--- old/test/langtools/tools/javac/diags/examples/SwitchRules.java	2018-12-05 13:52:09.932527227 -0800
+++ new/test/langtools/tools/javac/diags/examples/SwitchRules.java	2018-12-05 13:52:09.744621221 -0800
@@ -23,7 +23,7 @@
 
 // key: compiler.misc.feature.switch.rules
 // key: compiler.warn.preview.feature.use.plural
-// options: --enable-preview -source 12 -Xlint:preview
+// options: --enable-preview -source 13 -Xlint:preview
 
 class SwitchExpressions {
     void m(int i) {