diff --git a/openlp/core/api/deploy.py b/openlp/core/api/deploy.py
index a9889df9c..fe77cc61d 100644
--- a/openlp/core/api/deploy.py
+++ b/openlp/core/api/deploy.py
@@ -39,8 +39,8 @@ def deploy_zipfile(app_root_path, zip_name):
     :return: None
     """
     zip_path = app_root_path / zip_name
-    web_zip = ZipFile(str(zip_path))
-    web_zip.extractall(str(app_root_path))
+    web_zip = ZipFile(zip_path)
+    web_zip.extractall(app_root_path)
 
 
 def download_sha256():
diff --git a/openlp/core/app.py b/openlp/core/app.py
index 8b274e6b7..e0438b8f3 100644
--- a/openlp/core/app.py
+++ b/openlp/core/app.py
@@ -317,8 +317,7 @@ def set_up_logging(log_path):
     """
     create_paths(log_path, do_not_log=True)
     file_path = log_path / 'openlp.log'
-    # TODO: FileHandler accepts a Path object in Py3.6
-    logfile = logging.FileHandler(str(file_path), 'w', encoding='UTF-8')
+    logfile = logging.FileHandler(file_path, 'w', encoding='UTF-8')
     logfile.setFormatter(logging.Formatter('%(asctime)s %(threadName)s %(name)-55s %(levelname)-8s %(message)s'))
     log.addHandler(logfile)
     if log.isEnabledFor(logging.DEBUG):
@@ -364,7 +363,7 @@ def main(args=None):
         portable_settings_path = data_path / 'OpenLP.ini'
         # Make this our settings file
         log.info('INI file: {name}'.format(name=portable_settings_path))
-        Settings.set_filename(str(portable_settings_path))
+        Settings.set_filename(portable_settings_path)
         portable_settings = Settings()
         # Set our data path
         log.info('Data path: {name}'.format(name=data_path))
diff --git a/openlp/core/common/path.py b/openlp/core/common/path.py
index 7f3c156fc..79adbf5b6 100644
--- a/openlp/core/common/path.py
+++ b/openlp/core/common/path.py
@@ -78,7 +78,7 @@ class Path(PathVariant):
         :param onerror: Handler function to handle any errors
         :rtype: None
         """
-        shutil.rmtree(str(self), ignore_errors, onerror)
+        shutil.rmtree(self, ignore_errors, onerror)
 
 
 def replace_params(args, kwargs, params):
diff --git a/openlp/core/lib/db.py b/openlp/core/lib/db.py
index 2e587b8e9..bbdfb5907 100644
--- a/openlp/core/lib/db.py
+++ b/openlp/core/lib/db.py
@@ -144,7 +144,7 @@ def get_db_path(plugin_name, db_file_name=None):
         return 'sqlite:///{path}/{name}'.format(path=AppLocation.get_section_data_path(plugin_name), name=db_file_name)
 
 
-def handle_db_error(plugin_name, db_file_name):
+def handle_db_error(plugin_name, db_file_name):  # TODO: To pathlib
     """
     Log and report to the user that a database cannot be loaded
 
@@ -159,7 +159,7 @@ def handle_db_error(plugin_name, db_file_name):
                                          'OpenLP cannot load your database.\n\nDatabase: {db}').format(db=db_path))
 
 
-def init_url(plugin_name, db_file_name=None):
+def init_url(plugin_name, db_file_name=None):  # TODO: Pathlib
     """
     Return the database URL.
 
