diff --git a/test/TEST.ROOT b/test/TEST.ROOT
index 7a285b03a3cd413a7b3f1b3a29a90a74982d2c98..20343794a8a92b1788cfe21c4d112b496681d7bb 100644
--- a/test/TEST.ROOT
+++ b/test/TEST.ROOT
@@ -8,8 +8,11 @@
 # would not count as "randomness" by this definition.) Extra care
 # should be taken to handle test failures of intermittent or
 # randomness tests.
+#
+# A "headful" test requires a graphical environment to meaningfully
+# run. Tests that are not headful are "headless."
 
-keys=2d dnd i18n intermittent randomness
+keys=2d dnd i18n intermittent randomness headful
 
 # Tests that must run in othervm mode
 othervm.dirs=java/awt java/beans java/rmi javax/accessibility javax/imageio javax/sound javax/print javax/management com/sun/awt sun/awt sun/java2d sun/pisces sun/rmi