diff --git a/python/dune/perftool/generation/loopy.py b/python/dune/perftool/generation/loopy.py
index 87a717bb430db1d1f62231a079340e7c726c6c44..10620a1ef073c181774a21aff8073eb1fc8fad9a 100644
--- a/python/dune/perftool/generation/loopy.py
+++ b/python/dune/perftool/generation/loopy.py
@@ -13,6 +13,7 @@ iname = generator_factory(item_tags=("iname",))
 pymbolic_expr = generator_factory(item_tags=("kernel", "pymbolic"))
 function_mangler = generator_factory(item_tags=("mangler",))
 
+
 @generator_factory(item_tags=("argument", "globalarg"),
                    cache_key_generator=lambda n, **kw: n)
 def globalarg(name, shape=loopy.auto, **kw):
diff --git a/python/dune/perftool/pdelab/driver.py b/python/dune/perftool/pdelab/driver.py
index 386eef2065f7e68ab886b8485b00adc22283dc45..2823f9447c18fd6ffca95ab2156ff7764b9f0162 100644
--- a/python/dune/perftool/pdelab/driver.py
+++ b/python/dune/perftool/pdelab/driver.py
@@ -1403,6 +1403,7 @@ def time_loop():
         if get_option("compare_l2errorsquared"):
             compare_L2_squared()
 
+
 def generate_driver(formdatas, data):
     # The driver module uses a global dictionary for storing necessary data
     set_driver_data(formdatas, data)