diff --git a/stdlib/src/sync.rs b/stdlib/src/sync.rs
index bdb50b9e..b21c911f 100644
--- a/stdlib/src/sync.rs
+++ b/stdlib/src/sync.rs
@@ -125,4 +125,35 @@ mod tests {
         let guard = mutex.locked.lock().unwrap();
         assert_eq!(*guard, false);
     }
+
+    #[test]
+    fn test_script_mutex_lock() {
+        use std::sync::Arc;
+        use std::thread;
+        use std::time::Duration;
+        use std::sync::atomic::{AtomicBool, Ordering};
+
+        let mutex = Arc::new(ScriptMutex::new());
+        let mutex_clone = Arc::clone(&mutex);
+        let flag = Arc::new(AtomicBool::new(false));
+        let flag_clone = Arc::clone(&flag);
+
+        mutex.lock();
+
+        let handle = thread::spawn(move || {
+            mutex_clone.lock();
+            flag_clone.store(true, Ordering::SeqCst);
+            mutex_clone.unlock();
+        });
+
+        thread::sleep(Duration::from_millis(50));
+        // Verify the second thread is blocked and hasn't set the flag
+        assert_eq!(flag.load(Ordering::SeqCst), false);
+
+        mutex.unlock();
+
+        handle.join().unwrap();
+        // Verify the second thread acquired the lock and set the flag
+        assert_eq!(flag.load(Ordering::SeqCst), true);
+    }
 }