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The RISER project aims to build accelerator and microserver systems based on RISC-V SoCs from ongoing European projects funded by the EuroHPC JU. Working with experimental hardware platforms requires substantial effort on verification and bring-up, including bare-metal tests aimed at the core, memory, and platform levels. Booting a full-blown Linux distribution greatly expands test coverage butalso complexity. We recommend starting with a bare-minimum kernel configuration, without networking and storage functions, and even opting for a no-MMU system configuration, to progressively expand test coverage. In this talk, we outline the features and limitations of no-MMU and summarize our practical experience in early-stage verification of RISC-V prototype platforms.