diff --git a/docs/julia/heater_3d.jl b/docs/julia/heater_3d.jl
index a2ea6959..00d406b4 100644
--- a/docs/julia/heater_3d.jl
+++ b/docs/julia/heater_3d.jl
@@ -17,7 +17,7 @@
 # %% [markdown]
 # # 3D thermal phase shifter
 
-# %%
+# %% tags=["remove-stderr"]
 using CairoMakie
 
 using Gridap