diff --git a/packages/core/src/helpers/getDebugJSON.ts b/packages/core/src/helpers/getDebugJSON.ts
index 34c7e8af..fdd25fda 100644
--- a/packages/core/src/helpers/getDebugJSON.ts
+++ b/packages/core/src/helpers/getDebugJSON.ts
@@ -6,45 +6,41 @@ interface DebugJSONContent extends JSONContent {
   to: number,
 }
 
-/**
- * Returns a node tree with node positions.
- */
-export default function getDebugJSON(node: ProseMirrorNode, startOffset = 0) {
-  const nodes: DebugJSONContent[] = []
+export default function getDebugJSON(node: ProseMirrorNode, startOffset = 0): DebugJSONContent {
+  const isTopNode = node.type === node.type.schema.topNodeType
+  const increment = isTopNode ? 0 : 1
+  const from = startOffset // + offset
+  const to = from + node.nodeSize
+  const marks = node.marks.map(mark => ({
+    type: mark.type.name,
+    attrs: { ...mark.attrs },
+  }))
+  const attrs = { ...node.attrs }
+  const output: DebugJSONContent = {
+    type: node.type.name,
+    from,
+    to,
+  }
 
-  node.forEach((n, offset) => {
-    const from = startOffset + offset
-    const to = from + n.nodeSize
-    const marks = n.marks.map(mark => ({
-      type: mark.type.name,
-      attrs: { ...mark.attrs },
-    }))
-    const attrs = { ...n.attrs }
-    const content = getDebugJSON(n, from + 1)
-    const output: DebugJSONContent = {
-      type: n.type.name,
-      from,
-      to,
-    }
+  if (Object.keys(attrs).length) {
+    output.attrs = attrs
+  }
 
-    if (Object.keys(attrs).length) {
-      output.attrs = attrs
-    }
+  if (marks.length) {
+    output.marks = marks
+  }
 
-    if (marks.length) {
-      output.marks = marks
-    }
+  if (node.content.childCount) {
+    output.content = []
 
-    if (content.length) {
-      output.content = content
-    }
+    node.forEach((child, offset) => {
+      output.content?.push(getDebugJSON(child, startOffset + offset + increment))
+    })
+  }
 
-    if (n.text) {
-      output.text = n.text
-    }
+  if (node.text) {
+    output.text = node.text
+  }
 
-    nodes.push(output)
-  })
-
-  return nodes
+  return output
 }