European bankers, regulators and government officials Tuesday will take part in a cyber-war games run-through, according to reports. The test, which is being hosted in London, is being called "Waking Shark II."

It's designed to test the mettle of their defenses in the face of a range of different attacks, according to Reuters. In one instance, British newspaper The Independent explains, banks will be put through scenarios that might require their ATMs be filled with cash.

The overseas simulation comes on the heels of a similarly staged assault in the U.S.

In July, the Securities Industry and Financial Markets Association conducted the so-called "Quantum Dawn 2" test to prove the crisis response and communications plans of some of Wall Street's biggest banks.

At the time, more than 500 people from 50 different financial services companies and government agencies participated.