diff --git a/python/dune/perftool/options.py b/python/dune/perftool/options.py
index a4c2e21070b45cbe6d3d6273744fb940181399e1..4b4189f93c549bd273aea07e6760a52c1461a8b7 100644
--- a/python/dune/perftool/options.py
+++ b/python/dune/perftool/options.py
@@ -119,4 +119,4 @@ def option_switch(opt):
             return opt
         else:
             return "default"
-    return _switch
\ No newline at end of file
+    return _switch
diff --git a/python/dune/perftool/pdelab/restriction.py b/python/dune/perftool/pdelab/restriction.py
index e889fcd64c743e6cc301aa46fa1d71162c2662d7..7d77a17b6c7e14107a359f711d110584b1a83cb2 100644
--- a/python/dune/perftool/pdelab/restriction.py
+++ b/python/dune/perftool/pdelab/restriction.py
@@ -7,4 +7,4 @@ def restricted_name(name, restriction):
     if restriction == Restriction.POSITIVE:
         return name + '_n'
     if restriction == Restriction.NEGATIVE:
-        return name + '_s'
\ No newline at end of file
+        return name + '_s'
diff --git a/python/dune/perftool/sumfact/__init__.py b/python/dune/perftool/sumfact/__init__.py
index 4f1ce7c9d8dbe7946c664dc9ebe2f1b51fd340f7..3f081643c4230fa3168db58beef408640e2a5290 100644
--- a/python/dune/perftool/sumfact/__init__.py
+++ b/python/dune/perftool/sumfact/__init__.py
@@ -1,7 +1,6 @@
 # Trigger some imports that are needed to have all backend implementations visible
 # to the selection mechanisms
 import dune.perftool.sumfact.amatrix
-import dune.perftool.sumfact.quadrature
 import dune.perftool.sumfact.sumfact
 
 from dune.perftool.sumfact.sumfact import start_sumfactorization