diff --git a/participation/models.py b/participation/models.py
index 001e050..e388c99 100644
--- a/participation/models.py
+++ b/participation/models.py
@@ -1,7 +1,6 @@
 # Copyright (C) 2020 by Animath
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-import asyncio
 from datetime import date
 import os
 
@@ -16,7 +15,6 @@ from django.utils.crypto import get_random_string
 from django.utils.text import format_lazy
 from django.utils.translation import gettext_lazy as _
 import gspread
-from django.views.debug import ExceptionReporter
 from gspread.utils import a1_range_to_grid_range, MergeType
 from registration.models import Payment, VolunteerRegistration
 from tfjm.lists import get_sympa_client
@@ -434,7 +432,7 @@ class Tournament(models.Model):
         gc = gspread.service_account_from_dict(settings.GOOGLE_SERVICE_CLIENT)
         spreadsheet = gc.open_by_key(self.notes_sheet_id)
         worksheets = spreadsheet.worksheets()
-        if f"Classement final" not in [ws.title for ws in worksheets]:
+        if "Classement final" not in [ws.title for ws in worksheets]:
             worksheet = spreadsheet.add_worksheet("Classement final", 100, 26)
         else:
             worksheet = spreadsheet.worksheet("Classement final")
@@ -477,7 +475,6 @@ class Tournament(models.Model):
         data = header + lines + final_ranking
         worksheet.update(data, f"A1:G{participations.count() + 5}", raw=False)
 
-
         format_requests = []
 
         # Set the width of the columns
@@ -536,7 +533,7 @@ class Tournament(models.Model):
 
         # Set background color for headers and footers
         bg_colors = [("A1:AF", (1, 1, 1)),
-                     (f"A1:G1", (0.8, 0.8, 0.8)),
+                     ("A1:G1", (0.8, 0.8, 0.8)),
                      (f"A2:B{participations.count() + 1}", (0.9, 0.9, 0.9)),
                      (f"C2:C{participations.count() + 1}", (1, 1, 1)),
                      (f"D2:D{participations.count() + 1}", (0.9, 0.9, 0.9)),
@@ -581,7 +578,7 @@ class Tournament(models.Model):
             })
 
         # Protect the header, the juries list, the footer and the ranking
-        protected_ranges = [f"A1:G1", f"A2:B{participations.count() + 1}",
+        protected_ranges = ["A1:G1", f"A2:B{participations.count() + 1}",
                             f"D2:D{participations.count() + 1}", f"F2:G{participations.count() + 1}",
                             f"A{participations.count() + 4}:C{2 * participations.count() + 4}", ]
         for protected_range in protected_ranges:
@@ -1214,7 +1211,8 @@ class Pool(models.Model):
                 note.save()
 
     def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
-        self.update_juries_lines_spreadsheet()
+        if os.getenv('GOOGLE_PRIVATE_KEY_ID', None):  # Google Sheets support is enabled
+            self.update_juries_lines_spreadsheet()
         super().save(force_insert, force_update, using, update_fields)
 
     def __str__(self):
diff --git a/participation/urls.py b/participation/urls.py
index d58167a..2634262 100644
--- a/participation/urls.py
+++ b/participation/urls.py
@@ -11,7 +11,7 @@ from .views import CreateTeamView, FinalNotationSheetTemplateView, JoinTeamView,
     ScaleNotationSheetTemplateView, SolutionsDownloadView, SolutionUploadView, SynthesisUploadView, \
     TeamAuthorizationsView, TeamDetailView, TeamLeaveView, TeamListView, TeamUpdateView, \
     TeamUploadMotivationLetterView, TournamentCreateView, TournamentDetailView, TournamentExportCSVView, \
-    TournamentHarmonizeView, TournamentHarmonizeNoteView, TournamentListView, TournamentPaymentsView, \
+    TournamentHarmonizeNoteView, TournamentHarmonizeView, TournamentListView, TournamentPaymentsView, \
     TournamentPublishNotesView, TournamentUpdateView
 
 
diff --git a/participation/views.py b/participation/views.py
index b6fb4e4..8491d36 100644
--- a/participation/views.py
+++ b/participation/views.py
@@ -9,7 +9,6 @@ from tempfile import mkdtemp
 from typing import Any, Dict
 from zipfile import ZipFile
 
-import gspread
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.mixins import LoginRequiredMixin
@@ -29,6 +28,7 @@ from django.views.generic import CreateView, DetailView, FormView, RedirectView,
 from django.views.generic.detail import SingleObjectMixin
 from django.views.generic.edit import FormMixin, ProcessFormView
 from django_tables2 import MultiTableMixin, SingleTableMixin, SingleTableView
+import gspread
 from magic import Magic
 from odf.opendocument import OpenDocumentSpreadsheet
 from odf.style import Style, TableCellProperties, TableColumnProperties, TextProperties