diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index d51a89c84b1..73c3cde90d3 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -2272,8 +2272,7 @@ impl ScheduleInfo for Client {
 }
 
 impl ImportSealedBlock for Client {
-	fn import_sealed_block(&self, block: SealedBlock) -> ImportResult {
-		let h = block.header().hash();
+	fn import_sealed_block(&self, block: SealedBlock) -> EthcoreResult<H256> {
 		let start = Instant::now();
 		let header = block.header().clone();
 		let route = {
diff --git a/ethcore/src/engines/authority_round/mod.rs b/ethcore/src/engines/authority_round/mod.rs
index b7f0b4663ac..2cb236e98b8 100644
--- a/ethcore/src/engines/authority_round/mod.rs
+++ b/ethcore/src/engines/authority_round/mod.rs
@@ -1626,10 +1626,10 @@ mod tests {
 		// Two validators.
 		// Spec starts with step 2.
 		header.set_seal(vec![encode(&5usize), encode(&(&*signature as &[u8]))]);
-		header.set_difficulty(calculate_score(U256::from(4), U256::from(5), U256::zero()));
+		header.set_difficulty(calculate_score(4, 5, 0));
 		assert!(engine.verify_block_family(&header, &parent_header).is_ok());
 		header.set_seal(vec![encode(&3usize), encode(&(&*signature as &[u8]))]);
-		header.set_difficulty(calculate_score(U256::from(4), U256::from(3), U256::zero()));
+		header.set_difficulty(calculate_score(4, 3, 0));
 		assert!(engine.verify_block_family(&header, &parent_header).is_err());
 	}