I've used nearly a year old tube (it was a couple months outdated and sat in my fridge for another 6 months or so) myself with no problems...The biggest thing besides applying the puke test with using outdated yeast is to Plan enough time to incrementally build up a huge starter.
Just like we can build up a starter by harvesting a scant few cells out of a bottle, outdated yeast can be used, because you will reproduce the healthy still alive cells.
My lhbs sells outdated tubes and smack packs dirt cheap....
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If you're concerned about it's viability, just culture the yeast through a few starters and washes until you're ready to use it. But I don't think it's needed, as has been said, just make a started and you'll be good to go.