I'm testing a Sinatra app with several of the usual suspects (rspec, rack/test). From time to time during development, an error within the application will cause Sinatra to generate an error response page. This page is a gorgeous bit of HTML and would be quite nice to use if I was interacting with it in the browser, however, in the text-based testrunner world, it's actually rather difficult to read.
Is there a good way to configure Sinatra such that it will give me these errors in plain text when I run it in a unit/integration-testing environment?