https://github.com/npinto/sekyfsr-gentoo-overlay/blob/master/dev-python/virtualenv/virtualenv-1.7.1.2.ebuild
SRC_URI needs to be changed so that test suite is actually provided.
Will the github link work: https://github.com/pypa/virtualenv/tarball/1.7.1.2 ?
See http://code.google.com/p/gentoo-progress/source/browse/overlays/progress/dev-python/virtualenv/virtualenv-1.7.1.2.ebuild
An ebuild with wrong SRC_URI was committed: *virtualenv-1.7.1.2 (01 Mar 2012) 01 Mar 2012; Dirkjan Ochtman <djc@gentoo.org> +virtualenv-1.7.1.2.ebuild: Version bump to 1.7.1.2.
Fixed it up, thanks for pointing it out.