ruma::events::SyncMessageLikeEvent
-    #[instrument(skip(self, content), fields(room_id = ?self.room.room_id()))]
+    #[instrument(skip(self, content), fields(room_id = ?self.room().room_id()))]
     pub async fn send(
         &self,
         content: AnyMessageLikeEventContent,
         txn_id: Option<&TransactionId>,
     ) -> Result<()> {
         let txn_id = txn_id.map_or_else(TransactionId::new, ToOwned::to_owned);
-        self.inner
-            .handle_local_event(txn_id.clone(), content.clone(), self.room.own_user_id())
-            .await;
+        self.inner.handle_local_event(txn_id.clone(), content.clone()).await;
 
         // If this room isn't actually in joined state, we'll get a server error.
         // Not ideal, but works for now.
-        let room = Joined { inner: self.room.clone() };
+        let room = Joined { inner: self.room().clone() };
 
         let response = room.send(content, Some(&txn_id)).await?;
         self.inner.add_event_id(&txn_id, response.event_id);
diff --git a/crates/matrix-sdk/src/room/timeline/tests.rs b/crates/matrix-sdk/src/room/timeline/tests.rs
index e1801d158..3a3af2f6f 100644
--- a/crates/matrix-sdk/src/room/timeline/tests.rs
+++ b/crates/matrix-sdk/src/room/timeline/tests.rs
@@ -47,8 +47,8 @@ use ruma::{
 use serde_json::{json, Value as JsonValue};
 
 use super::{
-    EncryptedMessage, TimelineInner, TimelineItem, TimelineItemContent, TimelineKey,
-    VirtualTimelineItem,
+    inner::ProfileProvider, EncryptedMessage, TimelineInner, TimelineItem, TimelineItemContent,
+    TimelineKey, VirtualTimelineItem,
 };
 
 static ALICE: Lazy<&UserId> = Lazy::new(|| user_id!("@alice:server.name"));
@@ -229,7 +229,6 @@ async fn unable_to_decrypt() {
             room_id!("!DovneieKSTkdHKpIXy:morpheus.localhost"),
             &olm_machine,
             iter::once(SESSION_ID).collect(),
-            own_user_id,
         )
         .await;
 
@@ -540,7 +539,7 @@ async fn initial_events() {
 }
 
 struct TestTimeline {
-    inner: TimelineInner,
+    inner: TimelineInner<TestProfileProvider>,
 }
 
 impl TestTimeline {
@@ -551,7 +550,7 @@ impl TestTimeline {
     fn with_initial_events<'a>(
         events: impl IntoIterator<Item = (&'a UserId, AnyMessageLikeEventContent)>,
     ) -> Self {
-        let mut inner = TimelineInner::default();
+        let mut inner = TimelineInner::new(TestProfileProvider);
         inner.add_initial_events(
             events
                 .into_iter()
@@ -561,7 +560,6 @@ impl TestTimeline {
                     SyncTimelineEvent { event, encryption_info: None }
                 })
                 .collect(),
-            &ALICE,
         );
 
         Self { inner }
@@ -577,12 +575,12 @@ impl TestTimeline {
     {
         let ev = make_message_event(sender, content);
         let raw = Raw::new(&ev).unwrap().cast();
-        self.inner.handle_live_event(raw, None, &ALICE).await;
+        self.inner.handle_live_event(raw, None).await;
     }
 
     async fn handle_live_custom_event(&self, event: JsonValue) {
         let raw = Raw::new(&event).unwrap().cast();
-        self.inner.handle_live_event(raw, None, &ALICE).await;
+        self.inner.handle_live_event(raw, None).await;
     }
 
     async fn handle_live_redaction(&self, sender: &UserId, redacts: &EventId) {
@@ -595,16 +593,24 @@ impl TestTimeline {
             "origin_server_ts": next_server_ts(),
         });
         let raw = Raw::new(&ev).unwrap().cast();
-        self.inner.handle_live_event(raw, None, &ALICE).await;
+        self.inner.handle_live_event(raw, None).await;
     }
 
     async fn handle_local_event(&self, content: AnyMessageLikeEventContent) -> OwnedTransactionId {
         let txn_id = TransactionId::new();
-        self.inner.handle_local_event(txn_id.clone(), content, &ALICE).await;
+        self.inner.handle_local_event(txn_id.clone(), content).await;
         txn_id
     }
 }
 
+struct TestProfileProvider;
+
+impl ProfileProvider for TestProfileProvider {
+    fn own_user_id(&self) -> &UserId {
+        &ALICE
+    }
+}
+
 fn make_message_event<C: MessageLikeEventContent>(sender: &UserId, content: C) -> JsonValue {
     json!({
         "type": content.event_type(),
diff --git a/crates/matrix-sdk/src/room/timeline/to_device.rs b/crates/matrix-sdk/src/room/timeline/to_device.rs
index 32e54c133..e03a2b878 100644
--- a/crates/matrix-sdk/src/room/timeline/to_device.rs
+++ b/crates/matrix-sdk/src/room/timeline/to_device.rs
@@ -61,17 +61,7 @@ async fn retry_decryption(
         return;
     };
 
-    let Some(own_user_id) = client.user_id() else {
-        error!("The user's own ID isn't available");
-        return;
-    };
-
     inner
-        .retry_event_decryption(
-            &room_id,
-            olm_machine,
-            iter::once(session_id.as_str()).collect(),
-            own_user_id,
-        )
+        .retry_event_decryption(&room_id, olm_machine, iter::once(session_id.as_str()).collect())
         .await;
 }