8071811: gc/arguments/TestG1ConcRefinementThreads.java failed on Exception: java.lang.RuntimeException: Actual G1ConcRefinementThreads(0) is not equal to expected value(23)

Reviewed-by: jwilhelm, iignatyev
diff --git a/hotspot/test/TEST.groups b/hotspot/test/TEST.groups
index 6a58000..109866e 100644
--- a/hotspot/test/TEST.groups
+++ b/hotspot/test/TEST.groups
@@ -235,7 +235,8 @@
   gc/metaspace/G1AddMetaspaceDependency.java \
   gc/metaspace/TestMetaspacePerfCounters.java \
   gc/startup_warnings/TestG1.java \
-  gc/whitebox/TestConcMarkCycleWB.java
+  gc/whitebox/TestConcMarkCycleWB.java \
+  gc/arguments/TestG1ConcRefinementThreads.java
 
 # All tests that explicitly set the serial GC
 #