diff --git a/boxtree/tree_build.py b/boxtree/tree_build.py
index d01ac7f9..745f9531 100644
--- a/boxtree/tree_build.py
+++ b/boxtree/tree_build.py
@@ -1111,7 +1111,7 @@ def my_realloc_zeros_nocopy(ary, shape=nboxes_guess):
                     wait_for.extend(have_upper_level_split_box.events)
 
                     # writes: force_split_box, have_upper_level_split_box
-                    evt = level_restrict_kernel(
+                    evt = level_restrict_kernel(  # pylint: disable=possibly-used-before-assignment  # noqa: E501
                         upper_level,
                         root_extent,
                         box_has_children,
@@ -1451,8 +1451,8 @@ def make_arange(start, offset=level_used_box_count):
                     box_target_starts, box_target_counts_cumul,
                     )
                 + ((
-                    box_source_counts_nonchild,
-                    box_target_counts_nonchild,
+                    box_source_counts_nonchild,  # pylint: disable=possibly-used-before-assignment  # noqa: E501
+                    box_target_counts_nonchild,  # pylint: disable=possibly-used-before-assignment  # noqa: E501
                     ) if srcntgts_have_extent else ())
                 ),
                 queue=queue, range=slice(nsrcntgts),
diff --git a/test/test_fmm.py b/test/test_fmm.py
index f66af872..dc34f1e5 100644
--- a/test/test_fmm.py
+++ b/test/test_fmm.py
@@ -348,7 +348,7 @@ def test_fmm_completeness(actx_factory, dims, nsources_req, ntargets_req,
             from boxtree.visualization import draw_box_lists
             draw_box_lists(
                     plotter,
-                    pre_merge_host_trav if who_has_extent else host_trav,
+                    pre_merge_host_trav if who_has_extent else host_trav,  # pylint: disable=possibly-used-before-assignment  # noqa: E501
                     22)
             # from boxtree.visualization import draw_same_level_non_well_sep_boxes
             # draw_same_level_non_well_sep_boxes(plotter, host_trav, 2)
diff --git a/test/test_tree.py b/test/test_tree.py
index b8df1644..ee4405a0 100644
--- a/test/test_tree.py
+++ b/test/test_tree.py
@@ -208,7 +208,7 @@ def run_build_test(builder, actx, dims, dtype, nparticles, visualize,
             else:
                 assert refine_weights is not None
                 box_weight = np.sum(
-                    refine_weights_reordered[start:start+nparticles_in_box])
+                    refine_weights_reordered[start:start+nparticles_in_box])  # pylint: disable=possibly-used-before-assignment  # noqa: E501
                 if box_weight > max_leaf_refine_weight:
                     print("refine weight exceeded ({} > {}); box {}".format(
                         box_weight, max_leaf_refine_weight, ibox))