diff --git a/python/dune/perftool/__init__.py b/python/dune/perftool/__init__.py
index 3c005102942b5ef394959c7aaab1e9d29938b289..c822006fb2d77f7ca7e4125e379807baff3aa800 100644
--- a/python/dune/perftool/__init__.py
+++ b/python/dune/perftool/__init__.py
@@ -4,10 +4,10 @@ import os
 os.environ["OMP_NUM_THREADS"] = "1"
 
 # Trigger imports that involve monkey patching!
-import dune.perftool.loopy.symbolic
+import dune.perftool.loopy.symbolic  # noqa
 
 # Trigger some imports that are needed to have all backend implementations visible
 # to the selection mechanisms
-import dune.perftool.pdelab
-import dune.perftool.sumfact
-import dune.perftool.blockstructured
+import dune.perftool.pdelab  # noqa
+import dune.perftool.sumfact  # noqa
+import dune.perftool.blockstructured  # noqa