diff --git a/.basedpyright/baseline.json b/.basedpyright/baseline.json
index 266f4680..dcc706ef 100644
--- a/.basedpyright/baseline.json
+++ b/.basedpyright/baseline.json
@@ -35504,50 +35504,50 @@
                 }
             },
             {
-                "code": "reportUnknownArgumentType",
+                "code": "reportUnknownMemberType",
                 "range": {
-                    "startColumn": 21,
-                    "endColumn": 34,
+                    "startColumn": 4,
+                    "endColumn": 17,
                     "lineCount": 1
                 }
             },
             {
-                "code": "reportUnknownMemberType",
+                "code": "reportUnknownArgumentType",
                 "range": {
-                    "startColumn": 8,
-                    "endColumn": 21,
+                    "startColumn": 42,
+                    "endColumn": 52,
                     "lineCount": 1
                 }
             },
             {
                 "code": "reportUnknownArgumentType",
                 "range": {
-                    "startColumn": 46,
-                    "endColumn": 56,
+                    "startColumn": 25,
+                    "endColumn": 38,
                     "lineCount": 1
                 }
             },
             {
-                "code": "reportUnknownArgumentType",
+                "code": "reportUnknownMemberType",
                 "range": {
-                    "startColumn": 21,
-                    "endColumn": 34,
+                    "startColumn": 4,
+                    "endColumn": 17,
                     "lineCount": 1
                 }
             },
             {
-                "code": "reportUnknownMemberType",
+                "code": "reportUnknownArgumentType",
                 "range": {
-                    "startColumn": 8,
-                    "endColumn": 21,
+                    "startColumn": 41,
+                    "endColumn": 51,
                     "lineCount": 1
                 }
             },
             {
                 "code": "reportUnknownArgumentType",
                 "range": {
-                    "startColumn": 45,
-                    "endColumn": 55,
+                    "startColumn": 25,
+                    "endColumn": 38,
                     "lineCount": 1
                 }
             },
diff --git a/boxtree/cost.py b/boxtree/cost.py
index 6ef512f4..2c451d33 100644
--- a/boxtree/cost.py
+++ b/boxtree/cost.py
@@ -244,7 +244,6 @@ def process_form_multipoles(self, actx: ArrayContext,
         :return: an array of shape (nsource_boxes,), with each entry represents
             the cost of the box.
         """
-        pass
 
     @abstractmethod
     def process_coarsen_multipoles(self, actx: ArrayContext,
@@ -261,7 +260,6 @@ def process_coarsen_multipoles(self, actx: ArrayContext,
             immediate clear how per-box cost of upward propagation will be useful for
             distributed load balancing.
         """
-        pass
 
     @abstractmethod
     def get_ndirect_sources_per_target_box(self, actx: ArrayContext,
@@ -273,7 +271,6 @@ def get_ndirect_sources_per_target_box(self, actx: ArrayContext,
         :return: an array of shape (ntarget_boxes,), with each entry representing
             the number of direct evaluation sources for that target box.
         """
-        pass
 
     @abstractmethod
     def process_direct(self, actx: ArrayContext,
@@ -294,7 +291,6 @@ def process_direct(self, actx: ArrayContext,
         :return: an array of shape (ntarget_boxes,), with each entry represents
             the cost of the box.
         """
-        pass
 
     @abstractmethod
     def process_list2(self, actx: ArrayContext, traversal, m2l_cost):
@@ -306,7 +302,6 @@ def process_list2(self, actx: ArrayContext, traversal, m2l_cost):
             each entry representing the cost of multipole-to-local
             translations to this box.
         """
-        pass
 
     @abstractmethod
     def process_list3(self, actx: ArrayContext, traversal, m2p_cost,
@@ -324,7 +319,6 @@ def process_list3(self, actx: ArrayContext, traversal, m2p_cost,
             cost of evaluating all targets inside this box from multipole
             expansions of list-3 boxes.
         """
-        pass
 
     @abstractmethod
     def process_list4(self, actx: ArrayContext, traversal, p2l_cost):
@@ -337,7 +331,6 @@ def process_list4(self, actx: ArrayContext, traversal, p2l_cost):
             each entry representing the cost of point-to-local translations to
             this box.
         """
-        pass
 
     @abstractmethod
     def process_eval_locals(self, actx: ArrayContext, traversal, l2p_cost,
@@ -354,7 +347,6 @@ def process_eval_locals(self, actx: ArrayContext, traversal, l2p_cost,
         :return: an array of shape (ntarget_boxes,), the cost of evaluating the
             potentials of all targets inside this box from its local expansion.
         """
-        pass
 
