No problem, while we are on that hash I was thinking: Should the integers be switched for the corresponding [Logger constant](https://github.com/ruby/ruby/blob/trunk/lib/logger.rb#L220)? The digit used already matches so I guess this would be more for clarity - something like:

```ruby
LOG_LEVELS = {
  :debug => ::Logger::DEBUG,
  :info  => ::Logger::INFO,
  :warn  => ::Logger::WARN,
  :error => ::Logger::ERROR
}
```