--- old/test/hotspot/jtreg/runtime/CommandLine/OptionsValidation/common/optionsvalidation/JVMOptionsUtils.java	2017-11-06 09:45:34.517608958 +0100
+++ new/test/hotspot/jtreg/runtime/CommandLine/OptionsValidation/common/optionsvalidation/JVMOptionsUtils.java	2017-11-06 09:45:34.285608966 +0100
@@ -216,6 +216,9 @@
             case "CMSPrecleanDenominator":
                 option.addPrepend("-XX:CMSPrecleanNumerator=" + ((new Integer(option.getMin())) - 1));
                 break;
+            case "G1RefProcDrainInterval":
+                option.addPrepend("-XX:+ExplicitGCInvokesConcurrent");
+                break;
             case "InitialTenuringThreshold":
                 option.addPrepend("-XX:MaxTenuringThreshold=" + option.getMax());
                 break;