diff --git a/main.tex b/main.tex
index 162262b..d5852f9 100644
--- a/main.tex
+++ b/main.tex
@@ -17,6 +17,7 @@
 For errata and more stuff, see \url{https://sarielhp.org/book/}
 
 % Note that unless specifically stated, we always consider the RAM model.
+% test act runner fonts
 
 \section{Grid}
 \begin{exercise}\label{ex1.1}