diff --git a/qutebrowser/browser/downloads.py b/qutebrowser/browser/downloads.py
index 6cdcfe9e3..a03faa07f 100644
--- a/qutebrowser/browser/downloads.py
+++ b/qutebrowser/browser/downloads.py
@@ -1228,7 +1228,8 @@ class DownloadManager(QAbstractListModel):
     def flags(self, _index):
         """Override flags so items aren't selectable.
 
-        The default would be Qt.ItemIsEnabled | Qt.ItemIsSelectable."""
+        The default would be Qt.ItemIsEnabled | Qt.ItemIsSelectable.
+        """
         return Qt.ItemIsEnabled | Qt.ItemNeverHasChildren
 
     def rowCount(self, parent=QModelIndex()):
diff --git a/qutebrowser/commands/runners.py b/qutebrowser/commands/runners.py
index d03486570..fbd7b1b22 100644
--- a/qutebrowser/commands/runners.py
+++ b/qutebrowser/commands/runners.py
@@ -261,7 +261,8 @@ class CommandRunner(QObject):
         """Run a command and display exceptions in the statusbar.
 
         Contrary to run_safely, error messages are queued so this is more
-        suitable to use while initializing."""
+        suitable to use while initializing.
+        """
         try:
             self.run(text, count)
         except (cmdexc.CommandMetaError, cmdexc.CommandError) as e:
diff --git a/qutebrowser/completion/models/miscmodels.py b/qutebrowser/completion/models/miscmodels.py
index 400ea2568..3b71a6548 100644
--- a/qutebrowser/completion/models/miscmodels.py
+++ b/qutebrowser/completion/models/miscmodels.py
@@ -147,7 +147,8 @@ class TabCompletionModel(base.BaseCompletionModel):
 
     """A model to complete on open tabs across all windows.
 
-    Used for switching the buffer command."""
+    Used for switching the buffer command.
+    """
 
     # https://github.com/The-Compiler/qutebrowser/issues/545
     # pylint: disable=abstract-method
diff --git a/qutebrowser/completion/models/urlmodel.py b/qutebrowser/completion/models/urlmodel.py
index b31ab9809..244bb1395 100644
--- a/qutebrowser/completion/models/urlmodel.py
+++ b/qutebrowser/completion/models/urlmodel.py
@@ -32,7 +32,8 @@ class UrlCompletionModel(base.BaseCompletionModel):
 
     """A model which combines bookmarks, quickmarks and web history URLs.
 
-    Used for the `open` command."""
+    Used for the `open` command.
+    """
 
     # https://github.com/The-Compiler/qutebrowser/issues/545
     # pylint: disable=abstract-method
diff --git a/qutebrowser/misc/crashdialog.py b/qutebrowser/misc/crashdialog.py
index 3c4ab03d4..19413a297 100644
--- a/qutebrowser/misc/crashdialog.py
+++ b/qutebrowser/misc/crashdialog.py
@@ -198,7 +198,8 @@ class _CrashDialog(QDialog):
     def _init_text(self):
         """Initialize the main text to be displayed on an exception.
 
-        Should be extended by subclasses to set the actual text."""
+        Should be extended by subclasses to set the actual text.
+        """
         self._lbl = QLabel(wordWrap=True, openExternalLinks=True,
                            textInteractionFlags=Qt.LinksAccessibleByMouse)
         self._vbox.addWidget(self._lbl)
diff --git a/qutebrowser/misc/earlyinit.py b/qutebrowser/misc/earlyinit.py
index 969a40368..7507bc59e 100644
--- a/qutebrowser/misc/earlyinit.py
+++ b/qutebrowser/misc/earlyinit.py
@@ -267,7 +267,8 @@ def remove_inputhook():
     """Remove the PyQt input hook.
 
