diff --git a/picard/acoustid/__init__.py b/picard/acoustid/__init__.py
index 25b60f9f1..d718fc69a 100644
--- a/picard/acoustid/__init__.py
+++ b/picard/acoustid/__init__.py
@@ -29,7 +29,7 @@ from picard.acoustid.json_helpers import parse_recording
 class AcoustIDClient(QtCore.QObject):
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        super().__init__()
         self._queue = deque()
         self._running = 0
         self._max_processes = 2
diff --git a/picard/acoustid/manager.py b/picard/acoustid/manager.py
index dfaac82db..528c0219c 100644
--- a/picard/acoustid/manager.py
+++ b/picard/acoustid/manager.py
@@ -36,7 +36,7 @@ class Submission(object):
 class AcoustIDManager(QtCore.QObject):
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        super().__init__()
         self._fingerprints = {}
 
     def add(self, file, recordingid):
diff --git a/picard/album.py b/picard/album.py
index c075d03fd..84356d251 100644
--- a/picard/album.py
+++ b/picard/album.py
@@ -50,7 +50,7 @@ register_album_metadata_processor(coverart)
 
 class AlbumArtist(DataObject):
     def __init__(self, album_artist_id):
-        DataObject.__init__(self, album_artist_id)
+        super().__init__(album_artist_id)
 
 
 class Album(DataObject, Item):
diff --git a/picard/browser/browser.py b/picard/browser/browser.py
index d377ec969..e94cc0630 100644
--- a/picard/browser/browser.py
+++ b/picard/browser/browser.py
@@ -26,7 +26,7 @@ class BrowserIntegration(QtNetwork.QTcpServer):
     """Simple HTTP server for web browser integration."""
 
     def __init__(self, parent=None):
-        QtNetwork.QTcpServer.__init__(self, parent)
+        super().__init__(parent)
         self.newConnection.connect(self._accept_connection)
         self.port = 0
         self.host_address = None
diff --git a/picard/coverart/image.py b/picard/coverart/image.py
index 8417e90d5..5a7316637 100644
--- a/picard/coverart/image.py
+++ b/picard/coverart/image.py
@@ -362,8 +362,7 @@ class CaaCoverArtImage(CoverArtImage):
     sourceprefix = "CAA"
 
     def __init__(self, url, types=None, is_front=False, comment='', data=None):
-        CoverArtImage.__init__(self, url=url, types=types, comment=comment,
-                               data=data)
+        super().__init__(url=url, types=types, comment=comment, data=data)
         self.is_front = is_front
 
 
@@ -373,8 +372,7 @@ class CaaThumbnailCoverArtImage(CaaCoverArtImage):
     property"""
 
     def __init__(self, url, types=None, is_front=False, comment='', data=None):
-        CaaCoverArtImage.__init__(self, url=url, types=types, comment=comment,
-                                  data=data)
+        super().__init__(url=url, types=types, comment=comment, data=data)
         self.is_front = False
         self.can_be_saved_to_disk = False
         self.can_be_saved_to_tags = False
@@ -387,8 +385,7 @@ class TagCoverArtImage(CoverArtImage):
 
     def __init__(self, file, tag=None, types=None, is_front=None,
                  support_types=False, comment='', data=None):
-        CoverArtImage.__init__(self, url=None, types=types, comment=comment,
-                               data=data)
+        super().__init__(url=None, types=types, comment=comment, data=data)
         self.sourcefile = file
         self.tag = tag
         self.support_types = support_types
@@ -423,8 +420,7 @@ class CoverArtImageFromFile(CoverArtImage):
 
     def __init__(self, filepath, types=None, is_front=None,
                  support_types=False, comment='', data=None):
-        CoverArtImage.__init__(self, url=None, types=types, comment=comment,
-                               data=data)
+        super().__init__(url=None, types=types, comment=comment, data=data)
         self.filepath = filepath
         self.support_types = support_types
         if is_front is not None:
diff --git a/picard/coverart/providers/caa.py b/picard/coverart/providers/caa.py
index 0e3cfd26b..929491f2f 100644
--- a/picard/coverart/providers/caa.py
+++ b/picard/coverart/providers/caa.py
@@ -232,7 +232,7 @@ class CoverArtProviderCaa(CoverArtProvider):
     coverartimage_thumbnail_class = CaaThumbnailCoverArtImage
 
