diff --git a/examples/seismic/tutorials/05_staggered_acoustic.ipynb b/examples/seismic/tutorials/05_staggered_acoustic.ipynb
index 0e905f3bda..26250c955c 100644
--- a/examples/seismic/tutorials/05_staggered_acoustic.ipynb
+++ b/examples/seismic/tutorials/05_staggered_acoustic.ipynb
@@ -364,8 +364,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "norm_p = norm(p)\n",
-    "assert np.isclose(norm_p, .35098, atol=1e-4, rtol=0)"
+    "norm_p = norm(p4)\n",
+    "assert np.isclose(norm_p, .33736, atol=1e-4, rtol=0)"
    ]
   }
  ],