diff --git a/rpc/src/v1/helpers/subscription_manager.rs b/rpc/src/v1/helpers/subscription_manager.rs
index 597a08f33eb..b2dacba882b 100644
--- a/rpc/src/v1/helpers/subscription_manager.rs
+++ b/rpc/src/v1/helpers/subscription_manager.rs
@@ -165,7 +165,7 @@ mod tests {
 		let mut el = Runtime::new().unwrap();
 		let mut poll_manager = poll_manager();
 		let (id, rx) = poll_manager.subscribe(Default::default(), "hello".into(), Params::None);
-		assert_eq!(id, SubscriptionId::String("0x4333966aca52ad0b".into()));
+		assert_eq!(id, SubscriptionId::String("0x43ca64edf03768e1".into()));
 
 		// then
 		poll_manager.tick().wait().unwrap();
diff --git a/rpc/src/v1/tests/mocked/eth_pubsub.rs b/rpc/src/v1/tests/mocked/eth_pubsub.rs
index 86938d8f470..7aee32307e9 100644
--- a/rpc/src/v1/tests/mocked/eth_pubsub.rs
+++ b/rpc/src/v1/tests/mocked/eth_pubsub.rs
@@ -62,13 +62,13 @@ fn should_subscribe_to_new_heads() {
 
 	// Subscribe
 	let request = r#"{"jsonrpc": "2.0", "method": "eth_subscribe", "params": ["newHeads"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":"0x4333966aca52ad0b","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x43ca64edf03768e1","id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata.clone()), Some(response.to_owned()));
 
 	// Check notifications
 	handler.new_blocks(NewBlocks::new(vec![], vec![], ChainRoute::new(vec![(h1, ChainRouteType::Enacted)]), vec![], vec![], DURATION_ZERO, true));
 	let (res, receiver) = receiver.into_future().wait().unwrap();
-	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x1","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x1","parentHash":"0x0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x4333966aca52ad0b"}}"#;
+	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x1","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x1","parentHash":"0x0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// Notify about two blocks
@@ -76,14 +76,14 @@ fn should_subscribe_to_new_heads() {
 
 	// Receive both
 	let (res, receiver) = receiver.into_future().wait().unwrap();
-	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x2","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0x44e5ecf454ea99af9d8a8f2ca0daba96964c90de05db7a78f59b84ae9e749706","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x2","parentHash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x4333966aca52ad0b"}}"#;
+	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x2","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0x44e5ecf454ea99af9d8a8f2ca0daba96964c90de05db7a78f59b84ae9e749706","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x2","parentHash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 	let (res, receiver) = receiver.into_future().wait().unwrap();
-	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x3","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0xdf04a98bb0c6fa8441bd429822f65a46d0cb553f6bcef602b973e65c81497f8e","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x3","parentHash":"0x44e5ecf454ea99af9d8a8f2ca0daba96964c90de05db7a78f59b84ae9e749706","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x4333966aca52ad0b"}}"#;
+	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"author":"0x0000000000000000000000000000000000000000","difficulty":"0x3","extraData":"0x","gasLimit":"0xf4240","gasUsed":"0x0","hash":"0xdf04a98bb0c6fa8441bd429822f65a46d0cb553f6bcef602b973e65c81497f8e","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","number":"0x3","parentHash":"0x44e5ecf454ea99af9d8a8f2ca0daba96964c90de05db7a78f59b84ae9e749706","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sealFields":[],"sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1c9","stateRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","timestamp":"0x0","transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},"subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// And unsubscribe
-	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x4333966aca52ad0b"], "id": 1}"#;
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x43ca64edf03768e1"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata), Some(response.to_owned()));
 
@@ -132,7 +132,7 @@ fn should_subscribe_to_logs() {
 
 	// Subscribe
 	let request = r#"{"jsonrpc": "2.0", "method": "eth_subscribe", "params": ["logs", {}], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":"0x4333966aca52ad0b","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x43ca64edf03768e1","id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata.clone()), Some(response.to_owned()));
 
