diff --git a/docs/gallery/nyc-taxi.ipynb b/docs/gallery/nyc-taxi.ipynb
index 10b31115..6e73e0f9 100644
--- a/docs/gallery/nyc-taxi.ipynb
+++ b/docs/gallery/nyc-taxi.ipynb
@@ -35,7 +35,7 @@
     "from scipp.scipy.ndimage import gaussian_filter\n",
     "import ipywidgets as ipw\n",
     "\n",
-    "data = sc.io.open_hdf5(examples.nyc_taxi())\n",
+    "data = sc.io.load_hdf5(examples.nyc_taxi())\n",
     "data"
    ]
   },
diff --git a/src/plopp/data/factory.py b/src/plopp/data/factory.py
index 37867ebf..a7faa87f 100644
--- a/src/plopp/data/factory.py
+++ b/src/plopp/data/factory.py
@@ -152,10 +152,9 @@ def dataset(entries: List[str] = None, **kwargs) -> sc.Dataset:
     """
     if entries is None:
         entries = ['a', 'b']
-    ds = sc.Dataset()
-    for entry in entries:
-        ds[entry] = (10.0 * np.random.random()) * data_array(**kwargs)
-    return ds
+    return sc.Dataset(
+        {entry: (10.0 * np.random.random()) * data_array(**kwargs) for entry in entries}
+    )
 
 
 def scatter(npoints=500, scale=10.0, seed=1) -> sc.DataArray: