--- old/test/hotspot/jtreg/gc/arguments/TestDisableDefaultGC.java	2018-06-06 00:36:21.333383711 +0200
+++ new/test/hotspot/jtreg/gc/arguments/TestDisableDefaultGC.java	2018-06-06 00:36:21.076372644 +0200
@@ -43,6 +43,8 @@
                                                                   "-XX:-UseParallelGC",
                                                                   "-XX:-UseG1GC",
                                                                   "-XX:-UseConcMarkSweepGC",
+                                                                  "-XX:+UnlockExperimentalVMOptions",
+                                                                  "-XX:-UseZGC",
                                                                   "-version");
         OutputAnalyzer output = new OutputAnalyzer(pb.start());
         output.shouldMatch("Garbage collector not selected");