 	// Check notifications (enacted)
@@ -140,7 +140,7 @@ fn should_subscribe_to_logs() {
 	let (res, receiver) = receiver.into_future().wait().unwrap();
 	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"address":"0x0000000000000000000000000000000000000005","blockHash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","blockNumber":"0x1","data":"0x","logIndex":"0x0","removed":false,"topics":["0x0000000000000000000000000000000000000000000000000000000000000001","0x0000000000000000000000000000000000000000000000000000000000000002","0x0000000000000000000000000000000000000000000000000000000000000000","0x0000000000000000000000000000000000000000000000000000000000000000"],"transactionHash":""#.to_owned()
 		+ &format!("0x{:x}", tx_hash)
-		+ r#"","transactionIndex":"0x0","transactionLogIndex":"0x0","type":"mined"},"subscription":"0x4333966aca52ad0b"}}"#;
+		+ r#"","transactionIndex":"0x0","transactionLogIndex":"0x0","type":"mined"},"subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// Check notifications (retracted)
@@ -148,11 +148,11 @@ fn should_subscribe_to_logs() {
 	let (res, receiver) = receiver.into_future().wait().unwrap();
 	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":{"address":"0x0000000000000000000000000000000000000005","blockHash":"0x3457d2fa2e3dd33c78ac681cf542e429becf718859053448748383af67e23218","blockNumber":"0x1","data":"0x","logIndex":"0x0","removed":true,"topics":["0x0000000000000000000000000000000000000000000000000000000000000001","0x0000000000000000000000000000000000000000000000000000000000000002","0x0000000000000000000000000000000000000000000000000000000000000000","0x0000000000000000000000000000000000000000000000000000000000000000"],"transactionHash":""#.to_owned()
 		+ &format!("0x{:x}", tx_hash)
-		+ r#"","transactionIndex":"0x0","transactionLogIndex":"0x0","type":"removed"},"subscription":"0x4333966aca52ad0b"}}"#;
+		+ r#"","transactionIndex":"0x0","transactionLogIndex":"0x0","type":"removed"},"subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// And unsubscribe
-	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x4333966aca52ad0b"], "id": 1}"#;
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x43ca64edf03768e1"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata), Some(response.to_owned()));
 
@@ -185,22 +185,22 @@ fn should_subscribe_to_pending_transactions() {
 
 	// Subscribe
 	let request = r#"{"jsonrpc": "2.0", "method": "eth_subscribe", "params": ["newPendingTransactions"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":"0x4333966aca52ad0b","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x43ca64edf03768e1","id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata.clone()), Some(response.to_owned()));
 
 	// Send new transactions
 	pool_sender.unbounded_send(Arc::new(vec![H256::from_low_u64_be(5), H256::from_low_u64_be(7)])).unwrap();
 
 	let (res, receiver) = receiver.into_future().wait().unwrap();
-	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":"0x0000000000000000000000000000000000000000000000000000000000000005","subscription":"0x4333966aca52ad0b"}}"#;
+	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":"0x0000000000000000000000000000000000000000000000000000000000000005","subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	let (res, receiver) = receiver.into_future().wait().unwrap();
-	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":"0x0000000000000000000000000000000000000000000000000000000000000007","subscription":"0x4333966aca52ad0b"}}"#;
+	let response = r#"{"jsonrpc":"2.0","method":"eth_subscription","params":{"result":"0x0000000000000000000000000000000000000000000000000000000000000007","subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// And unsubscribe
-	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x4333966aca52ad0b"], "id": 1}"#;
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x43ca64edf03768e1"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata), Some(response.to_owned()));
 
@@ -224,8 +224,7 @@ fn eth_subscribe_syncing() {
 	let (sender, _receiver) = futures::sync::mpsc::channel(8);
 	metadata.session = Some(Arc::new(Session::new(sender)));
 
-	// Subscribe
-	let response = r#"{"jsonrpc":"2.0","result":"0x4333966aca52ad0b","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x43ca64edf03768e1","id":1}"#;
 	let request = r#"{"jsonrpc": "2.0", "method": "eth_subscribe", "params": ["syncing"], "id": 1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata.clone()), Some(response.to_owned()));
 }
diff --git a/rpc/src/v1/tests/mocked/pubsub.rs b/rpc/src/v1/tests/mocked/pubsub.rs
index 077e69e5a11..a0fafa4ba74 100644
--- a/rpc/src/v1/tests/mocked/pubsub.rs
+++ b/rpc/src/v1/tests/mocked/pubsub.rs
@@ -53,22 +53,22 @@ fn should_subscribe_to_a_method() {
 
 	// Subscribe
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_subscribe", "params": ["hello", []], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":"0x4333966aca52ad0b","id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x43ca64edf03768e1","id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata.clone()), Some(response.to_owned()));
 
 	// Check notifications
 	let (res, receiver) = receiver.into_future().wait().unwrap();
 	let response =
-		r#"{"jsonrpc":"2.0","method":"parity_subscription","params":{"result":"hello","subscription":"0x4333966aca52ad0b"}}"#;
+		r#"{"jsonrpc":"2.0","method":"parity_subscription","params":{"result":"hello","subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	let (res, receiver) = receiver.into_future().wait().unwrap();
 	let response =
-		r#"{"jsonrpc":"2.0","method":"parity_subscription","params":{"result":"world","subscription":"0x4333966aca52ad0b"}}"#;
+		r#"{"jsonrpc":"2.0","method":"parity_subscription","params":{"result":"world","subscription":"0x43ca64edf03768e1"}}"#;
 	assert_eq!(res, Some(response.into()));
 
 	// And unsubscribe
-	let request = r#"{"jsonrpc": "2.0", "method": "parity_unsubscribe", "params": ["0x4333966aca52ad0b"], "id": 1}"#;
+	let request = r#"{"jsonrpc": "2.0", "method": "parity_unsubscribe", "params": ["0x43ca64edf03768e1"], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
 	assert_eq!(io.handle_request_sync(request, metadata), Some(response.to_owned()));