diff --git a/examples/structured_2d_dgsem/elixir_euler_warm_bubble.jl b/examples/structured_2d_dgsem/elixir_euler_warm_bubble.jl
index 0e59111273c..cd1986dcced 100644
--- a/examples/structured_2d_dgsem/elixir_euler_warm_bubble.jl
+++ b/examples/structured_2d_dgsem/elixir_euler_warm_bubble.jl
@@ -172,7 +172,7 @@ background_state = compute_reference_state(hydrostatic_background, semi, cons2pr
 save_solution = SaveSolutionCallback(interval = analysis_interval,
                                      save_initial_solution = true,
                                      save_final_solution = true,
-                                     output_directory = "out_bubble",
+                                     output_directory = "out",
                                      solution_variables = cons2prim,
                                      reference_solution = background_state)
 
diff --git a/src/Trixi.jl b/src/Trixi.jl
index 0cedec782df..5d5d223d5b5 100644
--- a/src/Trixi.jl
+++ b/src/Trixi.jl
@@ -268,6 +268,8 @@ export SummaryCallback, SteadyStateCallback, AnalysisCallback, AliveCallback,
        AnalysisSurfaceIntegral, DragCoefficientPressure, LiftCoefficientPressure,
        DragCoefficientShearStress, LiftCoefficientShearStress
 
+export compute_reference_state
+
 export load_mesh, load_time, load_timestep, load_timestep!, load_dt,
        load_adaptive_time_integrator!