diff --git a/etrago/cluster/electrical.py b/etrago/cluster/electrical.py
index 35f6dc60..2a73ca24 100755
--- a/etrago/cluster/electrical.py
+++ b/etrago/cluster/electrical.py
@@ -49,8 +49,8 @@
         strategies_one_ports,
     )
     from etrago.tools.utilities import (
-        set_control_strategies,
         select_elec_network,
+        set_control_strategies,
     )
 
     logger = logging.getLogger(__name__)
diff --git a/etrago/cluster/gas.py b/etrago/cluster/gas.py
index 919ae075..5768b3cd 100644
--- a/etrago/cluster/gas.py
+++ b/etrago/cluster/gas.py
@@ -43,10 +43,7 @@
         kmedoids_dijkstra_clustering,
         sum_with_inf,
     )
-    from etrago.tools.utilities import (
-        find_buses_area,
-        set_control_strategies,
-    )
+    from etrago.tools.utilities import find_buses_area, set_control_strategies
 
 logger = logging.getLogger(__name__)
 
diff --git a/etrago/network.py b/etrago/network.py
index bb6d67e2..51dbc074 100644
--- a/etrago/network.py
+++ b/etrago/network.py
@@ -86,6 +86,7 @@
 )
 from etrago.tools.utilities import (
     add_missing_components,
+    adjust_before_optimization,
     adjust_CH4_gen_carriers,
     buses_by_country,
     check_args,
@@ -110,7 +111,6 @@
     set_random_noise,
     set_trafo_costs,
     update_busmap,
-    adjust_before_optimization,
 )
 
 logger = logging.getLogger(__name__)