--- old/test/hotspot/jtreg/runtime/appcds/CommandLineFlagCombo.java	2018-10-03 06:08:10.141373899 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/CommandLineFlagCombo.java	2018-10-03 06:08:09.678330542 +0100
@@ -24,7 +24,10 @@
 
 /*
  * @test CommandLineFlagCombo
- * @requires vm.cds
+ * @requires vm.cds.archived.java.heap
+ * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
+ * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
+ * vm options.
  * @requires (vm.gc=="null")
  * @summary Test command line flag combinations that
  *          could likely affect the behaviour of AppCDS
--- old/test/hotspot/jtreg/runtime/appcds/cacheObject/DifferentHeapSizes.java	2018-10-03 06:08:11.056459583 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/cacheObject/DifferentHeapSizes.java	2018-10-03 06:08:10.642420815 +0100
@@ -26,7 +26,6 @@
  * @test
  * @summary Test automatic relocation of archive heap regions dur to heap size changes.
  * @requires vm.cds.archived.java.heap
- * @requires (vm.gc=="null")
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules jdk.jartool/sun.tools.jar
  * @compile ../test-classes/Hello.java
--- old/test/hotspot/jtreg/runtime/appcds/cacheObject/OpenArchiveRegion.java	2018-10-03 06:08:11.901538712 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/cacheObject/OpenArchiveRegion.java	2018-10-03 06:08:11.502501349 +0100
@@ -26,6 +26,9 @@
  * @test
  * @summary Test open archive heap regions
  * @requires vm.cds.archived.java.heap
+ * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
+ * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
+ * vm options.
  * @requires (vm.gc=="null")
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules java.base/jdk.internal.misc
--- old/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions.java	2018-10-03 06:08:12.764619527 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions.java	2018-10-03 06:08:12.358581508 +0100
@@ -27,6 +27,9 @@
  * @summary Test options that are incompatible with use of shared strings
  *          Also test mismatch in oops encoding between dump time and run time
  * @requires vm.cds.archived.java.heap
+ * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
+ * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
+ * vm options.
  * @requires (vm.gc=="null")
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules jdk.jartool/sun.tools.jar
--- old/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions_noCompactStrings.java	2018-10-03 06:08:13.634700998 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions_noCompactStrings.java	2018-10-03 06:08:13.212661480 +0100
@@ -27,6 +27,9 @@
  * @summary Test options that are incompatible with use of shared strings
  *          Also test mismatch in oops encoding between dump time and run time
  * @requires vm.cds.archived.java.heap
+ * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
+ * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
+ * vm options.
  * @requires (vm.gc=="null")
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules jdk.jartool/sun.tools.jar
--- old/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions_stringDedup.java	2018-10-03 06:08:14.472779471 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions_stringDedup.java	2018-10-03 06:08:14.069741733 +0100
@@ -27,6 +27,9 @@
  * @summary Test options that are incompatible with use of shared strings
  *          Also test mismatch in oops encoding between dump time and run time
  * @requires vm.cds.archived.java.heap
+ * @comment This test explicitly chooses the type of GC to be used by sub-processes. It may conflict with the GC type set
+ * via the -vmoptions command line option of JTREG. vm.gc==null will help the test case to discard the explicitly passed
+ * vm options.
  * @requires (vm.gc=="null")
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules jdk.jartool/sun.tools.jar
--- old/test/hotspot/jtreg/runtime/appcds/sharedStrings/SysDictCrash.java	2018-10-03 06:08:15.339860661 +0100
+++ new/test/hotspot/jtreg/runtime/appcds/sharedStrings/SysDictCrash.java	2018-10-03 06:08:14.940823297 +0100
@@ -26,8 +26,7 @@
  * @test
  * @summary Regression test for JDK-8098821
  * @bug 8098821
- * @requires vm.cds
- * @requires vm.gc.G1
+ * @requires vm.cds.archived.java.heap
  * @library /test/lib /test/hotspot/jtreg/runtime/appcds
  * @modules java.base/jdk.internal.misc
  * @modules java.management