diff --git a/src/tests/ckb_rpc.rs b/src/tests/ckb_rpc.rs
index 4869da3..293838d 100644
--- a/src/tests/ckb_rpc.rs
+++ b/src/tests/ckb_rpc.rs
@@ -194,6 +194,20 @@ fn test_cargo_hang_5() {
     println!("999");
 }
 
+#[test]
+fn test_cargo_hang_6() {
+    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!("999");
+}
+
 #[test]
 fn test_get_packed_block_with_cycles_fail() {
     let ckb_client = CkbRpcClient::new(TEST_CKB_RPC_URL);