From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Craven <david@craven.ch>
Subject: Re: [PATCH 03/16] gnu: Add python-promise.
Date: Sun, 11 Sep 2016 21:41:10 +0200
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References: <20160911185857.2123-1-efraim@flashner.co.il>
	<20160911185857.2123-4-efraim@flashner.co.il>
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To: Efraim Flashner <efraim@flashner.co.il>
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> +(define-public python2-promise
> +  (let ((promise (package-with-python2
> +                   (strip-python2-variant python-promise))))
> +    (package (inherit promise)
> +      (arguments (substitute-keyword-arguments (package-arguments promise)
> +                   ((#:tests? _) #t)))

I've seen this in a few of your patches. Why do tests fail with python
but not with python-2?