I'm working on a little library package (purely for my own consumption) that's built with Cabal, and I have a couple of questions about the pragmatics of using HUnit for it. First, I'd like to be able to run my tests via "cabal test" from the shell prompt. I've seen http://hackage.haskell.org/trac/hackage/wiki/UpgradingTests and followed that, and it basically works. I'm curious if I'm doing it in the best (or at least most idiomatic) way. I've included my cabal file and test driver below, for specifics. Two questions: First: the web page I cite above describes the interface that the test binary must support to work with cabal, specifically w.r.t. the binary's exit code. "Your test suites likely already fit this model. However, if you are using an old version of QuickCheck or HUnit, your executable may not be returning the correct error code." This seems to me to suggest that recent versions of HUnit automatically take care of generating the exit code, but I've found that I have to examine HUnit's results and synthesize the exit code manually, as in the driver program below. (I'm running HUnit 1.2.4.2, but the interface for 1.2.4.3 doesn't appear to differ on this point.) Am I misinterpreting the wiki page, or am I missing something in HUnit's API that generates the exit code automatically? Second: Am I specifying the Build-Depends correctly for the Test-Suite? Specifically: do I need to state a dependency on the library defined in the same package, or does it pick that up automatically? Further, foo-tests doesn't use parsec directly. Is the transitive dependency automatically provided for me, or do I need to list it explicitly as below? Thanks much, Richard My cabal file: Name: foo Version: 0.0 Cabal-Version: >= 1.2 Author: Richard Cobbe Synopsis: Sample cabal package for HUnit integration Build-Type: Simple Library Exposed-Modules: Foo, Foo.Parser, Foo.Show Build-Depends: base >= 4.3.1.0 && < 5, parsec >= 3.1.2 Test-Suite foo-tests main-is: foo-tests.hs type: exitcode-stdio-1.0 Build-Depends: base >= 4.3.1.0 && < 5, parsec >= 3.1.2, HUnit >= 1.2.4.2 and foo-tests.hs: module Main where import Test.HUnit import qualified Foo.Parser import System.Exit main :: IO () main = do c <- runTestTT ("Foo" ~: Foo.Parser.tests) if (errors c == 0 && failures c == 0) then exitWith ExitSuccess else exitWith (ExitFailure (-1))