--- a/langtools/test/tools/javac/Diagnostics/7010608/Test.java	Wed Jul 05 22:10:57 2017 +0200
+++ b/langtools/test/tools/javac/Diagnostics/7010608/Test.java	Tue Sep 06 17:04:43 2016 -0700
@@ -46,9 +46,9 @@
         try {
             test(Arrays.<String>asList(),
                     "myfo://test:1: error: cannot find symbol");
-            test(Arrays.asList("-diags:layout=OLD"),
+            test(Arrays.asList("--diags:layout=OLD"),
                     "myfo://test:1: cannot find symbol");
-            test(Arrays.asList("-diags:legacy"),
+            test(Arrays.asList("--diags:legacy"),
                     "myfo://test:1: cannot find symbol");
         } finally {
             Locale.setDefault(prev);