diff --git a/bridges/bin/runtime-common/src/messages.rs b/bridges/bin/runtime-common/src/messages.rs
index 487fb356f9..52623c42c6 100644
--- a/bridges/bin/runtime-common/src/messages.rs
+++ b/bridges/bin/runtime-common/src/messages.rs
@@ -991,7 +991,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Root,
 				&ThisChainBalance(1),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			),
@@ -1001,7 +1001,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Root,
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			)
@@ -1024,7 +1024,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Signed(ThisChainAccountId(0)),
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			),
@@ -1034,7 +1034,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::None,
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			),
@@ -1044,7 +1044,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Root,
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			)
@@ -1067,7 +1067,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Signed(ThisChainAccountId(0)),
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			),
@@ -1077,7 +1077,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Signed(ThisChainAccountId(1)),
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&test_lane_outbound_data(),
 				&payload,
 			)
@@ -1105,7 +1105,7 @@ mod tests {
 			source::FromThisChainMessageVerifier::<OnThisChainBridge>::verify_message(
 				&Sender::Root,
 				&ThisChainBalance(1_000_000),
-				&TEST_LANE_ID,
+				TEST_LANE_ID,
 				&OutboundLaneData {
 					latest_received_nonce: 100,
 					latest_generated_nonce: 100 + MAXIMAL_PENDING_MESSAGES_AT_TEST_LANE + 1,
diff --git a/bridges/modules/ethereum/src/test_utils.rs b/bridges/modules/ethereum/src/test_utils.rs
index 18ad6876d6..41161089ba 100644
--- a/bridges/modules/ethereum/src/test_utils.rs
+++ b/bridges/modules/ethereum/src/test_utils.rs
@@ -214,7 +214,7 @@ impl HeaderBuilder {
 /// Helper function for getting a genesis header which has been signed by an authority.
 pub fn build_genesis_header(author: &SecretKey) -> AuraHeader {
 	let genesis = HeaderBuilder::genesis();
-	genesis.header.sign_by(&author)
+	genesis.header.sign_by(author)
 }
 
 /// Helper function for building a custom child header which has been signed by an authority.
@@ -222,7 +222,7 @@ pub fn build_custom_header<F>(author: &SecretKey, previous: &AuraHeader, customi
 where
 	F: FnOnce(AuraHeader) -> AuraHeader,
 {
-	let new_header = HeaderBuilder::with_parent(&previous);
+	let new_header = HeaderBuilder::with_parent(previous);
 	let custom_header = customize_header(new_header.header);
 	custom_header.sign_by(author)
 }
diff --git a/bridges/modules/ethereum/src/verification.rs b/bridges/modules/ethereum/src/verification.rs
index c79242d1d4..c8c4deca87 100644
--- a/bridges/modules/ethereum/src/verification.rs
+++ b/bridges/modules/ethereum/src/verification.rs
@@ -396,7 +396,7 @@ mod tests {
 	fn verify_with_config(config: &AuraConfiguration, header: &AuraHeader) -> Result<ImportContext<AccountId>, Error> {
 		run_test_with_genesis(genesis(), TOTAL_VALIDATORS, |_| {
 			let storage = BridgeStorage::<TestRuntime>::new();
-			verify_aura_header(&storage, &config, None, header, &ConstChainTime::default())
+			verify_aura_header(&storage, config, None, header, &ConstChainTime::default())
 		})
 	}
 
@@ -787,7 +787,7 @@ mod tests {
 	fn pool_verifies_future_block_number() {
 		// when header is too far from the future
 		assert_eq!(
-			default_accept_into_pool(|validators| (HeaderBuilder::with_number(100).sign_by_set(&validators), None),),
+			default_accept_into_pool(|validators| (HeaderBuilder::with_number(100).sign_by_set(validators), None),),
 			Err(Error::UnsignedTooFarInTheFuture),
 		);
 	}
@@ -800,7 +800,7 @@ mod tests {
 			default_accept_into_pool(|validators| (
 				HeaderBuilder::with_parent_number(3)
 					.step(GENESIS_STEP + 3)
-					.sign_by_set(&validators),
+					.sign_by_set(validators),
 				None,
 			),),
 			Err(Error::DoubleVote),