diff --git a/docs/source/notebooks/plugin_system/plugin_howto_write_a_io_plugin.ipynb b/docs/source/notebooks/plugin_system/plugin_howto_write_a_io_plugin.ipynb
index 63a124b84..9ddcfaa6e 100644
--- a/docs/source/notebooks/plugin_system/plugin_howto_write_a_io_plugin.ipynb
+++ b/docs/source/notebooks/plugin_system/plugin_howto_write_a_io_plugin.ipynb
@@ -169,7 +169,7 @@
    "source": [
     "from glotaran.io import load_dataset\n",
     "from glotaran.io import save_dataset\n",
-    "from glotaran.testing.sequential_spectral_decay import DATASET as dataset"
+    "from glotaran.testing.simulated_data.sequential_spectral_decay import DATASET as dataset"
    ]
   },
   {
diff --git a/docs/source/notebooks/quickstart/quickstart.ipynb b/docs/source/notebooks/quickstart/quickstart.ipynb
index dd13e1da0..22a1fc5f6 100644
--- a/docs/source/notebooks/quickstart/quickstart.ipynb
+++ b/docs/source/notebooks/quickstart/quickstart.ipynb
@@ -54,7 +54,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from glotaran.testing.sequential_spectral_decay import DATASET as dataset\n",
+    "from glotaran.testing.simulated_data.sequential_spectral_decay import DATASET as dataset\n",
     "\n",
     "dataset"
    ]