--- old/test/langtools/tools/javac/parser/JavacParserTest.java	2018-12-05 13:52:12.523231321 -0800
+++ new/test/langtools/tools/javac/parser/JavacParserTest.java	2018-12-05 13:52:12.335325314 -0800
@@ -1096,7 +1096,7 @@
         String expectedErrors = "Test.java:1:178: compiler.err.switch.case.unexpected.statement\n";
         StringWriter out = new StringWriter();
         JavacTaskImpl ct = (JavacTaskImpl) tool.getTask(out, fm, null,
-                Arrays.asList("-XDrawDiagnostics", "--enable-preview", "-source", "12"),
+                Arrays.asList("-XDrawDiagnostics", "--enable-preview", "-source", "13"),
                 null, Arrays.asList(new MyFileObject(code)));
 
         CompilationUnitTree cut = ct.parse().iterator().next();