You can further simplify this actually (and make it explicit why the comment is there with a message):

```ruby
    # To generate the valid message below:
    #
    #   AutoloadClass = Struct.new(:foo)
    #   valid_message = @verifier.generate(foo: AutoloadClass.new('foo'))
    #
    valid_message = "BAh7BjoIZm9vUzoSQXV0b2xvYWRDbGFzcwY7AEkiCGZvbwY6BkVU--13f03643d3d6879a6269d59ed7a027b6d6ad22a9"
```