diff --git a/advanced/apply_ufunc/numba-vectorization.ipynb b/advanced/apply_ufunc/numba-vectorization.ipynb
index 32150b9b..a77166c0 100644
--- a/advanced/apply_ufunc/numba-vectorization.ipynb
+++ b/advanced/apply_ufunc/numba-vectorization.ipynb
@@ -150,7 +150,9 @@
    "execution_count": null,
    "id": "138e692e-36bf-45ca-8131-feeb1c1b41c4",
    "metadata": {
-    "tags": []
+    "tags": [
+     "raises-exception"
+    ]
    },
    "outputs": [],
    "source": [
diff --git a/advanced/apply_ufunc/simple_numpy_apply_ufunc.ipynb b/advanced/apply_ufunc/simple_numpy_apply_ufunc.ipynb
index 5691d729..c551ad50 100644
--- a/advanced/apply_ufunc/simple_numpy_apply_ufunc.ipynb
+++ b/advanced/apply_ufunc/simple_numpy_apply_ufunc.ipynb
@@ -601,7 +601,6 @@
    },
    "source": [
     "```{tip} Exercise\n",
-    ":label: trapz\n",
     "\n",
     "Use `apply_ufunc` to apply `scipy.integrate.trapz` along the `time` axis.\n",
     "```\n",