diff --git a/primitives/header-chain/src/justification.rs b/primitives/header-chain/src/justification.rs
index 08cf1be1..92e5009a 100644
--- a/primitives/header-chain/src/justification.rs
+++ b/primitives/header-chain/src/justification.rs
@@ -24,7 +24,7 @@ use codec::{Decode, Encode};
 use finality_grandpa::voter_set::VoterSet;
 use scale_info::TypeInfo;
 // substrate
-use frame_support::RuntimeDebug;
+use frame_support::{RuntimeDebug, RuntimeDebugNoBound};
 use sp_consensus_grandpa::{AuthorityId, AuthoritySignature, SetId};
 use sp_runtime::traits::Header as HeaderT;
 use sp_std::{
@@ -37,7 +37,7 @@ use sp_std::{
 ///
 /// This particular proof is used to prove that headers on a bridged chain
 /// (so not our chain) have been finalized correctly.
-#[derive(Clone, PartialEq, Eq, Encode, Decode, RuntimeDebug, TypeInfo)]
+#[derive(Clone, PartialEq, Eq, Encode, Decode, RuntimeDebugNoBound, TypeInfo)]
 pub struct GrandpaJustification<Header: HeaderT> {
 	/// The round (voting period) this justification is valid for.
 	pub round: u64,
diff --git a/primitives/test-utils/src/keyring.rs b/primitives/test-utils/src/keyring.rs
index 6590a99a..d84f55b6 100644
--- a/primitives/test-utils/src/keyring.rs
+++ b/primitives/test-utils/src/keyring.rs
@@ -90,5 +90,5 @@ pub fn test_keyring() -> Vec<(Account, AuthorityWeight)> {
 
 /// Get a list of "unique" accounts.
 pub fn accounts(len: u16) -> Vec<Account> {
-	(0..len).into_iter().map(Account).collect()
+	(0..len).map(Account).collect()
 }