diff --git a/Dockerfile b/Dockerfile
index c3087919..777d391b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -135,19 +135,19 @@ COPY --from=python-dist-builder /opt/sciencebeam_parser/dist /dist
 # lint-flake8
 FROM dev AS lint-flake8
 
-RUN python -m flake8 sciencebeam_parser tests
+RUN python -m flake8 sciencebeam_parser tests benchmarks
 
 
 # lint-pylint
 FROM dev AS lint-pylint
 
-RUN python -m pylint sciencebeam_parser tests
+RUN python -m pylint sciencebeam_parser tests benchmarks
 
 
 # lint-mypy
 FROM dev AS lint-mypy
 
-RUN python -m mypy --ignore-missing-imports sciencebeam_parser tests
+RUN python -m mypy --ignore-missing-imports sciencebeam_parser tests benchmarks
 
 
 # pytest
diff --git a/benchmarks/tests/report_test.py b/benchmarks/tests/report_test.py
index b4b1355a..1e26ba73 100644
--- a/benchmarks/tests/report_test.py
+++ b/benchmarks/tests/report_test.py
@@ -289,6 +289,8 @@ def test_each_corpus_has_collapsible_section(self):
 
 class TestUnequalDocsNote:
     def test_silent_when_every_run_covered_the_same_documents(self):
+        # pylint: disable=use-implicit-booleaness-not-comparison
+        # the empty list is the contract; `not ...` would also accept None
         assert _unequal_docs_note([("grobid", 10), ("local", 10)]) == []
 
     def test_calls_out_a_difference_with_the_counts(self):
@@ -351,5 +353,5 @@ def test_overall_ignores_a_corpus_only_one_run_scored(self):
         assert "Overall (10 docs across 1 corpora)" in report
         assert "Excludes b, which not every run scored" in report
         # The unequal-columns warning belongs to b's own section, not the overall row.
-        overall = report.split("<details>")[0]
+        overall = report.split("<details>", maxsplit=1)[0]
         assert "Unequal document sets" not in overall