Hi, I just uploaded a new version of Doctest that adds support for ghc-7.4. http://hackage.haskell.org/package/doctest Doctest now comes with it's own parser and does not depend on Haddock anymore. This is a quite involved change, and it may still have issues. So pleases test, and do not be shy in reporting any bugs (either as a reply to this post or on [1]). Cheers, Simon [1] https://github.com/sol/doctest-haskell/issues