--- old/test/hotspot/jtreg/gc/class_unloading/TestClassUnloadingDisabled.java	2019-03-19 17:31:59.644259742 +0800
+++ new/test/hotspot/jtreg/gc/class_unloading/TestClassUnloadingDisabled.java	2019-03-19 17:31:59.536259742 +0800
@@ -30,6 +30,7 @@
  * @requires vm.gc == null
  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  * @requires vm.opt.ClassUnloading != true
+ * @requires vm.gc.Serial & vm.gc.Parallel & vm.gc.G1
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  *          java.management
@@ -53,7 +54,7 @@
  * @key gc
  * @bug 8114823
  * @comment Graal does not support CMS
- * @requires vm.gc=="null" & !vm.graal.enabled
+ * @requires vm.gc.ConcMarkSweep & !vm.graal.enabled
  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  * @requires vm.opt.ClassUnloading != true
  * @library /test/lib