Assume :standard-properties is an expected field.

src/compare/macros.rs

@@ -1,9 +1,3 @@
-#[derive(Debug)]
-pub(crate) enum EmacsField<'s> {
-    Required(&'s str),
-    Optional(&'s str),
-}
-
 /// Create iterators for ast nodes where it only has to iterate over children
 macro_rules! compare_properties {
     ($emacs:expr, $($emacs_field:expr, $rust_value:expr, $compare_fn: ident),+) => {
@@ -16,7 +10,7 @@ macro_rules! compare_properties {
             .nth(1)
             .ok_or("Should have an attributes child.")?;
             let attributes_map = attributes_child.as_map()?;
-            let mut emacs_keys: BTreeSet<&str> = attributes_map.keys().map(|s| *s).collect();
+            let mut emacs_keys: BTreeSet<&str> = attributes_map.keys().map(|s| *s).filter(|s| *s != ":standard-properties").collect();
             $(
             match $emacs_field {
                 EmacsField::Required(name) if emacs_keys.contains(name) => {