test/hotspot/jtreg/vmTestbase/nsk/jdwp/VirtualMachine/InstanceCounts/instanceCounts001/instanceCounts001.java

@@ -163,14 +163,14 @@
         pipe.println(instanceCounts001a.COMMAND_CREATE_TEST_INSTANCES);
 
         if (!isDebuggeeReady())
             return;
 
-        // Note!
-        // Test broken - assumes that no GC is run before heap walk.
-        // G1 fails, just like ZGC, if en explicitly GC is done here.
-        // forceGC();
+        // Note! This test is broken, in the sense that it incorrectly assumes
+        // that no GC can happen before it walks the heap. In practice, it seems
+        // to only affect this test when using ZGC. However, this test will also
+        // fail when using other GCs if an explicit GC is done here.
 
         int expectedCount = instanceCounts001a.expectedCount;
 
         String classNames[];