--- old/test/hotspot/jtreg/gc/arguments/TestMaxMinHeapFreeRatioFlags.java	2018-06-01 23:13:12.526283154 +0200
+++ new/test/hotspot/jtreg/gc/arguments/TestMaxMinHeapFreeRatioFlags.java	2018-06-01 23:13:12.267272104 +0200
@@ -25,6 +25,7 @@
  * @test TestMaxMinHeapFreeRatioFlags
  * @key gc
  * @summary Verify that heap size changes according to max and min heap free ratios.
+ * @requires vm.gc != "Z"
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  *          java.management