--- old/test/hotspot/jtreg/runtime/SharedArchiveFile/CdsDifferentCompactStrings.java	2018-08-10 13:37:52.079259288 -0700
+++ new/test/hotspot/jtreg/runtime/SharedArchiveFile/CdsDifferentCompactStrings.java	2018-08-10 13:37:51.963259291 -0700
@@ -50,10 +50,10 @@
         CDSTestUtils.checkDump(out);
 
         out = CDSTestUtils.runWithArchive(loadCompactStringsArgument);
-        if (!CDSTestUtils.isUnableToMap(out)) {
-            out.shouldMatch("The shared archive file's CompactStrings " +
-                "setting .* does not equal the current CompactStrings setting")
-                .shouldHaveExitValue(1);
-        }
+        CDSTestUtils.checkMappingFailure(out);
+
+        out.shouldMatch("The shared archive file's CompactStrings " +
+                        "setting .* does not equal the current CompactStrings setting")
+            .shouldHaveExitValue(1);
     }
 }