diff --git a/examples/tree_1d_dgsem/elixir_advection_perk2.jl b/examples/tree_1d_dgsem/elixir_advection_perk2.jl
index 66288e7307..ce70c2ddcd 100644
--- a/examples/tree_1d_dgsem/elixir_advection_perk2.jl
+++ b/examples/tree_1d_dgsem/elixir_advection_perk2.jl
@@ -2,7 +2,6 @@
 # Convex and ECOS are imported because they are used for finding the optimal time step and optimal 
 # monomial coefficients in the stability polynomial of PERK time integrators.
 using Convex, ECOS
-
 # We use time integration methods implemented in Trixi.jl, but we need the `CallbackSet`
 using OrdinaryDiffEq: CallbackSet
 using Trixi