diff --git a/about.md b/about.md
index 8a51a60..b92b7c6 100644
--- a/about.md
+++ b/about.md
@@ -3,6 +3,8 @@ layout: page
 title: About
 ---
 
+[broken-link-test](https://www.this-should-not-exist-i3ryt8.org/)
+
 ## What is the ESMValTool?
 
 ![ESMValTool-logo](/assets/img/EVA-logo.png){:style="float: left;margin-right: 16px;margin-top: 16px;"}