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..82cad4be5 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
@@ -65,7 +65,7 @@
     "import xarray as xr\n",
     "\n",
     "from glotaran.io.interface import DataIoInterface\n",
-    "from glotaran.plugin_system.data_io_registration import register_data_io"
+    "from glotaran.plugin_system.simulated_data.data_io_registration import register_data_io"
    ]
   },
   {
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"
    ]