diff --git a/crates/ptth_quic/src/executable_relay_server.rs b/crates/ptth_quic/src/executable_relay_server.rs
index c7321b8..f84b8ff 100644
--- a/crates/ptth_quic/src/executable_relay_server.rs
+++ b/crates/ptth_quic/src/executable_relay_server.rs
@@ -18,14 +18,14 @@ use crate::prelude::*;
 use protocol::PeerId;
 
 #[derive (Debug, StructOpt)]
-pub struct Opt {
+pub (crate) struct Opt {
 	#[structopt (long)]
-	listen_addr: Option <String>,
+	pub (crate) listen_addr: Option <String>,
 	#[structopt (long)]
-	tcp_listen_port: Option <u16>,
+	pub (crate) tcp_listen_port: Option <u16>,
 }
 
-pub async fn main (opt: Opt) -> anyhow::Result <()> 
+pub (crate) async fn main (opt: Opt) -> anyhow::Result <()> 
 {
 	let listen_addr = opt.listen_addr.unwrap_or_else (|| String::from ("0.0.0.0:30380")).parse ()?;
 	let (endpoint, server_cert) = make_server_endpoint (listen_addr)?;
diff --git a/crates/ptth_quic/src/tests.rs b/crates/ptth_quic/src/tests.rs
index d110bc6..ff41920 100644
--- a/crates/ptth_quic/src/tests.rs
+++ b/crates/ptth_quic/src/tests.rs
@@ -6,9 +6,16 @@ fn end_to_end () -> anyhow::Result <()> {
 }
 
 async fn end_to_end_async () -> anyhow::Result <()> {
+	use crate::executable_relay_server as relay;
 	
-	
-	// let task_relay = crate::executable_relay_server::main ();
+	let relay_opt = relay::Opt {
+		listen_addr: "127.0.0.1:30381".to_string ().into (),
+		tcp_listen_port: 8001.into (),
+	};
+	let task_relay = tokio::spawn (async move {
+		relay::main (relay_opt).await?;
+		Ok::<_, anyhow::Error> (())
+	});
 	
 	Ok (())
 }