diff --git a/src/ast/message_id.rs b/src/ast/message_id.rs
index da93ee8..6b87e6b 100644
--- a/src/ast/message_id.rs
+++ b/src/ast/message_id.rs
@@ -74,11 +74,14 @@ mod tests {
     use crate::MessageId;
 
     #[test]
+    #[expect(clippy::unreadable_literal)]
     fn extended_message_id_raw() {
         let id = MessageId::Extended(2);
         assert_eq!(id.raw(), 2 | 1 << 31);
-        let id = MessageId::Extended(2 ^ 29);
-        assert_eq!(id.raw(), 2 ^ 29 | 1 << 31);
+
+        // test with all 29 bits set
+        let id = MessageId::Extended(0x1FFF_FFFF);
+        assert_eq!(id.raw(), 0b10011111_11111111_11111111_11111111);
     }
 
     #[test]