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All TeV-emitting supernova remnant openParSNRclosePar shells that have been detected so far show strong non-thermal X-ray synchrotron emission comma evidencing the presence of supra-TeV electrons. Here comma we propose to observe the Southern part of the newly identified TeV SNR shell HESS J1534-571 with XMM-Newton in an exploratory 30 ks pointing comma to pin down the X-ray emission from the object. Previous Suzaku pointings on the Northern part of the shell have revealed a surprisingly low level of X-ray synchrotron emission from this part of the object comma which may indicate that HESS J1534-571 differs from the other known TeV SNRs and potentially exhibits hadronic TeV emission. The proposed XMM-Newton observation will scrutinize this result before strong conclusions can be drawn.