diff --git a/assets/css/main.scss b/assets/css/main.scss
index 603c6e6c..e79298b3 100644
--- a/assets/css/main.scss
+++ b/assets/css/main.scss
@@ -7,7 +7,7 @@
   $--visited-link-color,
   $--highlight
 ) {
-  background-color: $--bg-color;
+  background-color: #c00000; // TEST ONLY: bogus change to prove PR previews work. Do not merge.
 
   color: $--primary-text-color;