diff --git a/crates/xy/Cargo.toml b/crates/xy/Cargo.toml
index bd6609b..f458b5e 100644
--- a/crates/xy/Cargo.toml
+++ b/crates/xy/Cargo.toml
@@ -8,6 +8,14 @@ license.workspace = true
 name = "xy"
 path = "src/main.rs"
 
+[[bin]]
+name = "xy-test-sleep-server"
+path = "src/bin/xy_test_sleep_server.rs"
+
+[[bin]]
+name = "xy-test-exit-failure"
+path = "src/bin/xy_test_exit_failure.rs"
+
 [dependencies]
 xy-protocol.workspace = true
 xy-supervisor.workspace = true
diff --git a/crates/xy/src/bin/xy_test_exit_failure.rs b/crates/xy/src/bin/xy_test_exit_failure.rs
new file mode 100644
index 0000000..3dd55d4
--- /dev/null
+++ b/crates/xy/src/bin/xy_test_exit_failure.rs
@@ -0,0 +1,4 @@
+fn main() {
+    eprintln!("exit_failure dying immediately");
+    std::process::exit(7);
+}
diff --git a/crates/xy/src/bin/xy_test_sleep_server.rs b/crates/xy/src/bin/xy_test_sleep_server.rs
new file mode 100644
index 0000000..e5110d9
--- /dev/null
+++ b/crates/xy/src/bin/xy_test_sleep_server.rs
@@ -0,0 +1,12 @@
+fn main() {
+    use std::io::Write;
+    let pid = std::process::id();
+    eprintln!("sleep_server start pid={pid}");
+    println!("ready");
+    std::io::stdout().flush().ok();
+    loop {
+        std::thread::sleep(std::time::Duration::from_secs(60));
+        println!("tick");
+        std::io::stdout().flush().ok();
+    }
+}