     @abstractmethod
     def process_refine_locals(self, actx: ArrayContext, traversal, l2l_cost):
@@ -370,7 +362,6 @@ def process_refine_locals(self, actx: ArrayContext, traversal, l2l_cost):
             immediate clear how per-box cost of downward propagation will be useful
             for distributed load balancing.
         """
-        pass
 
     @abstractmethod
     def aggregate_over_boxes(self, actx: ArrayContext, per_box_result):
@@ -379,7 +370,6 @@ def aggregate_over_boxes(self, actx: ArrayContext, per_box_result):
         :arg per_box_result: an array to be sumed.
         :return: a :class:`float`, the result of the sum.
         """
-        pass
 
     @staticmethod
     def cost_factors_to_dev(cost_factors, actx: ArrayContext | None):
@@ -451,7 +441,6 @@ def zero_cost_per_box(self, actx: ArrayContext, nboxes):
         :param nboxes: the number of boxes
         :return: an array of shape (*nboxes*,), representing the zero per-box cost.
         """
-        pass
 
     def cost_per_box(self, actx: ArrayContext, traversal, level_to_order,
                      calibration_params,
diff --git a/boxtree/fmm.py b/boxtree/fmm.py
index dcad1f8b..b155a3cb 100644
--- a/boxtree/fmm.py
+++ b/boxtree/fmm.py
@@ -337,7 +337,6 @@ def communicate_mpoles(self,                # noqa: B027
         :returns: Statistics of the communication if *return_stats* is True. *None*
             otherwise.
         """
-        pass
 
 # }}}
 
diff --git a/boxtree/pyfmmlib_integration.py b/boxtree/pyfmmlib_integration.py
index 5980bb97..db533d47 100644
--- a/boxtree/pyfmmlib_integration.py
+++ b/boxtree/pyfmmlib_integration.py
@@ -43,8 +43,7 @@
 
 import numpy as np
 
-import pytools.obj_array as obj_array
-from pytools import log_process, memoize_method
+from pytools import log_process, memoize_method, obj_array
 
 from boxtree.fmm import ExpansionWranglerInterface, TreeIndependentDataForWrangler
 
diff --git a/boxtree/tools.py b/boxtree/tools.py
index ce2c3791..cf0762b5 100644
--- a/boxtree/tools.py
+++ b/boxtree/tools.py
@@ -893,7 +893,7 @@ def run_mpi(script: str, num_processes: int, env: dict[str, Any]) -> None:
 
 def get_coord_vec_dtype(
         coord_dtype: np.dtype, dimensions: int) -> np.dtype:
-    import pyopencl.cltypes as cltypes
+    from pyopencl import cltypes
     if dimensions == 1:
         return coord_dtype
     else:
diff --git a/boxtree/tree.py b/boxtree/tree.py
index b36a459b..60bc17f5 100644
--- a/boxtree/tree.py
+++ b/boxtree/tree.py
@@ -272,8 +272,7 @@ def bounding_box(self) -> tuple[np.ndarray, np.ndarray]:
 
     def get_box_size(self, ibox):
         lev = self.box_levels[ibox]
-        box_size = self.root_extent * 0.5**lev
-        return box_size
+        return self.root_extent * 0.5**lev
 
     def get_box_extent(self, ibox):
         box_size = self.get_box_size(ibox)
@@ -1059,7 +1058,7 @@ def get_filter_target_lists_in_user_order_kernel(self, particle_id_dtype,
 
         from boxtree.tools import VectorArg
 
-        builder = ListOfListsBuilder(self.context,
+        return ListOfListsBuilder(self.context,
             [("filt_tgt_list", particle_id_dtype)], Template("""//CL//
             typedef ${dtype_to_ctype(particle_id_dtype)} particle_id_t;
 
@@ -1087,8 +1086,6 @@ def get_filter_target_lists_in_user_order_kernel(self, particle_id_dtype,
                     VectorArg(particle_id_dtype, "box_target_counts_nonchild"),
                 ])
 
-        return builder
-
     def filter_target_lists_in_user_order(self, actx, tree, flags):
         """
         :arg flags: an array of length :attr:`boxtree.Tree.ntargets` of
diff --git a/boxtree/tree_build_kernels.py b/boxtree/tree_build_kernels.py
index a6b27af8..373b5930 100644
--- a/boxtree/tree_build_kernels.py
+++ b/boxtree/tree_build_kernels.py
@@ -165,11 +165,11 @@ def make_morton_bin_count_type(device, dimensions, particle_id_dtype,
         fields.append(("nonchild_srcntgts", particle_id_dtype))
 
