diff --git a/src/aiida/cmdline/commands/cmd_process.py b/src/aiida/cmdline/commands/cmd_process.py
index 2074e9cec..285fe00e4 100644
--- a/src/aiida/cmdline/commands/cmd_process.py
+++ b/src/aiida/cmdline/commands/cmd_process.py
@@ -342,7 +342,9 @@ def process_kill(processes, all_entries, timeout, wait, force_kill):
     with capture_logging() as stream:
         try:
             message = 'Killed through `verdi process kill`'
-            control.kill_processes(processes, all_entries=all_entries, timeout=timeout, wait=wait, message=message, force_kill=force_kill)
+            control.kill_processes(
+                processes, all_entries=all_entries, timeout=timeout, wait=wait, message=message, force_kill=force_kill
+            )
         except control.ProcessTimeoutException as exception:
             echo.echo_critical(f'{exception}\n{REPAIR_INSTRUCTIONS}')
 
diff --git a/src/aiida/cmdline/params/options/main.py b/src/aiida/cmdline/params/options/main.py
index 35a90fbe1..2d74d3a2a 100644
--- a/src/aiida/cmdline/params/options/main.py
+++ b/src/aiida/cmdline/params/options/main.py
@@ -329,7 +329,13 @@ def set_log_level(ctx, _param, value):
 
 FORCE = OverridableOption('-f', '--force', is_flag=True, default=False, help='Do not ask for confirmation.')
 
-FORCE_KILL = OverridableOption('-fk', '--force-kill', is_flag=True, default=False, help='Kills the process without waiting for a response if the job is killed.')
+FORCE_KILL = OverridableOption(
+    '-fk',
+    '--force-kill',
+    is_flag=True,
+    default=False,
+    help='Kills the process without waiting for a response if the job is killed.',
+)
 
 SILENT = OverridableOption('-s', '--silent', is_flag=True, default=False, help='Suppress any output printed to stdout.')
 
diff --git a/src/aiida/engine/processes/control.py b/src/aiida/engine/processes/control.py
index 5708abb50..a8e2d61a1 100644
--- a/src/aiida/engine/processes/control.py
+++ b/src/aiida/engine/processes/control.py
@@ -201,7 +201,9 @@ def kill_processes(
         return
 
     controller = get_manager().get_process_controller()
-    _perform_actions(processes, controller.kill_process, 'kill', 'killing', timeout, wait, msg=message, force_kill=force_kill)
+    _perform_actions(
+        processes, controller.kill_process, 'kill', 'killing', timeout, wait, msg=message, force_kill=force_kill
+    )
 
 
 def _perform_actions(