Thus, when we test, if we test in the future, Unkil won't be surprised and will have okayed it, like it okays Israel's bombing runs once in a while.
There is an entirely different possibility.
It may be the US that tests. Let me just put it this way: "Like the Lizard tested".
When Kimball

and

about "179 countries" blah-blah, he conveniently ignores the fact that his own country, the US, outright rejected the CTBT, has unilaterally withdrawn from the ABM treaty, and is effectively withdrawing from the SALT and the START, and anyway, SALT and START don't deal with TNW.
So now, re: CTBT, India and US are only different in that US signed by rejected in its Senate, and India has not signed, so has not rejected in its Parliament. BOTH are on "voluntary moratorium". BOTH may decide that the Sovereign National Interest compels a test series in view of altered security imperatives.
Now consider
WHY the US has not ratified CTBT - it's because the "test now!" lobby in the US is faaaar more powerful than their brothers in India, and are kept down only by feeding them huge amounts of $$ for National Ignition Facility, National TerraFLOP Computer Facility, NMD etc. etc. All without live testing of nukes. The price paid for not testing is that the $$ spent on nuke weapon DEVELOPMENT EXCEEDS the peak levels during the Cold War. (source: Scientific American, a couple of years back).
One should carefully listen to presentations by top US DOE types to understand how close they are to actually doing live tests - they make such great contortions to deny that they are preparing to do one that it is clear that they don't expect the listeners to believe them.
Do your own extrapolation and see where this is leading. They NEED to test at some time. So does India. And the POTUS can decide that both are OK for continued US-India strategic partnership.
If the Lizard does what we expect it to do sooner or later (a "surreptitious" test series with TSP and NoKo), or if Russia decides that it's time to do some fireworks, I think that will be used as the excuse.
BTW, what exactly is Kimball's burr in the musharraf? Chinese funding? It has to be...
Added later...
The US official security policy as it stands now envisages PRE-EMPTIVE strikes against terrorist s and anyone who shelters them. It also envisages the use of WMD in those pre-emptive strikes. Put those together, and you see why the US will test small, high-precision weapons probably sooner than later. These are the same "solutions" that India needs.
Big nukes are for a different time, different war, different adversary. So having 10,000 megaton weapons is no good if a terrorist cell in some country is found, and needs to be taken out right away. Or as response to a blast on, say, a military base that kills 1000 soldiers and relatives.
What is needed then is a set of precision weapons, that ensure total wipeout of some 30 different targets in some distant place with no warning and say 30 minutes total response time, while minimizing the fallout radius. You bet the US can and will justify this as a PeaceKeeper or MercyMission.
AS the old saying goes:
Give Peace A Chance... Reconstruct Pakistan