diff --git a/colorchord2/shmtest.conf b/colorchord2/shmtest.conf
index 9d001fc..d18986d 100644
--- a/colorchord2/shmtest.conf
+++ b/colorchord2/shmtest.conf
@@ -1,4 +1,5 @@
 cpu_autolimit = 1
+headless=1
 
 #General GUI properties.
 title = PA Test