diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 3e6f505..8e733ba 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Build docs
         run: uv run sphinx-build -b html docs/ docs/_build/html
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v5
         with:
           path: docs/_build/html
 
diff --git a/src/vibeproj/fused_kernels.py b/src/vibeproj/fused_kernels.py
index 0bb8ca4..1f4d010 100644
--- a/src/vibeproj/fused_kernels.py
+++ b/src/vibeproj/fused_kernels.py
@@ -281,8 +281,7 @@ def can_fuse(projection_name: str, direction: str) -> bool:
 
 _KERNEL_UNIT_SIGNATURE_NEEDLE = "int src_north_first, int dst_north_first, int n"
 _KERNEL_UNIT_SIGNATURE_REPLACEMENT = (
-    "double x_unit_to_m, double y_unit_to_m,\n"
-    "    int src_north_first, int dst_north_first, int n"
+    "double x_unit_to_m, double y_unit_to_m,\n    int src_north_first, int dst_north_first, int n"
 )
 
 
@@ -290,6 +289,7 @@ def _inject_linear_unit_args(source: str) -> str:
     """Inject projected-unit ABI params into compiled kernel source."""
     return source.replace(_KERNEL_UNIT_SIGNATURE_NEEDLE, _KERNEL_UNIT_SIGNATURE_REPLACEMENT)
 
+
 # ===================================================================
 # Plate Carrée kernels
 # ===================================================================
diff --git a/tests/test_accuracy_api_matrix.py b/tests/test_accuracy_api_matrix.py
index db9338f..01dfa6e 100644
--- a/tests/test_accuracy_api_matrix.py
+++ b/tests/test_accuracy_api_matrix.py
@@ -207,9 +207,7 @@ def test_proj_to_proj_transform_buffers_unit_pairs_vs_pyproj(
     )
 
     exp_inv_x, exp_inv_y = pp.transform(exp_x, exp_y, direction=TransformDirection.INVERSE)
-    got_inv_x, got_inv_y = vp.transform_buffers(
-        exp_x.copy(), exp_y.copy(), direction="INVERSE"
-    )
+    got_inv_x, got_inv_y = vp.transform_buffers(exp_x.copy(), exp_y.copy(), direction="INVERSE")
     _assert_proj_to_proj_matches(
         "transform_buffers",
         got_inv_x,
diff --git a/tests/test_accuracy_gpu_oracle.py b/tests/test_accuracy_gpu_oracle.py
index 7cb20a9..3149adc 100644
--- a/tests/test_accuracy_gpu_oracle.py
+++ b/tests/test_accuracy_gpu_oracle.py
@@ -238,7 +238,9 @@ def _proj_to_proj_inputs(src_crs, lat_range, lon_range):
     return src_x[mask], src_y[mask]
 
 
-def _assert_proj_to_proj_matches(api_name, result_x, result_y, exp_x, exp_y, tol_m, label, direction):
+def _assert_proj_to_proj_matches(
+    api_name, result_x, result_y, exp_x, exp_y, tol_m, label, direction
+):
     max_err = _max_planar_error_m(result_x, result_y, exp_x, exp_y)
     assert max_err < tol_m, (
         f"{label} GPU {api_name} {direction} proj_to_proj error {max_err:.6e} m exceeds {tol_m} m"
@@ -358,11 +360,7 @@ def test_gpu_proj_to_proj_transform_chunked_unit_pairs_vs_pyproj(
 
 @pytest.mark.parametrize(
     "label, crs_spec, lat_range, lon_range, fwd_tol_m, inv_tol_deg",
-    [
-        case
-        for case in EPSG_SWEEP
-        if case[1] in ("EPSG:2222", "EPSG:3435")
-    ],
+    [case for case in EPSG_SWEEP if case[1] in ("EPSG:2222", "EPSG:3435")],
     ids=[f"{case[0]}_ds" for case in EPSG_SWEEP if case[1] in ("EPSG:2222", "EPSG:3435")],
 )
 def test_gpu_transform_buffers_ds_vs_pyproj_non_meter_tmerc(