     def __init__(self, coverart):
-        CoverArtProvider.__init__(self, coverart)
+        super().__init__(coverart)
         self.caa_types = list(map(str.lower, config.setting["caa_image_types"]))
         self.len_caa_types = len(self.caa_types)
         self.restrict_types = config.setting["caa_restrict_image_types"]
diff --git a/picard/dataobj.py b/picard/dataobj.py
index 24f56123b..31d4e9602 100644
--- a/picard/dataobj.py
+++ b/picard/dataobj.py
@@ -23,7 +23,7 @@ from picard.util import LockableObject
 class DataObject(LockableObject):
 
     def __init__(self, obj_id):
-        LockableObject.__init__(self)
+        super().__init__()
         self.id = obj_id
         self.folksonomy_tags = {}
         self.item = None
diff --git a/picard/disc.py b/picard/disc.py
index 65eda324b..7a4746427 100644
--- a/picard/disc.py
+++ b/picard/disc.py
@@ -38,7 +38,7 @@ from picard.ui.cdlookup import CDLookupDialog
 class Disc(QtCore.QObject):
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        super().__init__()
         self.id = None
         self.submission_url = None
 
diff --git a/picard/plugin.py b/picard/plugin.py
index 8bdbf863b..b33fdd4a9 100644
--- a/picard/plugin.py
+++ b/picard/plugin.py
@@ -242,7 +242,7 @@ class PluginManager(QtCore.QObject):
     plugin_updated = QtCore.pyqtSignal(str, bool)
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        super().__init__()
         self.plugins = []
         self._api_versions = set([version_from_string(v) for v in picard.api_versions])
         self._available_plugins = {}
diff --git a/picard/releasegroup.py b/picard/releasegroup.py
index 26aeb1e26..316267c66 100644
--- a/picard/releasegroup.py
+++ b/picard/releasegroup.py
@@ -31,7 +31,7 @@ from picard.util import uniqify
 class ReleaseGroup(DataObject):
 
     def __init__(self, rg_id):
-        DataObject.__init__(self, rg_id)
+        super().__init__(rg_id)
         self.metadata = Metadata()
         self.loaded = False
         self.versions = []
diff --git a/picard/tagger.py b/picard/tagger.py
index 78e8d1717..1a2eecfb9 100644
--- a/picard/tagger.py
+++ b/picard/tagger.py
@@ -110,7 +110,7 @@ class Tagger(QtWidgets.QApplication):
 
         # Set the WM_CLASS to 'MusicBrainz-Picard' so desktop environments
         # can use it to look up the app
-        QtWidgets.QApplication.__init__(self, ['MusicBrainz-Picard'] + unparsed_args)
+        super().__init__(['MusicBrainz-Picard'] + unparsed_args)
         self.__class__.__instance = self
         config._setup(self, picard_args.config_file)
 
diff --git a/picard/track.py b/picard/track.py
index 5bcd75880..add7c8312 100644
--- a/picard/track.py
+++ b/picard/track.py
@@ -41,7 +41,7 @@ _TRANSLATE_TAGS = {
 
 class TrackArtist(DataObject):
     def __init__(self, ta_id):
-        DataObject.__init__(self, ta_id)
+        super().__init__(ta_id)
 
 
 class Track(DataObject, Item):
@@ -242,7 +242,7 @@ class Track(DataObject, Item):
 class NonAlbumTrack(Track):
 
     def __init__(self, nat_id):
-        Track.__init__(self, nat_id, self.tagger.nats)
+        super().__init__(nat_id, self.tagger.nats)
         self.callback = None
         self.loaded = False
 
diff --git a/picard/ui/__init__.py b/picard/ui/__init__.py
index 718218fa3..c29407126 100644
--- a/picard/ui/__init__.py
+++ b/picard/ui/__init__.py
@@ -27,7 +27,7 @@ class PicardDialog(QtWidgets.QDialog):
     flags = QtCore.Qt.WindowSystemMenuHint | QtCore.Qt.WindowTitleHint
 
     def __init__(self, parent=None):
-        QtWidgets.QDialog.__init__(self, parent, self.flags)
+        super().__init__(parent, self.flags)
 
 
 # With py3, QObjects are no longer hashable unless they have
diff --git a/picard/ui/cdlookup.py b/picard/ui/cdlookup.py
index cebdd1c89..f58cafc6b 100644
--- a/picard/ui/cdlookup.py
+++ b/picard/ui/cdlookup.py
@@ -39,7 +39,7 @@ class CDLookupDialog(PicardDialog):
     ]
 
     def __init__(self, releases, disc, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
         self.releases = releases
         self.disc = disc
         self.ui = Ui_Dialog()
diff --git a/picard/ui/collectionmenu.py b/picard/ui/collectionmenu.py
index f24fbaf64..bcad662dc 100644
--- a/picard/ui/collectionmenu.py
+++ b/picard/ui/collectionmenu.py
@@ -26,7 +26,7 @@ from picard.collection import user_collections, load_user_collections
 class CollectionMenu(QtWidgets.QMenu):
 
     def __init__(self, albums, *args):
-        QtWidgets.QMenu.__init__(self, *args)
+        super().__init__(*args)
         self.ids = set(a.id for a in albums)
         self.update_collections()
 
