diff --git a/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main_js.mbt b/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main_js.mbt
index 6dfb3a35..d00e7a78 100644
--- a/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main_js.mbt
+++ b/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main_js.mbt
@@ -4,7 +4,7 @@ pub fn get_args() -> Array[String] {
 
 extern "js" fn get_cli_args_internal() -> Array[String] =
   #| function() {
-  #|  return process.argv.slice(2);
+  #|  return process.argv;
   #| }
 
 fn main {
diff --git a/crates/moonrun/src/sys_api.rs b/crates/moonrun/src/sys_api.rs
index 1bd5f61c..4791f185 100644
--- a/crates/moonrun/src/sys_api.rs
+++ b/crates/moonrun/src/sys_api.rs
@@ -47,13 +47,15 @@ fn construct_args_list<'s>(
     args: &[String],
     scope: &mut v8::HandleScope<'s>,
 ) -> v8::Local<'s, v8::Array> {
+    // align with node's behavior
+    // use this concat instead of std::env::args(), to ignore the possible --
     let cli_args: Vec<String> = std::env::args()
         // path of moonrun and the path of the wasm file
         .take(2)
         .chain(args.iter().cloned())
         .collect();
 
-    let arr = v8::Array::new(scope, args.len() as i32);
+    let arr = v8::Array::new(scope, cli_args.len() as i32);
     for (i, arg) in cli_args.iter().enumerate() {
         let arg = v8::String::new(scope, arg).unwrap();
         arr.set_index(scope, i as u32, arg.into());