{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"check(\"let"}]}
        check("let a: u8;", "let a: ();", Some(make::ty_tuple([])));
        // replacing
        check("let a: u8 = 3;", "let a: () = 3;", Some(make::ty_tuple([])));