The Luxembourg Commission de Surveillance du Secteur Financier (CSSF) has made a new “Management of MMF reports” procedure available for testing on its eDesk PREPROD platform as it prepares to change the transmission method for money market fund (MMF) reporting from 1 September 2025. The testing environment has been available since 1 July 2025 and supports two collection methods. The CSSF has also updated the related user guide on its website and reiterated that the eDesk PREPROD platform is intended to let professionals test procedures in a dedicated environment. The revised MMF reporting transmission methods are set to apply from 1 September 2025, as previously announced in the CSSF’s 16 April 2025 communiqué.