@@ -56,7 +56,7 @@ class CollectionCheckBox(QtWidgets.QCheckBox):
     def __init__(self, menu, collection):
         self.menu = menu
         self.collection = collection
-        QtWidgets.QCheckBox.__init__(self, self.label())
+        super().__init__(self.label())
 
         releases = collection.releases & menu.ids
         if len(releases) == len(menu.ids):
diff --git a/picard/ui/coverartbox.py b/picard/ui/coverartbox.py
index da4db1ec8..c848e7061 100644
--- a/picard/ui/coverartbox.py
+++ b/picard/ui/coverartbox.py
@@ -37,7 +37,7 @@ class ActiveLabel(QtWidgets.QLabel):
     image_dropped = QtCore.pyqtSignal(QtCore.QUrl, QtCore.QByteArray)
 
     def __init__(self, active=True, drops=False, *args):
-        QtWidgets.QLabel.__init__(self, *args)
+        super().__init__(*args)
         self.setMargin(0)
         self.setActive(active)
         self.setAcceptDrops(drops)
@@ -270,7 +270,7 @@ def set_image_append(obj, coverartimage):
 class CoverArtBox(QtWidgets.QGroupBox):
 
     def __init__(self, parent):
-        QtWidgets.QGroupBox.__init__(self, "")
+        super().__init__("")
         self.layout = QtWidgets.QVBoxLayout()
         self.layout.setSpacing(6)
         self.parent = parent
diff --git a/picard/ui/edittagdialog.py b/picard/ui/edittagdialog.py
index fd050f430..57692d67c 100644
--- a/picard/ui/edittagdialog.py
+++ b/picard/ui/edittagdialog.py
@@ -26,7 +26,7 @@ from picard.ui.ui_edittagdialog import Ui_EditTagDialog
 class EditTagDialog(PicardDialog):
 
     def __init__(self, window, tag):
-        PicardDialog.__init__(self, window)
+        super().__init__(window)
         self.ui = Ui_EditTagDialog()
         self.ui.setupUi(self)
         self.window = window
diff --git a/picard/ui/filebrowser.py b/picard/ui/filebrowser.py
index effe737d2..cc4e25bcb 100644
--- a/picard/ui/filebrowser.py
+++ b/picard/ui/filebrowser.py
@@ -34,7 +34,7 @@ class FileBrowser(QtWidgets.QTreeView):
     ]
 
     def __init__(self, parent):
-        QtWidgets.QTreeView.__init__(self, parent)
+        super().__init__(parent)
         self.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
         self.setDragEnabled(True)
         self.move_files_here_action = QtWidgets.QAction(_("&Move Tagged Files Here"), self)
diff --git a/picard/ui/infodialog.py b/picard/ui/infodialog.py
index 7bf4903dc..12b846417 100644
--- a/picard/ui/infodialog.py
+++ b/picard/ui/infodialog.py
@@ -34,7 +34,7 @@ from picard.ui.ui_infodialog import Ui_InfoDialog
 
 class ArtworkTable(QtWidgets.QTableWidget):
     def __init__(self, display_existing_art):
-        QtWidgets.QTableWidget.__init__(self, 0, 2)
+        super().__init__(0, 2)
         self.display_existing_art = display_existing_art
         h_header = self.horizontalHeader()
         v_header = self.verticalHeader()
@@ -98,7 +98,7 @@ class ArtworkTable(QtWidgets.QTableWidget):
 class InfoDialog(PicardDialog):
 
     def __init__(self, obj, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
         self.obj = obj
         self.images = []
         self.existing_images = []
diff --git a/picard/ui/itemviews.py b/picard/ui/itemviews.py
index 7fde72ff7..eee8244bb 100644
--- a/picard/ui/itemviews.py
+++ b/picard/ui/itemviews.py
@@ -37,7 +37,7 @@ class BaseAction(QtWidgets.QAction):
     MENU = []
 
     def __init__(self):
-        QtWidgets.QAction.__init__(self, self.NAME, None)
+        super().__init__(self.NAME, None)
         self.triggered.connect(self.__callback)
 
     def __callback(self):
@@ -97,7 +97,7 @@ class MainPanel(QtWidgets.QSplitter):
     ]
 
     def __init__(self, window, parent=None):
-        QtWidgets.QSplitter.__init__(self, parent)
+        super().__init__(parent)
         self.window = window
         self.create_icons()
         self.views = [FileTreeView(window, self), AlbumTreeView(window, self)]
@@ -221,7 +221,7 @@ class BaseTreeView(QtWidgets.QTreeWidget):
     ]
 
     def __init__(self, window, parent=None):
-        QtWidgets.QTreeWidget.__init__(self, parent)
+        super().__init__(parent)
         self.window = window
         self.panel = parent
 
