The cuprate superconductors are very unconventional materials. It is therefore noteworthy when they display fairly conventional properties. For example, it was recently found that for the mercury-based cuprate superconductor, Hg1201, Kohler’s rule is obeyed in the underdoped pseudogap regime . Kohler’s rule is typically obeyed by conventional metals, with Fermi-liquid characteristics, such as a reconstructed Fermi surface and a single, temperature-dependent scattering rate. However, for the normal-state of the Hg1201, where the resistivity is linear in temperature (near optimal doping), Kohler’s rule was found to be violated in magnetic fields of up to 9 T . Here we investigate if Kohler’s rule to test if it is truly violated in the strange metal regime by using magnetic fields up to 31 T.