The European Central Bank has dismissed the latest appeal by the region’s biggest lenders for concessions, including easier deadlines, to make rigorous health checks of their industry less logistically onerous, sources told Reuters.

ECB officials indicated to representatives of the European Banking Federation, an industry lobby group, that they would not alter the timetable of this year’s “asset quality review”, two sources familiar with a meeting between the two sides said.

The meeting, held in Frankfurt on Tuesday, marked the latest attempt by eurozone banks to get changes to the ECB exercise which will feed into stress tests across the European Union to ensure that lenders could survive a future crisis without needing taxpayer-funded bailouts.

“There was nothing new from the ECB on the ... process at (the) meeting and no indication of flexibility on timelines,” one source familiar with the discussions told Reuters.

The ECB declined to comment while a Brussels-based spokesman for the EBF, which represents national banking associations from across Europe, said it did not comment on specific meetings.

Bankers do not want to water down the review of whether the eurozone’s 128 largest lenders have properly valued their assets, but need more time.

The ECB has repeatedly insisted there will be no slippage from its plan to complete the review by October, which would ensure any skeletons in the closet are dealt with before it takes over as the eurozone’s bank supervisor in November.

A 285-page manual setting out how assets will be examined was published on March 11. Banks say the reporting, which can run to more than 100 fields per loan file, are too onerous.