diff --git a/src/wasm/ast_node.rs b/src/wasm/ast_node.rs
index 8545b42..5dd7196 100644
--- a/src/wasm/ast_node.rs
+++ b/src/wasm/ast_node.rs
@@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use serde::Serialize;
 
 use super::angle_link::WasmAngleLink;
@@ -58,6 +60,34 @@ use super::timestamp::WasmTimestamp;
 use super::underline::WasmUnderline;
 use super::verbatim::WasmVerbatim;
 use super::verse_block::WasmVerseBlock;
+use super::WasmStandardProperties;
+
+#[derive(Debug, Serialize)]
+pub(crate) struct WasmAstWrapper<'b, 's, 'p, I> {
+    #[serde(rename = "ast-node")]
+    pub(crate) ast_node: Cow<'s, str>,
+    #[serde(rename = "standard-properties")]
+    pub(crate) standard_properties: &'b WasmStandardProperties,
+    #[serde(rename = "properties")]
+    pub(crate) inner: I,
+    pub(crate) children: &'b Vec<WasmAstNode<'s, 'p>>,
+}
+
+impl<'b, 's, 'p, I> WasmAstWrapper<'b, 's, 'p, I> {
+    pub(crate) fn new(
+        ast_node: Cow<'s, str>,
+        standard_properties: &'b WasmStandardProperties,
+        inner: I,
+        children: &'b Vec<WasmAstNode<'s, 'p>>,
+    ) -> WasmAstWrapper<'b, 's, 'p, I> {
+        WasmAstWrapper {
+            ast_node,
+            standard_properties,
+            inner,
+            children,
+        }
+    }
+}
 
 #[derive(Debug, Serialize)]
 #[serde(untagged)]
diff --git a/src/wasm/document.rs b/src/wasm/document.rs
index 9e812c7..e7a006f 100644
--- a/src/wasm/document.rs
+++ b/src/wasm/document.rs
@@ -5,6 +5,7 @@ use serde::Serialize;
 use super::additional_property::AdditionalProperties;
 use super::additional_property::AdditionalPropertyValue;
 use super::ast_node::WasmAstNode;
+use super::ast_node::WasmAstWrapper;
 use super::macros::to_wasm;
 use super::standard_properties::WasmStandardProperties;
 use super::to_wasm::ToWasm;
@@ -14,7 +15,7 @@ use crate::types::Document;
 use crate::wasm::to_wasm::ToWasmStandardProperties;
 
 #[derive(Debug, Serialize)]
-#[serde(tag = "__ast_node")]
+#[serde(tag = "ast_node")]
 #[serde(rename = "org-data")]
 pub struct WasmDocument<'s, 'p> {
     #[serde(rename = "standard-properties")]
@@ -85,3 +86,16 @@ impl<'s, 'p> ElispFact<'s> for WasmDocument<'s, 'p> {
         "org-data".into()
     }
 }
+
+impl<'b, 's, 'p> Into<WasmAstWrapper<'b, 's, 'p, &'b WasmDocument<'s, 'p>>>
+    for &'b WasmDocument<'s, 'p>
+{
+    fn into(self) -> WasmAstWrapper<'b, 's, 'p, &'b WasmDocument<'s, 'p>> {
+        WasmAstWrapper::new(
+            self.get_elisp_name(),
+            &self.standard_properties,
+            self,
+            &self.children,
+        )
+    }
+}
diff --git a/src/wasm_test/compare.rs b/src/wasm_test/compare.rs
index a5033fd..a7f62b8 100644
--- a/src/wasm_test/compare.rs
+++ b/src/wasm_test/compare.rs
@@ -87,7 +87,7 @@ fn compare_json_value<'b, 's>(
     emacs: &'b Token<'s>,
 ) -> Result<WasmDiffResult<'s>, Box<dyn std::error::Error>> {
     match (value, emacs) {
-        (serde_json::Value::Object(wasm), Token::List(el)) if wasm.contains_key("__ast_node") => {
+        (serde_json::Value::Object(wasm), Token::List(el)) if wasm.contains_key("ast_node") => {
             // We hit a regular ast node.
             compare_ast_node(source, el, wasm)
         }
@@ -133,7 +133,7 @@ fn compare_ast_node<'b, 's, 'p>(
             .ok_or("Should have a name as the first child.")?
             .as_atom()?;
         let wasm_name = wasm
-            .get("__ast_node")
+            .get("ast_node")
             .ok_or("Should have a ast node type.")?
             .as_str()
             .ok_or("Ast node type should be a string.")?;