diff --git a/core/src/genesis.rs b/core/src/genesis.rs
index b0f72b79e..eda2745b1 100644
--- a/core/src/genesis.rs
+++ b/core/src/genesis.rs
@@ -106,11 +106,12 @@ pub fn genesis_testnet3() -> core::Block {
 }
 
 /// 4th testnet genesis block (cuckatoo29 AR, 30+ AF). Temporary values for now (Pow won't verify)
+/// NB: Currently set to intenal pre-testnet values
 pub fn genesis_testnet4() -> core::Block {
 	core::Block::with_header(core::BlockHeader {
 		height: 0,
 		previous: core::hash::Hash([0xff; 32]),
-		timestamp: Utc.ymd(2018, 8, 30).and_hms(18, 0, 0),
+		timestamp: Utc.ymd(2018, 10, 15).and_hms(12, 0, 0),
 		pow: ProofOfWork {
 			total_difficulty: Difficulty::from_num(global::initial_block_difficulty()),
 			scaling_difficulty: 1,
diff --git a/wallet/src/types.rs b/wallet/src/types.rs
index 97792e164..497a8f0c6 100644
--- a/wallet/src/types.rs
+++ b/wallet/src/types.rs
@@ -57,7 +57,7 @@ pub struct WalletConfig {
 impl Default for WalletConfig {
 	fn default() -> WalletConfig {
 		WalletConfig {
-			chain_type: Some(ChainTypes::Testnet3),
+			chain_type: Some(ChainTypes::Testnet4),
 			api_listen_interface: "127.0.0.1".to_string(),
 			api_listen_port: 13415,
 			api_secret_path: Some(".api_secret".to_string()),