diff --git a/qutebrowser/browser/adblock.py b/qutebrowser/browser/adblock.py
index 447c500a9..0b02edc7e 100644
--- a/qutebrowser/browser/adblock.py
+++ b/qutebrowser/browser/adblock.py
@@ -215,7 +215,8 @@ class HostBlocker:
                                                 auto_remove=True)
                 self._in_progress.append(download)
                 download.finished.connect(
-                    functools.partial(self.on_download_finished, download, win_id))
+                    functools.partial(self.on_download_finished, download,
+                                      win_id))
 
     def _merge_file(self, byte_io):
         """Read and merge host files.
diff --git a/qutebrowser/browser/browsertab.py b/qutebrowser/browser/browsertab.py
index 811c84fba..58fb117c9 100644
--- a/qutebrowser/browser/browsertab.py
+++ b/qutebrowser/browser/browsertab.py
@@ -57,7 +57,7 @@ def create(win_id, parent=None):
 
 def init(args):
     """Initialize backend-specific modules."""
-    if objreg.get('args').backend == 'webengine':
+    if args.backend == 'webengine':
         from qutebrowser.browser.webengine import webenginetab
         webenginetab.init()
     else:
diff --git a/qutebrowser/browser/webengine/interceptor.py b/qutebrowser/browser/webengine/interceptor.py
index 82ee73f77..918d10fe3 100644
--- a/qutebrowser/browser/webengine/interceptor.py
+++ b/qutebrowser/browser/webengine/interceptor.py
@@ -19,8 +19,9 @@
 
 """A request interceptor taking care of adblocking and custom headers."""
 
-from PyQt5.QtWidgets import QApplication
+# pylint: disable=no-name-in-module,import-error,useless-suppression
 from PyQt5.QtWebEngineCore import QWebEngineUrlRequestInterceptor
+# pylint: enable=no-name-in-module,import-error,useless-suppression
 
 from qutebrowser.browser import shared
 from qutebrowser.utils import utils, log