--- a/hotspot/test/runtime/CommandLine/OptionsValidation/common/optionsvalidation/DoubleJVMOption.java	Wed Jun 24 18:19:09 2015 -0400
+++ b/hotspot/test/runtime/CommandLine/OptionsValidation/common/optionsvalidation/DoubleJVMOption.java	Wed Jun 24 18:21:14 2015 -0400
@@ -25,6 +25,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 
 public class DoubleJVMOption extends JVMOption {
 
@@ -109,7 +110,7 @@
     }
 
     private String formatValue(double value) {
-        return String.format("%f", value);
+        return String.format(Locale.US, "%f", value);
     }
 
     /**