diff -r 57a2c6c04966 -r 391d8c7223d1 ui/motif/toolkit.c
--- a/ui/motif/toolkit.c	Sun Feb 02 13:50:38 2025 +0100
+++ b/ui/motif/toolkit.c	Sun Feb 02 13:51:06 2025 +0100
@@ -78,6 +78,8 @@
         "*window_frame.shadowThickness: 1",
         "*togglebutton.shadowThickness: 1",
         "*togglebutton.highlightThickness: 2",
+        
+        "*ui_test.background: red",
 	NULL
 };