diff --git a/Makefile b/Makefile
index 27e2b9698..7a0cb68cb 100644
--- a/Makefile
+++ b/Makefile
@@ -118,9 +118,7 @@ test: all
 
 
 lint:
-	flake8 src
-	flake8 test
-	flake8 tools/*
+	flake8 src test tools benchmark/benchmark.py benchmark/plot_benchmark.py
 	clang-format -output-replacements-xml src/*.c src/*.h src/*.js | (! grep '<replacement ')
 
 
diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index a92ac31da..392613122 100644
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -7,7 +7,7 @@ import sys
 sys.path.insert(
     0, str((Path(__file__).resolve().parents[1] / 'test')))
 
-import conftest
+import conftest  # noqa
 
 
 SKIP = set(['fft', 'hyantes'])