diff --git a/sample/index.html b/sample/index.html
index 8ef5e677a..95584fc21 100644
--- a/sample/index.html
+++ b/sample/index.html
@@ -38,6 +38,24 @@
Math
inserts mathematical formulas into the editor. You can click the CKEditor 5 Math icon in the toolbar and see the results.
+ +
+ ++ +
+ ++ This should show "\test" as ≠ via katexRenderOptions.macros: + +
+ + ++ +
+