If you tried to test the safety of cars or children's toys using the same method the European Union applied in its stress tests on banks, you would end up in jail. How so? Simply because the testing mechanism was calibrated to fix the result. The purpose of the exercise was to ensure that the only banks that failed it were those that would have to be restructured anyway.
At the same time, the supposedly clever idea was to demonstrate to the outside world that the rest of the banking system remained sound. The purpose of this cynical exercise was to pretend that the EU was solving a problem, when in fact it was not.
It is too early to judge whether the ploy worked. But from the informed reaction on Friday night, I suspect not. Expectations were not very high. But the EU undershot the lowest of them.