On Tue, Nov 29, 2016 at 09:36:55PM +0100, Johannes Schindelin wrote: > So the suggestion by both you and Peff, to use an environment variable, > which is either global, or requires the user to set it manually per > session, is simply not a good idea at all. No, my suggestion was to use config and have the test suite use an environment variable to test both cases (preferably automatically, without the user having to do anything). I do not see how that fails to cover all of your use cases. -Peff