--- old/test/hotspot/jtreg/gc/TestNumWorkerOutput.java	2019-03-19 17:31:55.620259742 +0800
+++ new/test/hotspot/jtreg/gc/TestNumWorkerOutput.java	2019-03-19 17:31:55.512259742 +0800
@@ -28,7 +28,7 @@
  * @bug 8165292
  * @summary Check that when PrintGCDetails is enabled, gc,task output is printed only once per collection.
  * @key gc
- * @requires vm.gc=="null"
+ * @requires vm.gc.G1
  * @modules java.base/jdk.internal.misc
  * @library /test/lib
  * @build sun.hotspot.WhiteBox
@@ -40,6 +40,7 @@
  * @test TestNumWorkerOutputCMS
  * @bug 8165292
  * @key gc
+ * @requires vm.gc.ConcMarkSweep
  * @comment Graal does not support CMS
  * @requires vm.gc=="null" & !vm.graal.enabled
  * @modules java.base/jdk.internal.misc