When you have a limited amount of nuclear material, it is perfectly reasonable to run the "tests" in a combat environment. What do you have to lose? If it fails to go boom, it would have done so in the test environment too. If it does go boom, mission accomplished.
I suspect Saddam's definition of a "combat environment" will be somewhere in Israel or a major U.S. city. He won't do it personally. He will let his Al Qaida buddies attend to that task while he watches the homefront.