"Sen. Mark Warner, D-VA, introduced legislation Thursday seeking to require banks to engage in periodic test borrowing at the Federal Reserve's discount window.

The bill would also require regulators evaluating banks' liquidity preparedness to give lenders credit if they can successfully use the window. The discount window is the Fed's short-term lending facility designed to help banks facing a liquidity crunch.

The bill also outlined ways the Fed needs to modernize discount window operations, including by extending available hours, according to a summary of the legislation shared with Banking Dive."