test/langtools/tools/javac/switchexpr/SwitchExpressionSimpleVisitorTest.java

*** 87,97 ****
          assert tool != null;
          DiagnosticListener<JavaFileObject> noErrors = d -> {};
  
          StringWriter out = new StringWriter();
          JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors,
!             List.of("--enable-preview", "-source", "12"), null,
              Arrays.asList(new MyFileObject(code)));
          return ct.parse().iterator().next();
      }
  
      static class MyFileObject extends SimpleJavaFileObject {
--- 87,97 ----
          assert tool != null;
          DiagnosticListener<JavaFileObject> noErrors = d -> {};
  
          StringWriter out = new StringWriter();
          JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors,
!             List.of("--enable-preview", "-source", "13"), null,
              Arrays.asList(new MyFileObject(code)));
          return ct.parse().iterator().next();
      }
  
      static class MyFileObject extends SimpleJavaFileObject {