diff --git a/examples/tree_2d_dgsem/elixir_mhdmultiion_ec.jl b/examples/tree_2d_dgsem/elixir_mhdmultiion_ec.jl
index b5a87e42aa..907ac5d963 100644
--- a/examples/tree_2d_dgsem/elixir_mhdmultiion_ec.jl
+++ b/examples/tree_2d_dgsem/elixir_mhdmultiion_ec.jl
@@ -4,7 +4,6 @@ using Trixi
 
 ###############################################################################
 # semidiscretization of the ideal multi-ion MHD equations
-# TODO: remove un-needed parameters and add test for collisions
 equations = IdealGlmMhdMultiIonEquations2D(gammas = (1.4, 1.667),
                                            charge_to_mass = (1.0, 2.0))
 
diff --git a/src/equations/ideal_glm_mhd_multiion_2d.jl b/src/equations/ideal_glm_mhd_multiion_2d.jl
index faa02f2cfe..fc45e91695 100644
--- a/src/equations/ideal_glm_mhd_multiion_2d.jl
+++ b/src/equations/ideal_glm_mhd_multiion_2d.jl
@@ -84,7 +84,6 @@ mutable struct IdealGlmMhdMultiIonEquations2D{NVARS, NCOMP, RealT <: Real,
     end
 end
 
-# TODO: Add default values
 function IdealGlmMhdMultiIonEquations2D(; gammas, charge_to_mass,
                                         gas_constants = zero(SVector{length(gammas),
                                                                      eltype(gammas)}),