diff --git a/src/tests/ckb_rpc.rs b/src/tests/ckb_rpc.rs
index 72161d0..02c8fec 100644
--- a/src/tests/ckb_rpc.rs
+++ b/src/tests/ckb_rpc.rs
@@ -211,6 +211,22 @@ fn test_cargo_hang_6() {
     let block = RUNTIME.with(|rt| rt.block_on(a));
     // let block = block.unwrap();
     // assert!(block.is_none());
+    println!("{:?}", block);
+    println!("999");
+}
+
+#[test]
+fn test_cargo_hang_7() {
+    use std::cell::LazyCell;
+    thread_local! {
+        pub static RUNTIME: LazyCell<tokio::runtime::Runtime> =
+        LazyCell::new(|| tokio::runtime::Builder::new_current_thread().enable_all().build().unwrap());
+    }
+    let a = async { "1" };
+    let block = RUNTIME.with(|rt| rt.block_on(a));
+    // let block = block.unwrap();
+    // assert!(block.is_none());
+    println!("{:?}", block);
     println!("999");
 }