Trade groups representing the largest U.S. banks on Tuesday filed suit in federal court to force more transparency in the U.S. Federal Reserve’s bank stress tests imposed after the 2008 global financial crisis,

The Fed on Monday said it planned to overhaul the stress test regime for banks and planned to seek public comment on planned changes.

Some of the nation’s biggest banks and industry groups are suing the Federal Reserve over the annual “stress tests” it uses to determine how much cash banks are required to keep on hand in case of economic turmoil.