diff --git a/16/umbraco-cms/README.md b/16/umbraco-cms/README.md
index f33658787d0..45c5982eb49 100644
--- a/16/umbraco-cms/README.md
+++ b/16/umbraco-cms/README.md
@@ -8,6 +8,13 @@ coverY: 0
 
 Umbraco CMS is a flexible and editor-friendly Content Management System (CMS) that allows you to create beautiful and modern websites. Use the latest version of .NET, integrate with your favorite services, and help your customers launch a website tailored to their specific needs.
 
+Rich testing Mermaid:
+
+```mermaid
+graph TD
+    A-->B
+```
+
 Learn more about Umbraco CMS and get an overview of the top features on [Umbraco.com](https://umbraco.com/products/umbraco-cms/).
 
 <table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Fundamentals</strong></td><td>Learn the basics of working with Umbraco CMS. How to install and setup your first site is also included in this section.</td><td><a href=".gitbook/assets/Documentations Icons_Umbraco_CMS_Fundamentals.png">Documentations Icons_Umbraco_CMS_Fundamentals.png</a></td><td><a href="fundamentals/get-to-know-umbraco.md">get-to-know-umbraco.md</a></td></tr><tr><td><strong>Install Umbraco CMS</strong></td><td>Ready to get started with Umbraco? Head over to the Setup section to learn how to install Umbraco CMS.</td><td><a href=".gitbook/assets/Documentations Icons_Umbraco_CMS_Install.png">Documentations Icons_Umbraco_CMS_Install.png</a></td><td><a href="fundamentals/setup/install/">install</a></td></tr><tr><td><strong>Tutorials</strong></td><td>Find detailed step-by-step guides on everything from building a site from scratch to implementing a custom maintenance page.</td><td><a href=".gitbook/assets/Documentations Icons_Umbraco_CMS_Tutorials.png">Documentations Icons_Umbraco_CMS_Tutorials.png</a></td><td><a href="tutorials/overview.md">overview.md</a></td></tr></tbody></table>