@@ -551,7 +551,7 @@ class FileTreeView(BaseTreeView):
     view_sizes = config.TextOption("persist", "file_view_sizes", "250 40 100")
 
     def __init__(self, window, parent=None):
-        BaseTreeView.__init__(self, window, parent)
+        super().__init__(window, parent)
         self.setAccessibleName(_("file view"))
         self.setAccessibleDescription(_("Contains unmatched files and clusters"))
         self.unmatched_files = ClusterItem(self.tagger.unclustered_files, False, self)
@@ -581,7 +581,7 @@ class AlbumTreeView(BaseTreeView):
     view_sizes = config.TextOption("persist", "album_view_sizes", "250 40 100")
 
     def __init__(self, window, parent=None):
-        BaseTreeView.__init__(self, window, parent)
+        super().__init__(window, parent)
         self.setAccessibleName(_("album view"))
         self.setAccessibleDescription(_("Contains albums and matched files"))
         self.tagger.album_added.connect(self.add_album)
@@ -607,7 +607,7 @@ class TreeItem(QtWidgets.QTreeWidgetItem):
     __lt__ = lambda self, other: False
 
     def __init__(self, obj, sortable, *args):
-        QtWidgets.QTreeWidgetItem.__init__(self, *args)
+        super().__init__(*args)
         self.obj = obj
         if obj is not None:
             obj.item = self
@@ -625,7 +625,7 @@ class TreeItem(QtWidgets.QTreeWidgetItem):
 class ClusterItem(TreeItem):
 
     def __init__(self, *args):
-        TreeItem.__init__(self, *args)
+        super().__init__(*args)
         self.setIcon(0, ClusterItem.icon_dir)
 
     def update(self):
diff --git a/picard/ui/mainwindow.py b/picard/ui/mainwindow.py
index 7542b4fa4..735002917 100644
--- a/picard/ui/mainwindow.py
+++ b/picard/ui/mainwindow.py
@@ -75,7 +75,7 @@ class MainWindow(QtWidgets.QMainWindow):
     ]
 
     def __init__(self, parent=None):
-        QtWidgets.QMainWindow.__init__(self, parent)
+        super().__init__(parent)
         self.selected_objects = []
         self.ignore_selection_changes = False
         self.toolbar = None
diff --git a/picard/ui/metadatabox.py b/picard/ui/metadatabox.py
index 883717c53..d2f6f9bac 100644
--- a/picard/ui/metadatabox.py
+++ b/picard/ui/metadatabox.py
@@ -151,7 +151,7 @@ class MetadataBox(QtWidgets.QTableWidget):
     )
 
     def __init__(self, parent):
-        QtWidgets.QTableWidget.__init__(self, parent)
+        super().__init__(parent)
         self.parent = parent
         self.setAccessibleName(_("metadata view"))
         self.setAccessibleDescription(_("Displays original and new tags for the selected files"))
diff --git a/picard/ui/options/dialog.py b/picard/ui/options/dialog.py
index e829efd37..6e4b6f9a2 100644
--- a/picard/ui/options/dialog.py
+++ b/picard/ui/options/dialog.py
@@ -73,7 +73,7 @@ class OptionsDialog(PicardDialog):
             self.default_item = items[0]
 
     def __init__(self, default_page=None, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
 
         from picard.ui.ui_options import Ui_Dialog
         self.ui = Ui_Dialog()
diff --git a/picard/ui/options/scripting.py b/picard/ui/options/scripting.py
index 1730d1482..69704c884 100644
--- a/picard/ui/options/scripting.py
+++ b/picard/ui/options/scripting.py
@@ -33,7 +33,7 @@ DEFAULT_SCRIPT_NAME = N_("My script")
 class TaggerScriptSyntaxHighlighter(QtGui.QSyntaxHighlighter):
 