     from boxtree.tools import padded_bin
-    for mnr in range(2**dimensions):
-        fields.append((f"pcnt{padded_bin(mnr, dimensions)}", particle_id_dtype))
+    fields.extend((f"pcnt{padded_bin(mnr, dimensions)}", particle_id_dtype)
+        for mnr in range(2**dimensions))
     # Morton bin weight totals
-    for mnr in range(2**dimensions):
-        fields.append((f"pwt{padded_bin(mnr, dimensions)}", refine_weight_dtype))
+    fields.extend((f"pwt{padded_bin(mnr, dimensions)}", refine_weight_dtype)
+        for mnr in range(2**dimensions))
 
     dtype = np.dtype(fields)
 
diff --git a/pyproject.toml b/pyproject.toml
index 451c7b62..e1382e73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -116,6 +116,8 @@ required-imports = ["from __future__ import annotations"]
 [tool.ruff.lint.per-file-ignores]
 "doc/**/*.py" = ["I002"]
 "examples/**/*.py" = ["I002"]
+"test/test_*.py" = ["S102"]
+"doc/conf.py" = ["S102"]
 
 [tool.typos.default]
 extend-ignore-re = [
diff --git a/test/test_cost_model.py b/test/test_cost_model.py
index 04b419af..50ed8fa1 100644
--- a/test/test_cost_model.py
+++ b/test/test_cost_model.py
@@ -583,11 +583,9 @@ def test_cost_model_op_counts_agree_with_constantone_wrangler(
     if not timing_data:
         return
 
-    mismatches = []
-    for stage in timing_data:
-        if timing_data[stage]["ops_elapsed"] != modeled_time[stage]:
-            mismatches.append(
-                    (stage, timing_data[stage]["ops_elapsed"], modeled_time[stage]))
+    mismatches = [(stage, timing_data[stage]["ops_elapsed"], modeled_time[stage])
+        for stage in timing_data
+        if timing_data[stage]["ops_elapsed"] != modeled_time[stage]]
 
     assert not mismatches, "\n".join(str(s) for s in mismatches)
 
diff --git a/test/test_fmm.py b/test/test_fmm.py
index 1d6bbcb2..e9164e29 100644
--- a/test/test_fmm.py
+++ b/test/test_fmm.py
@@ -158,7 +158,6 @@ def _get_target_slice(self, ibox):
             (2, 10**5, None, "", p_normal, p_normal, "tree", "linf", "static_linf"),
             (3, 5 * 10**5, 4*10**4, "t", p_normal, p_normal, "tree", "linf", "static_linf"),  # noqa: E501
 
-            (3, 5 * 10**5, 4*10**4, "t", p_normal, p_normal, None, "linf", "static_linf"),  # noqa: E501
             (3, 5 * 10**5, 4*10**4, "t", p_normal, p_normal, None, "linf", "precise_linf"),  # noqa: E501
             (3, 5 * 10**5, 4*10**4, "t", p_normal, p_normal, None, "l2", "precise_linf"),  # noqa: E501
             (3, 5 * 10**5, 4*10**4, "t", p_normal, p_normal, None, "l2", "static_l2"),
diff --git a/test/test_traversal.py b/test/test_traversal.py
index 298cb3a4..96fc586d 100644
--- a/test/test_traversal.py
+++ b/test/test_traversal.py
@@ -29,8 +29,8 @@
 import numpy.linalg as la
 import pytest
 
-import pytools.obj_array as obj_array
 from arraycontext import pytest_generate_tests_for_array_contexts
+from pytools import obj_array
 
 from boxtree.array_context import (
     PytestPyOpenCLArrayContextFactory,
diff --git a/test/test_tree.py b/test/test_tree.py
index 57b17de4..edb1ba45 100644
--- a/test/test_tree.py
+++ b/test/test_tree.py
@@ -226,9 +226,7 @@ def run_build_test(builder, actx, dims, dtype, nparticles, visualize,
 def particle_tree_test_decorator(f):
     f = pytest.mark.opencl(f)
     f = pytest.mark.parametrize("dtype", [np.float64, np.float32])(f)
-    f = pytest.mark.parametrize("dims", [2, 3])(f)
-
-    return f
+    return pytest.mark.parametrize("dims", [2, 3])(f)
 
 
 @particle_tree_test_decorator
diff --git a/test/test_tree_of_boxes.py b/test/test_tree_of_boxes.py
index 51a1e1be..109ec052 100644
--- a/test/test_tree_of_boxes.py
+++ b/test/test_tree_of_boxes.py
@@ -29,7 +29,6 @@
 import numpy as np
 import pytest
 
-import pytools.obj_array as obj_array
 from arraycontext import pytest_generate_tests_for_array_contexts
 
 # This means boxtree's tests have a hard dependency on meshmode. That's OK.
@@ -38,6 +37,7 @@
     PyOpenCLArrayContext,
     PytestPyOpenCLArrayContextFactory,
 )
+from pytools import obj_array
 
 from boxtree import (
     make_meshmode_mesh_from_leaves,