--- a/test/jtreg-ext/requires/VMProps.java	Tue Oct 08 15:27:13 2019 -0700
+++ b/test/jtreg-ext/requires/VMProps.java	Wed Oct 09 08:09:12 2019 +0200
@@ -305,6 +305,7 @@
      */
     protected void vmOptFinalFlags(SafeMap map) {
         vmOptFinalFlag(map, "ClassUnloading");
+        vmOptFinalFlag(map, "ClassUnloadingWithConcurrentMark");
         vmOptFinalFlag(map, "UseCompressedOops");
         vmOptFinalFlag(map, "EnableJVMCI");
         vmOptFinalFlag(map, "EliminateAllocations");