diff --git a/bindings/matrix-sdk-ffi/src/sliding_sync.rs b/bindings/matrix-sdk-ffi/src/sliding_sync.rs
index ded3cd4f6..cfe0a22cf 100644
--- a/bindings/matrix-sdk-ffi/src/sliding_sync.rs
+++ b/bindings/matrix-sdk-ffi/src/sliding_sync.rs
@@ -144,7 +144,7 @@ impl From<matrix_sdk::sliding_sync::Error> for SlidingSyncError {
         match value {
             E::BadResponse(message) => Self::BadResponse { message },
             E::BuildMissingField(message) => {
-                Self::BuildMissingField { message: message.to_string() }
+                Self::BuildMissingField { message: message.to_owned() }
             }
             E::RequestGeneratorHasNotBeenInitialized(message) => {
                 Self::RequestGeneratorHasNotBeenInitialized { message }
diff --git a/crates/matrix-sdk/src/sliding_sync/cache.rs b/crates/matrix-sdk/src/sliding_sync/cache.rs
index c14687a12..848d360f0 100644
--- a/crates/matrix-sdk/src/sliding_sync/cache.rs
+++ b/crates/matrix-sdk/src/sliding_sync/cache.rs
@@ -244,7 +244,7 @@ mod tests {
                 let sliding_sync = client
                     .sliding_sync()
                     .await
-                    .storage_key(Some("hello".to_string()))
+                    .storage_key(Some("hello".to_owned()))
                     .add_list(SlidingSyncList::builder().name("list_foo").build()?)
                     .build()
                     .await?;
@@ -278,7 +278,7 @@ mod tests {
                 let sliding_sync = client
                     .sliding_sync()
                     .await
-                    .storage_key(Some("hello".to_string()))
+                    .storage_key(Some("hello".to_owned()))
                     .add_list(SlidingSyncList::builder().name("list_foo").build()?)
                     .build()
                     .await?;
diff --git a/crates/matrix-sdk/src/sliding_sync/list/mod.rs b/crates/matrix-sdk/src/sliding_sync/list/mod.rs
index 66b4989fd..959e06299 100644
--- a/crates/matrix-sdk/src/sliding_sync/list/mod.rs
+++ b/crates/matrix-sdk/src/sliding_sync/list/mod.rs
@@ -538,7 +538,7 @@ fn apply_sync_operations(
                     .range
                     .ok_or_else(|| {
                         Error::BadResponse(
-                            "`range` must be present for `SYNC` operation".to_string(),
+                            "`range` must be present for `SYNC` operation".to_owned(),
                         )
                     })
                     .map(|(start, end)| {
@@ -578,7 +578,7 @@ fn apply_sync_operations(
                 // `room_ids` is absent.
                 if operation.room_ids.is_empty() {
                     return Err(Error::BadResponse(
-                        "`room_ids` must be present for `SYNC` operation".to_string(),
+                        "`room_ids` must be present for `SYNC` operation".to_owned(),
                     ));
                 }
 
@@ -627,7 +627,7 @@ fn apply_sync_operations(
                     .index
                     .ok_or_else(|| {
                         Error::BadResponse(
-                            "`index` must be present for `DELETE` operation".to_string(),
+                            "`index` must be present for `DELETE` operation".to_owned(),
                         )
                     })?
                     .try_into()
@@ -656,14 +656,14 @@ fn apply_sync_operations(
                     .index
                     .ok_or_else(|| {
                         Error::BadResponse(
-                            "`index` must be present for `INSERT` operation".to_string(),
+                            "`index` must be present for `INSERT` operation".to_owned(),
                         )
                     })?
                     .try_into()
                     .unwrap();
                 let room_id = operation.room_id.clone().ok_or_else(|| {
                     Error::BadResponse(
-                        "`room_id` must be present for `INSERT` operation".to_string(),
+                        "`room_id` must be present for `INSERT` operation".to_owned(),
                     )
                 })?;
 
@@ -692,7 +692,7 @@ fn apply_sync_operations(
                     .range
                     .ok_or_else(|| {
                         Error::BadResponse(
-                            "`range` must be present for `INVALIDATE` operation".to_string(),
+                            "`range` must be present for `INVALIDATE` operation".to_owned(),
                         )
                     })
                     .map(|(start, end)| {
@@ -877,7 +877,7 @@ mod tests {
         let list = SlidingSyncList {
             inner: Arc::new(SlidingSyncListInner {
                 sync_mode: SlidingSyncMode::Growing,
-                sort: vec!["foo".to_string(), "bar".to_string()],
+                sort: vec!["foo".to_owned(), "bar".to_owned()],
                 required_state: vec![(StateEventType::RoomName, "baz".to_owned())],
                 filters: Some(assign!(v4::SyncRequestListFilters::default(), {
                     is_dm: Some(true),