     def __init__(self, document):
-        QtGui.QSyntaxHighlighter.__init__(self, document)
+        super().__init__(document)
         self.func_re = QtCore.QRegExp(r"\$(?!noop)[a-zA-Z][_a-zA-Z0-9]*\(")
         self.func_fmt = QtGui.QTextCharFormat()
         self.func_fmt.setFontWeight(QtGui.QFont.Bold)
diff --git a/picard/ui/passworddialog.py b/picard/ui/passworddialog.py
index 89ae2819a..83506b3b9 100644
--- a/picard/ui/passworddialog.py
+++ b/picard/ui/passworddialog.py
@@ -26,7 +26,7 @@ from picard.ui.ui_passworddialog import Ui_PasswordDialog
 class PasswordDialog(PicardDialog):
 
     def __init__(self, authenticator, reply, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
         self._authenticator = authenticator
         self.ui = Ui_PasswordDialog()
         self.ui.setupUi(self)
@@ -46,7 +46,7 @@ class PasswordDialog(PicardDialog):
 class ProxyDialog(PicardDialog):
 
     def __init__(self, authenticator, proxy, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
         self._authenticator = authenticator
         self._proxy = proxy
         self.ui = Ui_PasswordDialog()
diff --git a/picard/ui/ratingwidget.py b/picard/ui/ratingwidget.py
index 43a8766bc..f09648286 100644
--- a/picard/ui/ratingwidget.py
+++ b/picard/ui/ratingwidget.py
@@ -24,7 +24,7 @@ from picard import config
 class RatingWidget(QtWidgets.QWidget):
 
     def __init__(self, parent, track):
-        QtWidgets.QWidget.__init__(self, parent)
+        super().__init__(parent)
         self._track = track
         self._maximum = config.setting["rating_steps"] - 1
         self._rating = int(track.metadata["~rating"] or 0)
diff --git a/picard/ui/tagsfromfilenames.py b/picard/ui/tagsfromfilenames.py
index 1533ae991..dfb35c7b5 100644
--- a/picard/ui/tagsfromfilenames.py
+++ b/picard/ui/tagsfromfilenames.py
@@ -36,7 +36,7 @@ class TagsFromFileNamesDialog(PicardDialog):
     ]
 
     def __init__(self, files, parent=None):
-        PicardDialog.__init__(self, parent)
+        super().__init__(parent)
         self.ui = Ui_TagsFromFileNamesDialog()
         self.ui.setupUi(self)
         items = [
diff --git a/picard/ui/util.py b/picard/ui/util.py
index eb5690d99..cc2db640a 100644
--- a/picard/ui/util.py
+++ b/picard/ui/util.py
@@ -43,7 +43,7 @@ class StandardButton(QtWidgets.QPushButton):
             if hasattr(QtWidgets.QStyle, iconname):
                 icon = self.tagger.style().standardIcon(getattr(QtWidgets.QStyle, iconname))
                 args = [icon, label]
-        QtWidgets.QPushButton.__init__(self, *args)
+        super().__init__(*args)
 
 
 # The following code is there to fix
@@ -68,7 +68,7 @@ def find_starting_directory():
 class ButtonLineEdit(QtWidgets.QLineEdit):
 
     def __init__(self, parent=None):
-        QtWidgets.QLineEdit.__init__(self, parent)
+        super().__init__(parent)
 
         self.clear_button = QtWidgets.QToolButton(self)
         self.clear_button.setVisible(False)
diff --git a/picard/util/__init__.py b/picard/util/__init__.py
index 0e27f1154..88824c3a9 100644
--- a/picard/util/__init__.py
+++ b/picard/util/__init__.py
@@ -45,7 +45,7 @@ class LockableObject(QtCore.QObject):
     """Read/write lockable object."""
 
     def __init__(self):
-        QtCore.QObject.__init__(self)
+        super().__init__()
         self.__lock = QtCore.QReadWriteLock()
 
     def lock_for_read(self):
diff --git a/picard/util/thread.py b/picard/util/thread.py
index 62fe6fe3b..edf01dbbd 100644
--- a/picard/util/thread.py
+++ b/picard/util/thread.py
@@ -25,7 +25,7 @@ from PyQt5.QtCore import QRunnable, QCoreApplication, QEvent
 class ProxyToMainEvent(QEvent):
 
     def __init__(self, func, *args, **kwargs):
-        QEvent.__init__(self, QEvent.User)
+        super().__init__(QEvent.User)
         self.func = func
         self.args = args
         self.kwargs = kwargs
@@ -37,7 +37,7 @@ class ProxyToMainEvent(QEvent):
 class Runnable(QRunnable):
 
     def __init__(self, func, next_func, traceback=True):
-        QRunnable.__init__(self)
+        super().__init__()
         self.func = func
         self.next_func = next_func
         self.traceback = traceback