diff --git a/notebooks/abundance-analysis.ipynb b/notebooks/abundance-analysis.ipynb
index 35a086f..1f720e5 100644
--- a/notebooks/abundance-analysis.ipynb
+++ b/notebooks/abundance-analysis.ipynb
@@ -33,9 +33,10 @@
    "outputs": [],
    "source": [
     "import pathlib\n",
-    "import sys\n",
+    "\n",
     "import pandas as pd\n",
-    "from cev.widgets import Embedding, EmbeddingComparisonWidget, compare\n",
+    "\n",
+    "from cev.widgets import Embedding, EmbeddingComparisonWidget\n",
     "\n",
     "\n",
     "def get_embedding(folder: str, sample: str):\n",
diff --git a/notebooks/getting-started.ipynb b/notebooks/getting-started.ipynb
index 3ff1781..8aa167c 100644
--- a/notebooks/getting-started.ipynb
+++ b/notebooks/getting-started.ipynb
@@ -22,6 +22,7 @@
    "outputs": [],
    "source": [
     "import pandas as pd\n",
+    "\n",
     "from cev.widgets import Embedding, EmbeddingComparisonWidget"
    ]
   },
diff --git a/notebooks/lui-2021.ipynb b/notebooks/lui-2021.ipynb
index 2f749b7..7d669e9 100644
--- a/notebooks/lui-2021.ipynb
+++ b/notebooks/lui-2021.ipynb
@@ -31,9 +31,10 @@
    "outputs": [],
    "source": [
     "import pathlib\n",
-    "import sys\n",
+    "\n",
     "import pandas as pd\n",
-    "from cev.widgets import Embedding, EmbeddingComparisonWidget, compare"
+    "\n",
+    "from cev.widgets import Embedding, EmbeddingComparisonWidget"
    ]
   },
   {
diff --git a/tests/test_widget_utils.py b/tests/test_widget_utils.py
index cd83452..8b41113 100644
--- a/tests/test_widget_utils.py
+++ b/tests/test_widget_utils.py
@@ -1,4 +1,5 @@
 import pandas as pd
+
 from cev._widget_utils import trim_label_series