--- old/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions.java	2018-08-08 12:09:20.437210800 -0700
+++ new/test/hotspot/jtreg/runtime/appcds/sharedStrings/IncompatibleOptions.java	2018-08-08 12:09:20.071176223 -0700
@@ -119,6 +119,7 @@
             "-XX:+UseCompressedOops",
             collectorOption,
             "-XX:SharedArchiveConfigFile=" + TestCommon.getSourceFile("SharedStringsBasic.txt"),
+            "-Xlog:cds,cds+hashtables",
             extraOption);
 
         if (expectedWarning != null)