diff --git a/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl b/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
index 051f4defe54..9a65941eb01 100644
--- a/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
+++ b/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
@@ -41,7 +41,6 @@ heat_bc = Adiabatic((x, t, equations) -> 0.0)
 boundary_condition_lid = BoundaryConditionNavierStokesWall(velocity_bc_lid, heat_bc)
 boundary_condition_cavity = BoundaryConditionNavierStokesWall(velocity_bc_cavity, heat_bc)
 
-# define periodic boundary conditions everywhere
 boundary_conditions = Dict( :x_neg => boundary_condition_slip_wall,
                             :y_neg => boundary_condition_slip_wall,
                             :y_pos => boundary_condition_slip_wall,
diff --git a/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity_amr.jl b/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity_amr.jl
index cf1a8f2518a..e259d45d085 100644
--- a/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity_amr.jl
+++ b/examples/p4est_2d_dgsem/elixir_navierstokes_lid_driven_cavity_amr.jl
@@ -41,7 +41,6 @@ heat_bc = Adiabatic((x, t, equations) -> 0.0)
 boundary_condition_lid = BoundaryConditionNavierStokesWall(velocity_bc_lid, heat_bc)
 boundary_condition_cavity = BoundaryConditionNavierStokesWall(velocity_bc_cavity, heat_bc)
 
-# define periodic boundary conditions everywhere
 boundary_conditions = Dict( :x_neg => boundary_condition_slip_wall,
                             :y_neg => boundary_condition_slip_wall,
                             :y_pos => boundary_condition_slip_wall,
diff --git a/examples/tree_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl b/examples/tree_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
index 3314343ccca..4cdfb0e8d88 100644
--- a/examples/tree_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
+++ b/examples/tree_2d_dgsem/elixir_navierstokes_lid_driven_cavity.jl
@@ -41,7 +41,6 @@ heat_bc = Adiabatic((x, t, equations) -> 0.0)
 boundary_condition_lid = BoundaryConditionNavierStokesWall(velocity_bc_lid, heat_bc)
 boundary_condition_cavity = BoundaryConditionNavierStokesWall(velocity_bc_cavity, heat_bc)
 
-# define periodic boundary conditions everywhere
 boundary_conditions = boundary_condition_slip_wall
 
 boundary_conditions_parabolic = (; x_neg = boundary_condition_cavity,