diff -r 6e7e363c5a8f -r 595c0f60d50d test/gc/g1/TestGCLogMessages.java
--- a/test/gc/g1/TestGCLogMessages.java	Mon Mar 24 09:14:14 2014 -0700
+++ b/test/gc/g1/TestGCLogMessages.java	Tue Mar 18 19:07:22 2014 +0100
@@ -49,11 +49,13 @@
 
     output.shouldNotContain("[Redirty Cards");
     output.shouldNotContain("[Code Root Purge");
+    output.shouldNotContain("[String Dedup Fixup");
     output.shouldNotContain("[Young Free CSet");
     output.shouldNotContain("[Non-Young Free CSet");
     output.shouldHaveExitValue(0);
 
     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
+                                               "-XX:+UseStringDeduplication",
                                                "-Xmx10M",
                                                "-XX:+PrintGCDetails",
                                                GCTest.class.getName());
@@ -62,11 +64,13 @@
 
     output.shouldContain("[Redirty Cards");
     output.shouldContain("[Code Root Purge");
+    output.shouldContain("[String Dedup Fixup");
     output.shouldNotContain("[Young Free CSet");
     output.shouldNotContain("[Non-Young Free CSet");
     output.shouldHaveExitValue(0);
 
     pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
+                                               "-XX:+UseStringDeduplication",
                                                "-Xmx10M",
                                                "-XX:+PrintGCDetails",
                                                "-XX:+UnlockExperimentalVMOptions",
@@ -77,6 +81,7 @@
 
     output.shouldContain("[Redirty Cards");
     output.shouldContain("[Code Root Purge");
+    output.shouldContain("[String Dedup Fixup");
     output.shouldContain("[Young Free CSet");
     output.shouldContain("[Non-Young Free CSet");