diff --git a/python/demos/demo_stokes_nest.py b/python/demos/demo_stokes_nest.py
index b4fbde6..010950f 100644
--- a/python/demos/demo_stokes_nest.py
+++ b/python/demos/demo_stokes_nest.py
@@ -362,4 +362,4 @@ def T(u: Expr, p: Expr, mu: Expr):
 Uh.destroy()
 ksp.destroy()
 # -------------------- List timings --------------------------
-dolfinx.common.list_timings(MPI.COMM_WORLD])
+dolfinx.common.list_timings(MPI.COMM_WORLD)