diff --git a/debug_toolbar/_compat.py b/debug_toolbar/_compat.py
index ecd8fe068..7f3779650 100644
--- a/debug_toolbar/_compat.py
+++ b/debug_toolbar/_compat.py
@@ -1,5 +1,6 @@
 try:
     from django.contrib.auth.decorators import login_not_required
 except ImportError:
+
     def login_not_required(func):
         return func
diff --git a/debug_toolbar/decorators.py b/debug_toolbar/decorators.py
index 5dfd0796f..787282706 100644
--- a/debug_toolbar/decorators.py
+++ b/debug_toolbar/decorators.py
@@ -5,6 +5,7 @@
 
 from debug_toolbar import settings as dt_settings
 
+
 def require_show_toolbar(view):
     @functools.wraps(view)
     def inner(request, *args, **kwargs):
diff --git a/debug_toolbar/panels/history/views.py b/debug_toolbar/panels/history/views.py
index 1e0d4d261..fb6e28c93 100644
--- a/debug_toolbar/panels/history/views.py
+++ b/debug_toolbar/panels/history/views.py
@@ -6,6 +6,7 @@
 from debug_toolbar.panels.history.forms import HistoryStoreForm
 from debug_toolbar.toolbar import DebugToolbar
 
+
 @login_not_required
 @require_show_toolbar
 @render_with_toolbar_language
@@ -37,6 +38,7 @@ def history_sidebar(request):
         return JsonResponse(context)
     return HttpResponseBadRequest("Form errors")
 
+
 @login_not_required
 @require_show_toolbar
 @render_with_toolbar_language