diff --git a/parity/account_utils.rs b/parity/account_utils.rs
index 972ccf9f0..4a2e3da0a 100644
--- a/parity/account_utils.rs
+++ b/parity/account_utils.rs
@@ -48,11 +48,11 @@ mod accounts {
 		Ok(None)
 	}
 
-	pub fn private_tx_signer(_account_provider: Arc<AccountProvider>, _passwords: &[Password]) -> Result<Arc<::ethcore_private_tx::Signer>, String> {
+	pub fn private_tx_signer(_account_provider: Arc<AccountProvider>, _passwords: &[Password]) -> Result<Arc<dyn (::ethcore_private_tx::Signer)>, String> {
 		Ok(Arc::new(::ethcore_private_tx::DummySigner))
 	}
 
-	pub fn accounts_list(_account_provider: Arc<AccountProvider>) -> Arc<Fn() -> Vec<Address> + Send + Sync> {
+	pub fn accounts_list(_account_provider: Arc<AccountProvider>) -> Arc<dyn Fn() -> Vec<Address> + Send + Sync> {
 		Arc::new(|| vec![])
 	}
 }
diff --git a/rpc/src/v1/helpers/errors.rs b/rpc/src/v1/helpers/errors.rs
index a6cbe0e90..ed915db8a 100644
--- a/rpc/src/v1/helpers/errors.rs
+++ b/rpc/src/v1/helpers/errors.rs
@@ -58,6 +58,7 @@ mod codes {
 	pub const REQUEST_REJECTED_LIMIT: i64 = -32041;
 	pub const REQUEST_NOT_FOUND: i64 = -32042;
 	pub const ENCRYPTION_ERROR: i64 = -32055;
+	#[cfg(any(test, feature = "accounts"))]
 	pub const ENCODING_ERROR: i64 = -32058;
 	pub const FETCH_ERROR: i64 = -32060;
 	pub const NO_LIGHT_PEERS: i64 = -32065;
diff --git a/rpc/src/v1/types/derivation.rs b/rpc/src/v1/types/derivation.rs
index a3b6ff66e..3bc69b32b 100644
--- a/rpc/src/v1/types/derivation.rs
+++ b/rpc/src/v1/types/derivation.rs
@@ -30,6 +30,7 @@ pub enum DerivationType {
 }
 
 /// Derivation request by hash
+#[cfg_attr(not(any(test, feature = "accounts")), allow(unused))]
 #[derive(Deserialize)]
 pub struct DeriveHash {
 	hash: H256,
@@ -37,7 +38,8 @@ pub struct DeriveHash {
 	d_type: DerivationType,
 }
 
-/// Node propertoes in hierarchical derivation request
+/// Node properties in hierarchical derivation request
+#[cfg_attr(not(any(test, feature = "accounts")), allow(unused))]
 #[derive(Deserialize)]
 pub struct DeriveHierarchicalItem {
 	index: u64,