diff --git a/examples/2_2_reading_data_osm.ipynb b/examples/2_2_reading_data_osm.ipynb
index b3966c5a..3e1adae0 100644
--- a/examples/2_2_reading_data_osm.ipynb
+++ b/examples/2_2_reading_data_osm.ipynb
@@ -130,6 +130,7 @@
    "outputs": [],
    "source": [
     "import importlib_resources\n",
+    "\n",
     "from genet import read_osm"
    ]
   },
diff --git a/examples/4_2_using_network_road_pricing.ipynb b/examples/4_2_using_network_road_pricing.ipynb
index 6cd08c47..c7f55edf 100644
--- a/examples/4_2_using_network_road_pricing.ipynb
+++ b/examples/4_2_using_network_road_pricing.ipynb
@@ -61,6 +61,7 @@
     "from pathlib import Path\n",
     "\n",
     "import pandas as pd\n",
+    "\n",
     "from genet import read_matsim\n",
     "\n",
     "path_to_matsim_network = \"example_data/pt2matsim_network\"\n",
diff --git a/examples/5_3_modifying_network_simplification.ipynb b/examples/5_3_modifying_network_simplification.ipynb
index 490c5575..766c650f 100644
--- a/examples/5_3_modifying_network_simplification.ipynb
+++ b/examples/5_3_modifying_network_simplification.ipynb
@@ -56,6 +56,7 @@
    ],
    "source": [
     "import importlib_resources\n",
+    "\n",
     "from genet import read_osm\n",
     "\n",
     "n = read_osm(\n",
diff --git a/examples/5_4_modifying_network_addition.ipynb b/examples/5_4_modifying_network_addition.ipynb
index b8f3188d..f93b8f4d 100644
--- a/examples/5_4_modifying_network_addition.ipynb
+++ b/examples/5_4_modifying_network_addition.ipynb
@@ -66,6 +66,7 @@
    ],
    "source": [
     "import importlib_resources\n",
+    "\n",
     "from genet import read_osm\n",
     "\n",
     "_n_tiny = read_osm(\n",
diff --git a/examples/6_2_validating_network_google_directions_api.ipynb b/examples/6_2_validating_network_google_directions_api.ipynb
index 4042e0d2..c222ef67 100644
--- a/examples/6_2_validating_network_google_directions_api.ipynb
+++ b/examples/6_2_validating_network_google_directions_api.ipynb
@@ -30,12 +30,13 @@
     "import os\n",
     "import random\n",
     "\n",
-    "import genet\n",
     "import matplotlib.pyplot as plt\n",
+    "from shapely.geometry import LineString\n",
+    "\n",
+    "import genet\n",
     "from genet import google_directions, read_matsim\n",
     "from genet.output.spatial import generate_geodataframes\n",
-    "from genet.utils.io import save_geodataframe\n",
-    "from shapely.geometry import LineString"
+    "from genet.utils.io import save_geodataframe"
    ]
   },
   {
diff --git a/tests/test_java_dtypes.py b/tests/test_java_dtypes.py
index 64984e01..077935e3 100644
--- a/tests/test_java_dtypes.py
+++ b/tests/test_java_dtypes.py
@@ -3,43 +3,43 @@
 
 
 def test_mapping_java_array_to_python_type():
-    assert java_to_python_dtype("java.lang.Array") == list
+    assert isinstance(java_to_python_dtype("java.lang.Array"), list)
 
 
 def test_mapping_java_bool_to_python_type():
-    assert java_to_python_dtype("java.lang.Boolean") == bool
+    assert isinstance(java_to_python_dtype("java.lang.Boolean"), bool)
 
 
 def test_mapping_java_double_to_python_type():
-    assert java_to_python_dtype("java.lang.Double") == float
+    assert isinstance(java_to_python_dtype("java.lang.Double"), float)
 
 
 def test_mapping_java_long_to_python_type():
-    assert java_to_python_dtype("java.lang.Long") == float
+    assert isinstance(java_to_python_dtype("java.lang.Long"), float)
 
 
 def test_mapping_java_float_to_python_type():
-    assert java_to_python_dtype("java.lang.Float") == float
+    assert isinstance(java_to_python_dtype("java.lang.Float"), float)
 
 
 def test_mapping_java_integer_to_python_type():
-    assert java_to_python_dtype("java.lang.Integer") == int
+    assert isinstance(java_to_python_dtype("java.lang.Integer"), int)
 
 
 def test_mapping_java_byte_to_python_type():
-    assert java_to_python_dtype("java.lang.Byte") == int
+    assert isinstance(java_to_python_dtype("java.lang.Byte"), int)
 
 
 def test_mapping_java_short_to_python_type():
-    assert java_to_python_dtype("java.lang.Short") == int
+    assert isinstance(java_to_python_dtype("java.lang.Short"), int)
 
 
 def test_mapping_java_char_to_python_type():
-    assert java_to_python_dtype("java.lang.Char") == str
+    assert isinstance(java_to_python_dtype("java.lang.Char"), str)
 
 
 def test_mapping_java_string_to_python_type():
-    assert java_to_python_dtype("java.lang.String") == str
+    assert isinstance(java_to_python_dtype("java.lang.String"), str)
 
 
 def test_unknown_java_type_raises_exception():