Convergence test for the COLASolver simulation setup for the screened boost between a f(R) gravity simulation with |f_R0| = 10⁻⁵ and M_ν = 0.2 eV, and a ΛCDM simulation with massless neutrinos, at z = 0.0. This ratio is denoted r, and is shown in comparison to a fiducial simulation setup. The fiducial setup is the same as the test setup in Table 1, namely N_time = 30, N_grid = N_part = 640, and L_box = 350 h⁻¹ Mpc. Here, N_time denotes the number of time steps. The only parameter changed from the test setup to the final setup is N_grid, which was increased to N_grid = 786 due to the resolution on non-linear scales.