diff --git a/aos_wasm_stress_test/src/main.rs b/aos_wasm_stress_test/src/main.rs
index 0d893eb..7abe348 100644
--- a/aos_wasm_stress_test/src/main.rs
+++ b/aos_wasm_stress_test/src/main.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 
-use libwasm::{driver::DriverExitCode, get_input};
+use libwasm::driver::DriverExitCode;
 
 #[no_mangle]
 fn start() -> i32 {
@@ -11,9 +11,9 @@ fn start() -> i32 {
         send_signal(PID(1), Signals::Quit);
         rand = get_random();
         ret = 1;
-        let x = b"Hi there";
+        let x = b"Hi there\n";
         for i in x {
-            print_char(*i as i64);
+            print_char(*i as i32);
         }
     }
 
@@ -39,5 +39,5 @@ use {
 mod panic;
 
 extern "C" {
-    fn print_char(c: i64);
+    fn print_char(c: i32);
 }