diff --git a/Cargo.toml b/Cargo.toml
index 2265bdc..31d5490 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -46,6 +46,10 @@ suspicious = "deny"
 name = "lud06"
 required-features = ["client", "server"]
 
+[[test]]
+name = "lud11"
+required-features = ["client", "server"]
+
 [[test]]
 name = "lud12"
 required-features = ["client", "server"]
diff --git a/tests/lud11.rs b/tests/lud11.rs
new file mode 100644
index 0000000..9f28def
--- /dev/null
+++ b/tests/lud11.rs
@@ -0,0 +1,62 @@
+#[tokio::test]
+async fn test() {
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:0")
+        .await
+        .expect("net");
+
+    let addr = listener.local_addr().expect("addr");
+
+    let query_url = format!("http://{addr}/lnurlp");
+    let callback_url = url::Url::parse(&format!("http://{addr}/lnurlp/callback")).expect("url");
+
+    let router = lnurlkit::server::Server::default()
+        .pay_request(
+            move || {
+                let callback = callback_url.clone();
+                async {
+                    Ok(lnurlkit::core::pay_request::PayRequest {
+                        callback,
+                        short_description: String::new(),
+                        long_description: None,
+                        success_action: None,
+                        jpeg: None,
+                        png: None,
+                        comment_size: 0,
+                        min: 314,
+                        max: 315,
+                    })
+                }
+            },
+            move |(amount, _)| async move {
+                Ok(lnurlkit::core::pay_request::CallbackResponse {
+                    pr: String::new(),
+                    disposable: amount % 2 == 0,
+                })
+            },
+        )
+        .build();
+
+    tokio::spawn(async move {
+        axum::serve(listener, router).await.expect("serve");
+    });
+
+    let client = lnurlkit::client::Client::default();
+
+    let lnurl = bech32::encode(
+        "lnurl",
+        bech32::ToBase32::to_base32(&query_url),
+        bech32::Variant::Bech32,
+    )
+    .expect("lnurl");
+
+    let queried = client.query(&lnurl).await.expect("query");
+    let lnurlkit::client::Query::PayRequest(pr) = queried else {
+        panic!("not pay request");
+    };
+
+    let invoice = pr.clone().callback("", 314).await.expect("callback");
+    assert!(invoice.disposable);
+
+    let invoice = pr.callback("", 315).await.expect("callback");
+    assert!(!invoice.disposable);
+}
diff --git a/tests/lud12.rs b/tests/lud12.rs
index c62ee57..48a9f3a 100644
--- a/tests/lud12.rs
+++ b/tests/lud12.rs
@@ -16,8 +16,8 @@ async fn test() {
                 async {
                     Ok(lnurlkit::core::pay_request::PayRequest {
                         callback,
-                        short_description: String::from("today i become death"),
-                        long_description: Some(String::from("the destroyer of worlds")),
+                        short_description: String::new(),
+                        long_description: None,
                         success_action: None,
                         jpeg: None,
                         png: None,