Bolometric light curve (black squares and solid line) of SN 2019zrk, together with the r- (red) and g-band (green) photometry. The magenta stars show the pseudo-bolometric magnitudes from our spectra, while the dashed line shows the expected late light curve from ⁵⁶Co decay, corresponding to a ⁵⁶Ni mass of 0.09 M_⊙ and full trapping in the nebular stage. The dotted, black line shows an exponential fit to the luminosity (see text).