diff --git a/.prettierignore b/.prettierignore
index fb3626626cb9..58c2d1e722bd 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -2,3 +2,4 @@
 **/*.min.js
 assets/css/main.scss
 assets/plotly/demo.html
+lighthouse_results/**