diff --git a/briar-gtk/briar_gtk/actions/window.py b/briar-gtk/briar_gtk/actions/window.py
index c6908c43fc6a815a1c0b423bb9fa48953c966562..b18d7c596e257b955bda3dc14362b6cc2bcd352f 100644
--- a/briar-gtk/briar_gtk/actions/window.py
+++ b/briar-gtk/briar_gtk/actions/window.py
@@ -64,7 +64,8 @@ class WindowActions(Actions):
 
     # pylint: disable=unused-argument
     def _back_to_sidebar(self, action, parameter):
-        if isinstance(self.widget.main_window_controller, MainWindowController):
+        if isinstance(self.widget.main_window_controller,
+                      MainWindowController):
             self.widget.main_window_controller.close_private_chat()
 
     # pylint: disable=unused-argument
diff --git a/briar-gtk/briar_gtk/controllers/private_chat.py b/briar-gtk/briar_gtk/controllers/private_chat.py
index 45e98a726f466e9e32f7f8d6700611684612a7e7..edccf2e7759309cb295bdd278fd75d7c493b6b7f 100644
--- a/briar-gtk/briar_gtk/controllers/private_chat.py
+++ b/briar-gtk/briar_gtk/controllers/private_chat.py
@@ -12,10 +12,12 @@ from briar_gtk.define import APP
 from briar_gtk.widgets.edit_dialog import EditDialog
 
 
+# pylint: disable=too-many-arguments
 class PrivateChatController:
     _current_contact_id = 0
 
-    def __init__(self, contact_id, private_chat_view, sidebar_controller, builder, api):
+    def __init__(self, contact_id, private_chat_view, sidebar_controller,
+                 builder, api):
         self._private_chat_view = private_chat_view
         self._sidebar_controller = sidebar_controller
         self._builder = builder
diff --git a/briar-gtk/briar_gtk/handlers/__init__.py b/briar-gtk/briar_gtk/handlers/__init__.py
index 149bae6061565cff5272eaf7ba11eef24db400b0..57c15133254824c77ba5f6aeafd3dcd46351ad0e 100644
--- a/briar-gtk/briar_gtk/handlers/__init__.py
+++ b/briar-gtk/briar_gtk/handlers/__init__.py
@@ -2,5 +2,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 # License-Filename: LICENSE.md
 """
-Similar to controllers, handlers react to input, but they aren't attached to a view
+Similar to controllers, handlers react to input, but they aren't attached
+to a view
 """
diff --git a/briar-gtk/briar_gtk/views/private_chat.py b/briar-gtk/briar_gtk/views/private_chat.py
index 73ffea7dffb45249d4b424946967ea8b1af5f7b2..24d3bd7d2b10e374bb989bf38c28b3b257afb59c 100644
--- a/briar-gtk/briar_gtk/views/private_chat.py
+++ b/briar-gtk/briar_gtk/views/private_chat.py
@@ -15,6 +15,7 @@ from briar_gtk.define import APP, RESOURCES_DIR
 from briar_gtk.widgets.private_message import PrivateMessageWidget
 
 
+# pylint: disable=too-many-instance-attributes
 class PrivateChatView(Gtk.Overlay):
 
     CONTAINER_UI = "private_chat.ui"