test/hotspot/jtreg/gc/arguments/TestDisableDefaultGC.java

*** 41,50 ****
--- 41,52 ----
          // Start VM, disabling all possible default GCs
          ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:-UseSerialGC",
                                                                    "-XX:-UseParallelGC",
                                                                    "-XX:-UseG1GC",
                                                                    "-XX:-UseConcMarkSweepGC",
+                                                                   "-XX:+UnlockExperimentalVMOptions",
+                                                                   "-XX:-UseZGC",
                                                                    "-version");
          OutputAnalyzer output = new OutputAnalyzer(pb.start());
          output.shouldMatch("Garbage collector not selected");
          output.shouldHaveExitValue(1);
      }