diff --git a/gnm/shape/data/versions/v3_0/gnm_head.npz b/gnm/shape/data/versions/v3_0/gnm_head.npz
index 33dcfcc4..1ddcb04c 100644
Binary files a/gnm/shape/data/versions/v3_0/gnm_head.npz and b/gnm/shape/data/versions/v3_0/gnm_head.npz differ
diff --git a/gnm/shape/gnm_base_test.py b/gnm/shape/gnm_base_test.py
index ac02300a..6be831ad 100644
--- a/gnm/shape/gnm_base_test.py
+++ b/gnm/shape/gnm_base_test.py
@@ -45,7 +45,7 @@ def __init__(
       self,
       version: gnm_specs.GNMVersion,
       variant: gnm_specs.GNMVariant,
-  ) -> None:
+  ):
     self.version = version
     self.variant = variant
 
@@ -66,18 +66,18 @@ def _from_model_data(
 
 class GNMBaseTest(absltest.TestCase):
 
-  def setUp(self) -> None:
+  def setUp(self):
     super().setUp()
     self.gnm = DummyGNM(
         version=_TEST_FULL_VERSION,
         variant=_TEST_VARIANT,
     )
 
-  def test_properties(self) -> None:
+  def test_properties(self):
     self.assertEqual(self.gnm.major_version, _TEST_MAJOR_VERSION)
     self.assertEqual(self.gnm.body_part, _TEST_BODY_PART)
 
-  def test_from_gnm(self) -> None:
+  def test_from_gnm(self):
     new_gnm = DummyGNM.from_gnm(self.gnm)
     self.assertIsInstance(new_gnm, DummyGNM)
     self.assertEqual(new_gnm.version, _TEST_FULL_VERSION)
diff --git a/gnm/shape/gnm_xnp_test.py b/gnm/shape/gnm_xnp_test.py
index 13c5b077..b25bfe98 100644
--- a/gnm/shape/gnm_xnp_test.py
+++ b/gnm/shape/gnm_xnp_test.py
@@ -26,25 +26,25 @@
 
 class GNMXnpTest(absltest.TestCase):
 
-  def test_annotations_match_schema(self) -> None:
+  def test_annotations_match_schema(self):
     expected_attributes = set(gnm_data_schema.GNM_DATA_ATTRIBUTES)
     actual_attributes = set(gnm_xnp.GNM.__annotations__.keys())
     self.assertEqual(actual_attributes, expected_attributes)
 
-  def test_dataclass_fields_match_schema(self) -> None:
+  def test_dataclass_fields_match_schema(self):
     expected_attributes = set(gnm_data_schema.GNM_DATA_ATTRIBUTES)
     actual_fields = {f.name for f in dataclasses.fields(gnm_xnp.GNM)}
     self.assertEqual(actual_fields, expected_attributes)
 
-  def test_cannot_instantiate_abstract_gnm(self) -> None:
+  def test_cannot_instantiate_abstract_gnm(self):
     with self.assertRaises(TypeError):
       gnm_xnp.GNM()  # pytype: disable=not-instantiable,missing-parameter  # pylint: disable=abstract-class-instantiated
 
-  def test_from_model_data_raises_not_implemented(self) -> None:
+  def test_from_model_data_raises_not_implemented(self):
     with self.assertRaises(NotImplementedError):
       gnm_xnp.GNM._from_model_data({})  # pylint: disable=protected-access
 
-  def test_cannot_instantiate_concrete_gnm_via_constructor(self) -> None:
+  def test_cannot_instantiate_concrete_gnm_via_constructor(self):
     with self.assertRaises(TypeError):
       gnm_numpy.GNM()  # pytype: disable=not-instantiable,missing-parameter
 
diff --git a/gnm/shape/visualization/render_gnm_test.py b/gnm/shape/visualization/render_gnm_test.py
index c57f163d..7ccffad0 100644
--- a/gnm/shape/visualization/render_gnm_test.py
+++ b/gnm/shape/visualization/render_gnm_test.py
@@ -41,7 +41,7 @@ def _write_gif(
     name: str,
     images: np.ndarray,
     fps: int = 10,
-) -> None:
+):
   """Writes an animated GIF to the undeclared outputs directory."""
   outputs_dir = epath.Path(outputs_dir)
   gif_path = outputs_dir / f'{name}.gif'
@@ -52,7 +52,7 @@ def _write_images(
     outputs_dir: epath.Path | str,
     name: str,
     images: np.ndarray,
-) -> None:
+):
   """Writes a row of images to the undeclared outputs directory."""
   png_path = (
       outputs_dir / f'{name}.png'  # pyrefly: ignore[unsupported-operation]