diff --git a/src/Umbraco.Web.UI.Client/src/mocks/data/data-type/data-type.db.ts b/src/Umbraco.Web.UI.Client/src/mocks/data/data-type/data-type.db.ts
index b6108cf716..fad4ede41a 100644
--- a/src/Umbraco.Web.UI.Client/src/mocks/data/data-type/data-type.db.ts
+++ b/src/Umbraco.Web.UI.Client/src/mocks/data/data-type/data-type.db.ts
@@ -1,7 +1,6 @@
 import { UmbEntityMockDbBase } from '../utils/entity/entity-base.js';
 import { UmbMockEntityFolderManager } from '../utils/entity/entity-folder.manager.js';
 import { UmbMockEntityTreeManager } from '../utils/entity/entity-tree.manager.js';
-import { folderTreeItemMapper } from '../utils.js';
 import { UmbMockEntityItemManager } from '../utils/entity/entity-item.manager.js';
 import { UmbMockEntityDetailManager } from '../utils/entity/entity-detail.manager.js';
 import type { UmbMockDataTypeModel } from './data-type.data.js';
@@ -12,10 +11,11 @@ import type {
 	CreateFolderRequestModel,
 	DataTypeItemResponseModel,
 	DataTypeResponseModel,
+	DataTypeTreeItemResponseModel,
 } from '@umbraco-cms/backoffice/external/backend-api';
 
 class UmbDataTypeMockDB extends UmbEntityMockDbBase<UmbMockDataTypeModel> {
-	tree = new UmbMockEntityTreeManager<UmbMockDataTypeModel>(this, folderTreeItemMapper);
+	tree = new UmbMockEntityTreeManager<UmbMockDataTypeModel>(this, treeItemMapper);
 	folder = new UmbMockEntityFolderManager<UmbMockDataTypeModel>(this, createFolderMockMapper);
 	item = new UmbMockEntityItemManager<UmbMockDataTypeModel>(this, itemResponseMapper);
 	detail = new UmbMockEntityDetailManager<UmbMockDataTypeModel>(this, createDetailMockMapper, detailResponseMapper);
@@ -25,6 +25,17 @@ class UmbDataTypeMockDB extends UmbEntityMockDbBase<UmbMockDataTypeModel> {
 	}
 }
 
+const treeItemMapper = (model: UmbMockDataTypeModel): DataTypeTreeItemResponseModel => {
+	return {
+		name: model.name,
+		hasChildren: model.hasChildren,
+		id: model.id,
+		parent: model.parent,
+		isFolder: model.isFolder,
+		isDeletable: model.isDeletable,
+	};
+};
+
 const createFolderMockMapper = (request: CreateFolderRequestModel): UmbMockDataTypeModel => {
 	return {
 		name: request.name,