diff a/test/langtools/tools/javac/reflect/TestUnsupported.out b/test/langtools/tools/javac/reflect/TestUnsupported.out
--- /dev/null
+++ b/test/langtools/tools/javac/reflect/TestUnsupported.out
@@ -0,0 +1,4 @@
+TestUnsupported.java:11:13: compiler.warn.reflectable.method.unsupported: TestUnsupported, jdk.incubator.code.internal.ReflectMethods$UnsupportedASTException:case null, default -> yield true;
+- compiler.err.warnings.and.werror
+1 error
+1 warning