diff --git a/src/config.rs b/src/config.rs
index decbbaf..4dc8cde 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -240,6 +240,22 @@ pub fn wallet_owner_secret_path(chain_type: &ChainTypes) -> PathBuf {
 	path
 }
 
+pub fn grin_node_url(chain_type: &ChainTypes) -> SocketAddr {
+	if *chain_type == ChainTypes::Testnet {
+		"127.0.0.1:13413".parse().unwrap()
+	} else {
+		"127.0.0.1:3413".parse().unwrap()
+	}
+}
+
+pub fn wallet_owner_url(chain_type: &ChainTypes) -> SocketAddr {
+	if *chain_type == ChainTypes::Testnet {
+		"127.0.0.1:13420".parse().unwrap()
+	} else {
+		"127.0.0.1:3420".parse().unwrap()
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;
diff --git a/src/main.rs b/src/main.rs
index 7425812..f68e400 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -70,14 +70,20 @@ fn real_main() -> Result<(), Box<dyn std::error::Error>> {
 			key: secp::random_secret(),
 			interval_s: round_time.unwrap_or(DEFAULT_INTERVAL),
 			addr: bind_addr.unwrap_or("0.0.0.0:3000").parse()?,
-			grin_node_url: grin_node_url.unwrap_or("127.0.0.1:3413").parse()?,
+			grin_node_url: match grin_node_url {
+				Some(u) => u.parse()?,
+				None => config::grin_node_url(&chain_type),
+			},
 			grin_node_secret_path: match grin_node_secret_path {
 				Some(p) => Some(p.to_owned()),
 				None => config::node_secret_path(&chain_type)
 					.to_str()
 					.map(|p| p.to_owned()),
 			},
-			wallet_owner_url: wallet_owner_url.unwrap_or("127.0.0.1:3420").parse()?,
+			wallet_owner_url: match wallet_owner_url {
+				Some(u) => u.parse()?,
+				None => config::wallet_owner_url(&chain_type),
+			},
 			wallet_owner_secret_path: match wallet_owner_secret_path {
 				Some(p) => Some(p.to_owned()),
 				None => config::wallet_owner_secret_path(&chain_type)