def METHOD_NAME(self):
    # Slice src so result collapses to a scalar.
    src_cube = self.src_cube[:, 1, :]
    # Regrid to a single cell with no overlap with masked src cells.
    grid_cube = self.grid_cube[2, 1, 3]
    res = regrid(src_cube, grid_cube, mdtol=0.8)
    self.assertFalse(ma.isMaskedArray(res.data))