--- a/test/lib/sun/hotspot/gc/GC.java	Tue Jun 12 07:52:30 2018 -0700
+++ b/test/lib/sun/hotspot/gc/GC.java	Tue Jun 12 17:40:28 2018 +0200
@@ -37,7 +37,8 @@
     Parallel(2),
     ConcMarkSweep(3),
     G1(4),
-    Epsilon(5);
+    Epsilon(5),
+    Z(6);
 
     private static final WhiteBox WB = WhiteBox.getWhiteBox();