     Doing this means we can't use the interactive shell anymore (which we don't
-    anyways), but we can use pdb instead."""
+    anyways), but we can use pdb instead.
+    """
     from PyQt5.QtCore import pyqtRemoveInputHook
     pyqtRemoveInputHook()
 
diff --git a/scripts/dev/update_3rdparty.py b/scripts/dev/update_3rdparty.py
index f53135a99..16e604c84 100755
--- a/scripts/dev/update_3rdparty.py
+++ b/scripts/dev/update_3rdparty.py
@@ -31,7 +31,8 @@ import os
 def get_latest_pdfjs_url():
     """Get the URL of the latest pdf.js prebuilt package.
 
-    Returns a (version, url)-tuple."""
+    Returns a (version, url)-tuple.
+    """
     github_api = 'https://api.github.com'
     endpoint = 'repos/mozilla/pdf.js/releases/latest'
     request_url = '{}/{}'.format(github_api, endpoint)
diff --git a/setup.cfg b/setup.cfg
index 606640d42..c6df27380 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,6 +31,10 @@ exclude = .venv,.hypothesis,.git,__pycache__,resources.py
 #       (PEP257 got changed, but let's stick to the old standard)
 # D402: First line should not be function's signature (false-positives)
 # FI10 - FI15: __future__ import missing
+# H201: bare except
+# H238: Use new-stule classes
+# H301: one import per line
+# H306: imports not in alphabetical order
 ignore =
     E128,E226,E265,E501,E402,E266,
     F401,
@@ -38,7 +42,8 @@ ignore =
     L101,L102,L103,L201,L202,L203,L204,L207,L302,
     P101,P102,P103,
     D102,D103,D104,D105,D209,D211,D402,
-    FI10,FI11,FI12,FI13,FI14,FI15
+    FI10,FI11,FI12,FI13,FI14,FI15,
+    H201,H238,H301,H306
 max-complexity = 12
 putty-ignore =
     /# pylint: disable=invalid-name/ : +N801,N806
diff --git a/tests/integration/features/conftest.py b/tests/integration/features/conftest.py
index a099a1887..2ff052937 100644
--- a/tests/integration/features/conftest.py
+++ b/tests/integration/features/conftest.py
@@ -326,7 +326,8 @@ def compare_session(quteproc, expected):
 def no_crash():
     """Don't do anything.
 
-    This is actually a NOP as a crash is already checked in the log."""
+    This is actually a NOP as a crash is already checked in the log.
+    """
     pass
 
 
diff --git a/tests/unit/mainwindow/statusbar/test_percentage.py b/tests/unit/mainwindow/statusbar/test_percentage.py
index bba465161..c40603188 100644
--- a/tests/unit/mainwindow/statusbar/test_percentage.py
+++ b/tests/unit/mainwindow/statusbar/test_percentage.py
@@ -46,8 +46,7 @@ def percentage(qtbot):
     (5, '[ 5%]'),
 ])
 def test_percentage_text(percentage, y, expected):
-    """
-    Test text displayed by the widget based on the y position of a page.
+    """Test text displayed by the widget based on the y position of a page.
 
     Args:
         y: y position of the page as an int in the range [0, 100].
diff --git a/tests/unit/misc/test_split.py b/tests/unit/misc/test_split.py
index 272b281ea..7b3c8015a 100644
--- a/tests/unit/misc/test_split.py
+++ b/tests/unit/misc/test_split.py
@@ -104,8 +104,7 @@ foo\ bar/foo bar/foo\ bar/
 
 
 def _parse_split_test_data_str():
-    """
-    Parse the test data set into a namedtuple to use in tests.
+    """Parse the test data set into a namedtuple to use in tests.
 
     Returns:
         A list of namedtuples with str attributes: input, keep, no_keep
diff --git a/tox.ini b/tox.ini
index c66fc9af5..0071cb34f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -161,6 +161,7 @@ deps =
     flake8-tuple==0.2.9
     flake8-tidy-imports==1.0.0
     flake8-future-import==0.3.0
+    hacking==0.10.2
     pep257==0.7.0  # still needed by flake8-docstrings but ignored
     pydocstyle==1.0.0
 commands =