--- old/test/jdk/java/awt/Toolkit/RealSync/Test.java	2018-02-20 07:05:48.000000000 -0800
+++ new/test/jdk/java/awt/Toolkit/RealSync/Test.java	2018-02-20 07:05:48.000000000 -0800
@@ -24,6 +24,7 @@
 /*
   @test
   @bug 6252005
+  @key headful
   @summary Tests that realSync feature works
   @author denis.mikhalkin: area=awt.toolkit
   @modules java.desktop/sun.awt