--- a/test/hotspot/jtreg/gc/arguments/TestDisableDefaultGC.java	Tue Jun 12 07:52:30 2018 -0700
+++ b/test/hotspot/jtreg/gc/arguments/TestDisableDefaultGC.java	Tue Jun 12 17:40:28 2018 +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");