diff --git a/matrix_sdk/src/request_builder.rs b/matrix_sdk/src/request_builder.rs
index 82d4b2ee..d397d78f 100644
--- a/matrix_sdk/src/request_builder.rs
+++ b/matrix_sdk/src/request_builder.rs
@@ -152,6 +152,12 @@ impl RoomBuilder {
     }
 }
 
+impl Default for RoomBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Into<create_room::Request> for RoomBuilder {
     fn into(mut self) -> create_room::Request {
         self.req.creation_content = Some(self.creation_content);
diff --git a/matrix_sdk_base/src/models/room.rs b/matrix_sdk_base/src/models/room.rs
index c0c97cd7..ae1d9c88 100644
--- a/matrix_sdk_base/src/models/room.rs
+++ b/matrix_sdk_base/src/models/room.rs
@@ -374,12 +374,12 @@ impl Room {
                 self.invited_members.remove(target_member);
 
                 self.joined_members
-                    .insert(target_member.clone(), new_member.clone())
+                    .insert(target_member.clone(), new_member)
             }
 
             MembershipState::Invite => self
                 .invited_members
-                .insert(target_member.clone(), new_member.clone()),
+                .insert(target_member.clone(), new_member),
 
             _ => panic!("Room::add_member called on event that is neither `join` nor `invite`."),
         };
@@ -416,7 +416,7 @@ impl Room {
 
         // Perform display name disambiguations, if necessary.
         let disambiguations =
-            self.disambiguation_updates(target_member, leaving_member.display_name.clone(), None);
+            self.disambiguation_updates(target_member, leaving_member.display_name, None);
 
         debug!("remove_member: disambiguations: {:#?}", disambiguations);
 
@@ -970,7 +970,7 @@ impl Room {
         }
 
         let disambiguations =
-            self.disambiguation_updates(target_member, old_name.clone(), new_name.clone());
+            self.disambiguation_updates(target_member, old_name, new_name.clone());
         for (id, is_ambiguous) in disambiguations.iter() {
             if self.get_member_mut(id).is_none() {
                 debug!("update_member_profile [{}]: Tried disambiguating display name for {} but he's not there",
diff --git a/matrix_sdk_base/src/models/room_member.rs b/matrix_sdk_base/src/models/room_member.rs
index de0a50f9..999ac68c 100644
--- a/matrix_sdk_base/src/models/room_member.rs
+++ b/matrix_sdk_base/src/models/room_member.rs
@@ -143,9 +143,9 @@ impl RoomMember {
     /// `RoomMember::unique_name` in certain situations.
     pub fn disambiguated_name(&self) -> String {
         if self.display_name_ambiguous {
-            self.unique_name().into()
+            self.unique_name()
         } else {
-            self.name().into()
+            self.name()
         }
     }
 }
diff --git a/matrix_sdk_crypto/src/machine.rs b/matrix_sdk_crypto/src/machine.rs
index f0305cfa..556a599b 100644
--- a/matrix_sdk_crypto/src/machine.rs
+++ b/matrix_sdk_crypto/src/machine.rs
@@ -98,6 +98,7 @@ impl OlmMachine {
     /// * `user_id` - The unique id of the user that owns this machine.
     ///
     /// * `device_id` - The unique id of the device that owns this machine.
+    #[allow(clippy::ptr_arg)]
     pub fn new(user_id: &UserId, device_id: &DeviceId) -> Self {
         OlmMachine {
             user_id: user_id.clone(),
diff --git a/matrix_sdk_crypto/src/olm.rs b/matrix_sdk_crypto/src/olm.rs
index e17b2e65..aece7912 100644
--- a/matrix_sdk_crypto/src/olm.rs
+++ b/matrix_sdk_crypto/src/olm.rs
@@ -87,6 +87,7 @@ impl Account {
     ];
 
     /// Create a fresh new account, this will generate the identity key-pair.
+    #[allow(clippy::ptr_arg)]
     pub fn new(user_id: &UserId, device_id: &DeviceId) -> Self {
         let account = OlmAccount::new();
         let identity_keys = account.parsed_identity_keys();
@@ -252,6 +253,7 @@ impl Account {
     ///
     /// * `shared` - Boolean determining if the account was uploaded to the
     /// server.
+    #[allow(clippy::ptr_arg)]
     pub fn from_pickle(
         pickle: String,
         pickle_mode: PicklingMode,
@@ -426,14 +428,12 @@ impl Account {
         device: Device,
         key_map: &BTreeMap<AlgorithmAndDeviceId, OneTimeKey>,
     ) -> Result<Session, SessionCreationError> {
-        let one_time_key =
-            key_map
-                .values()
-                .next()
-                .ok_or(SessionCreationError::OneTimeKeyMissing(
-                    device.user_id().to_owned(),
-                    device.device_id().to_owned(),
-                ))?;
+        let one_time_key = key_map.values().next().ok_or_else(|| {
+            SessionCreationError::OneTimeKeyMissing(
+                device.user_id().to_owned(),
+                device.device_id().to_owned(),
+            )
+        })?;
 
         let one_time_key = match one_time_key {
             OneTimeKey::SignedKey(k) => k,
@@ -453,12 +453,12 @@ impl Account {
             )
         })?;
 
-        let curve_key = device.get_key(KeyAlgorithm::Curve25519).ok_or(
+        let curve_key = device.get_key(KeyAlgorithm::Curve25519).ok_or_else(|| {
             SessionCreationError::DeviceMissingCurveKey(
                 device.user_id().to_owned(),
                 device.device_id().to_owned(),
-            ),
-        )?;
+            )
+        })?;
 
         self.create_outbound_session_helper(curve_key, &one_time_key)
             .await
diff --git a/matrix_sdk_crypto/src/store/mod.rs b/matrix_sdk_crypto/src/store/mod.rs
index 7a690ce2..2e40503e 100644
--- a/matrix_sdk_crypto/src/store/mod.rs
+++ b/matrix_sdk_crypto/src/store/mod.rs
@@ -87,7 +87,7 @@ pub enum CryptoStoreError {
 pub type Result<T> = std::result::Result<T, CryptoStoreError>;
 
 #[async_trait]
-#[warn(clippy::type_complexity)]
+#[allow(clippy::type_complexity)]
 #[cfg_attr(not(target_arch = "wasm32"), send_sync)]
 /// Trait abstracting a store that the `OlmMachine` uses to store cryptographic
 /// keys.