--- old/langtools/test/tools/javac/modules/DuplicateClassTest.java	2016-08-08 16:39:40.000000000 -0700
+++ new/langtools/test/tools/javac/modules/DuplicateClassTest.java	2016-08-08 16:39:40.000000000 -0700
@@ -60,7 +60,7 @@
         Files.createDirectories(classes);
 
         String log = new JavacTask(tb)
-                .options("-modulesourcepath", base.toString())
+                .options("--module-source-path", base.toString())
                 .outdir(classes)
                 .files(findJavaFiles(base))
                 .run()