diff --git a/control.ipynb b/control.ipynb
index ce07a3e..a5a58ad 100644
--- a/control.ipynb
+++ b/control.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "2f454b5b",
+   "id": "0",
    "metadata": {},
    "source": [
     "# AiiDA control"
@@ -11,7 +11,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "03c3d207",
+   "id": "1",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -25,7 +25,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "56f4a261",
+   "id": "2",
    "metadata": {},
    "outputs": [],
    "source": [
diff --git a/home/control.py b/home/control.py
index 71702b5..081f64e 100644
--- a/home/control.py
+++ b/home/control.py
@@ -1,12 +1,12 @@
 import subprocess
-from aiida import engine
-import ipywidgets as ipw
+
 import aiidalab_widgets_base as awb
-from aiida import orm, manage
+import ipywidgets as ipw
 import plumpy
 import traitlets as tr
+from aiida import engine, manage
 from IPython.display import clear_output
-import subprocess
+
 
 class DaemonControlWidget(ipw.VBox):
     def __init__(self, *args, **kwargs):
@@ -22,12 +22,20 @@ def __init__(self, *args, **kwargs):
         stop_button.on_click(self._stop_daemon)
 
         # Restart daemon.
-        restart_button = ipw.Button(description="Restart daemon", button_style="warning")
+        restart_button = ipw.Button(
+            description="Restart daemon", button_style="warning"
+        )
         restart_button.on_click(self._restart_daemon)
 
-        self.info=ipw.HTML()
+        self.info = ipw.HTML()
         self._update_status()
-        super().__init__(children=[self.info, self._status, ipw.HBox([start_button, stop_button, restart_button])])
+        super().__init__(
+            children=[
+                self.info,
+                self._status,
+                ipw.HBox([start_button, stop_button, restart_button]),
+            ]
+        )
 
     def _restart_daemon(self, _=None):
         self._clear_status()
@@ -56,37 +64,48 @@ def _stop_daemon(self, _=None):
     def _update_status(self, _=None):
         self._clear_status()
         with self._status:
-            result = subprocess.run(["verdi", "daemon", "status"], capture_output=True, text=True)
+            result = subprocess.run(
+                ["verdi", "daemon", "status"], capture_output=True, text=True, check=False
+            )
             print(result.stdout, result.stderr)
-    
+
     def _clear_status(self):
         with self._status:
             clear_output()
 
 
-
 class ProcessControlWidget(ipw.VBox):
     def __init__(self):
         process_list = awb.ProcessListWidget(path_to_root="../../")
-        past_days_widget = ipw.IntText(value=7, description='Past days:')
-        tr.link((past_days_widget, 'value'), (process_list, 'past_days'))
+        past_days_widget = ipw.IntText(value=7, description="Past days:")
+        tr.link((past_days_widget, "value"), (process_list, "past_days"))
 
         all_days_checkbox = ipw.Checkbox(description="All days", value=True)
-        tr.dlink((all_days_checkbox, 'value'), (past_days_widget, 'disabled'))
-        tr.dlink((all_days_checkbox, 'value'), (process_list, 'past_days'), transform=lambda v: -1 if v else past_days_widget.value)
+        tr.dlink((all_days_checkbox, "value"), (past_days_widget, "disabled"))
+        tr.dlink(
+            (all_days_checkbox, "value"),
+            (process_list, "past_days"),
+            transform=lambda v: -1 if v else past_days_widget.value,
+        )
 
         available_states = [state.value for state in plumpy.ProcessState]
-        process_state_widget = ipw.SelectMultiple(options=available_states,
-                                                value=["running", "waiting"],
-                                                description='Process State:',
-                                                style={'description_width': 'initial'},
-                                                disabled=False)
-        tr.dlink((process_state_widget, 'value'), (process_list, 'process_states'))
+        process_state_widget = ipw.SelectMultiple(
+            options=available_states,
+            value=["running", "waiting"],
+            description="Process State:",
+            style={"description_width": "initial"},
+            disabled=False,
+        )
+        tr.dlink((process_state_widget, "value"), (process_list, "process_states"))
         process_list.update()
 
-
-        super().__init__(children=[ipw.HBox([past_days_widget, all_days_checkbox]), process_state_widget, process_list])
-
+        super().__init__(
+            children=[
+                ipw.HBox([past_days_widget, all_days_checkbox]),
+                process_state_widget,
+                process_list,
+            ]
+        )
 
 
 class GroupControlWidget(ipw.VBox):
@@ -98,7 +117,9 @@ def __init__(self):
 class StatusControlWidget(ipw.HTML):
     def __init__(self):
         print("AiiDA status")
-        print(subprocess.run(["verdi", "status"], capture_output=True, text=True).stdout)
+        print(
+            subprocess.run(["verdi", "status"], capture_output=True, text=True, check=False).stdout
+        )
         super().__init__()