diff --git a/testnet/stacks-node/src/config.rs b/testnet/stacks-node/src/config.rs
index 788f8e7f5..6665785a8 100644
--- a/testnet/stacks-node/src/config.rs
+++ b/testnet/stacks-node/src/config.rs
@@ -239,7 +239,7 @@ impl ConfigFile {
             rpc_port: Some(18332),
             peer_port: Some(18333),
             peer_host: Some("bitcoind.xenon.blockstack.org".to_string()),
-            magic_bytes: Some("X3".into()),
+            magic_bytes: Some("X4".into()),
             ..BurnchainConfigFile::default()
         };
 
diff --git a/testnet/stacks-node/src/tests/neon_integrations.rs b/testnet/stacks-node/src/tests/neon_integrations.rs
index 3582d145f..9ddba59f0 100644
--- a/testnet/stacks-node/src/tests/neon_integrations.rs
+++ b/testnet/stacks-node/src/tests/neon_integrations.rs
@@ -62,7 +62,7 @@ fn neon_integration_test_conf() -> (Config, StacksAddress) {
     let magic_bytes = Config::from_config_file(ConfigFile::xenon())
         .burnchain
         .magic_bytes;
-    assert_eq!(magic_bytes.as_bytes(), &['X' as u8, '3' as u8]);
+    assert_eq!(magic_bytes.as_bytes(), &['X' as u8, '4' as u8]);
     conf.burnchain.magic_bytes = magic_bytes;
     conf.burnchain.poll_time_secs = 1;
     conf.node.pox_sync_sample_secs = 1;