--- old/test/langtools/tools/javac/diags/examples/PreviewFilename.java	2018-12-05 13:52:01.392798918 -0800
+++ new/test/langtools/tools/javac/diags/examples/PreviewFilename.java	2018-12-05 13:52:01.200894911 -0800
@@ -23,7 +23,7 @@
 
 // key: compiler.note.preview.filename
 // key: compiler.note.preview.recompile
-// options: -XDforcePreview  -source 12 --enable-preview
+// options: -XDforcePreview  -source 13 --enable-preview
 
 import java.util.ArrayList;
 import java.util.List;