--- old/test/TEST.ROOT	2020-07-05 23:44:03.093107277 +0100
+++ new/test/TEST.ROOT	2020-07-05 23:44:02.955106381 +0100
@@ -10,9 +10,11 @@
 # randomness tests.
 #
 # A "headful" test requires a graphical environment to meaningfully
-# run. Tests that are not headful are "headless."
+# run. Tests that are not headful are "headless".
+# A test flagged with key "printer" requires a printer to succeed, else
+# throws a PrinterException or the like.
 
-keys=2d dnd i18n intermittent randomness headful jfr
+keys=2d dnd headful i18n jfr intermittent printer randomness
 
 # 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