diff --git a/openlp/core/lib/serviceitem.py b/openlp/core/lib/serviceitem.py
index 6b8bc05e6..2d43697dc 100644
--- a/openlp/core/lib/serviceitem.py
+++ b/openlp/core/lib/serviceitem.py
@@ -263,7 +263,7 @@ class ServiceItem(RegistryProperties):
             file_location = os.path.join(path, file_name)
             file_location_hash = md5_hash(file_location.encode('utf-8'))
             image = os.path.join(str(AppLocation.get_section_data_path(self.name)), 'thumbnails',
-                                 file_location_hash, ntpath.basename(image))
+                                 file_location_hash, ntpath.basename(image))  #TODO: Pathlib
         self.slides.append({'title': file_name, 'image': image, 'path': path, 'display_title': display_title,
                             'notes': notes, 'thumbnail': image})
         # if self.is_capable(ItemCapabilities.HasThumbnails):
@@ -361,7 +361,7 @@ class ServiceItem(RegistryProperties):
                 if isinstance(file_path, str):
                     # Handle service files prior to OpenLP 3.0
                     # Windows can handle both forward and backward slashes, so we use ntpath to get the basename
-                    file_path = Path(path, ntpath.basename(file_path))
+                    file_path = path / ntpath.basename(file_path)
                 self.background_audio.append(file_path)
         self.theme_overwritten = header.get('theme_overwritten', False)
         if self.service_item_type == ServiceItemType.Text:
@@ -374,7 +374,7 @@ class ServiceItem(RegistryProperties):
             if path:
                 self.has_original_files = False
                 for text_image in service_item['serviceitem']['data']:
-                    file_path = os.path.join(path, text_image)
+                    file_path = path / text_image
                     self.add_from_image(file_path, text_image, background)
             else:
                 for text_image in service_item['serviceitem']['data']:
diff --git a/openlp/core/ui/advancedtab.py b/openlp/core/ui/advancedtab.py
index 3627e8f45..4957b86d0 100644
--- a/openlp/core/ui/advancedtab.py
+++ b/openlp/core/ui/advancedtab.py
@@ -478,7 +478,7 @@ class AdvancedTab(SettingsTab):
                 minute=self.service_name_time.time().minute()
             )
         try:
-            service_name_example = format_time(str(self.service_name_edit.text()), local_time)
+            service_name_example = format_time(self.service_name_edit.text(), local_time)
         except ValueError:
             preset_is_valid = False
             service_name_example = translate('OpenLP.AdvancedTab', 'Syntax error.')
diff --git a/openlp/core/ui/mainwindow.py b/openlp/core/ui/mainwindow.py
index dabfca79e..461ba82f9 100644
--- a/openlp/core/ui/mainwindow.py
+++ b/openlp/core/ui/mainwindow.py
@@ -1334,7 +1334,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow, LogMixin, RegistryPropert
                 self.show_status_message(
                     translate('OpenLP.MainWindow', 'Copying OpenLP data to new data directory location - {path} '
                               '- Please wait for copy to finish').format(path=self.new_data_path))
-                dir_util.copy_tree(str(old_data_path), str(self.new_data_path))
+                dir_util.copy_tree(old_data_path, self.new_data_path)
                 self.log_info('Copy successful')
             except (OSError, DistutilsFileError) as why:
                 self.application.set_normal_cursor()
diff --git a/openlp/core/ui/media/__init__.py b/openlp/core/ui/media/__init__.py
index 4e38cc122..5f3e4a072 100644
--- a/openlp/core/ui/media/__init__.py
+++ b/openlp/core/ui/media/__init__.py
@@ -54,7 +54,7 @@ class ItemMediaInfo(object):
     """
     This class hold the media related info
     """
-    file_info = None
+    file_info = None  # TODO: Ptahlib?
     volume = 100
     is_background = False
     can_loop_playback = False
diff --git a/openlp/core/ui/media/vlcplayer.py b/openlp/core/ui/media/vlcplayer.py
index 0cadc8837..19ce7863c 100644
--- a/openlp/core/ui/media/vlcplayer.py
+++ b/openlp/core/ui/media/vlcplayer.py
@@ -197,7 +197,7 @@ class VlcPlayer(MediaPlayer):
         """
         return get_vlc() is not None
 
-    def load(self, display, file):
+    def load(self, display, file):  # TODO: pathlib
         """
         Load a video into VLC
 
diff --git a/openlp/core/ui/servicemanager.py b/openlp/core/ui/servicemanager.py
index ac179663e..2ce4b5d19 100644
--- a/openlp/core/ui/servicemanager.py
+++ b/openlp/core/ui/servicemanager.py
@@ -234,7 +234,7 @@ class Ui_ServiceManager(object):
         self.service_manager_list.itemExpanded.connect(self.expanded)
         # Last little bits of setting up
         self.service_theme = Settings().value(self.main_window.service_manager_settings_section + '/service theme')
-        self.service_path = str(AppLocation.get_section_data_path('servicemanager'))
+        self.service_path = AppLocation.get_section_data_path('servicemanager')
         # build the drag and drop context menu
         self.dnd_menu = QtWidgets.QMenu()
         self.new_action = self.dnd_menu.addAction(translate('OpenLP.ServiceManager', '&Add New Item'))
@@ -590,11 +590,11 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
                 self.main_window.increment_progress_bar(service_content_size)
                 # Finally add all the listed media files.
                 for write_path in write_list:
-                    zip_file.write(str(write_path), str(write_path))
+                    zip_file.write(write_path, write_path)
                     self.main_window.increment_progress_bar(write_path.stat().st_size)
                 with suppress(FileNotFoundError):
                     file_path.unlink()
-                os.link(temp_file.name, str(file_path))
+                os.link(temp_file.name, file_path)
             Settings().setValue(self.main_window.service_manager_settings_section + '/last directory', file_path.parent)
         except (PermissionError, OSError) as error:
             self.log_exception('Failed to save service to disk: {name}'.format(name=file_path))
@@ -679,7 +679,7 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
         service_data = None
         self.application.set_busy_cursor()
         try:
-            with zipfile.ZipFile(str(file_path)) as zip_file:
+            with zipfile.ZipFile(file_path) as zip_file:
                 compressed_size = 0
                 for zip_info in zip_file.infolist():
                     compressed_size += zip_info.compress_size
@@ -692,7 +692,7 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
                             service_data = json_file.read()
                     else:
                         zip_info.filename = os.path.basename(zip_info.filename)
-                        zip_file.extract(zip_info, str(self.service_path))
+                        zip_file.extract(zip_info, self.service_path)
                     self.main_window.increment_progress_bar(zip_info.compress_size)
             if service_data:
                 items = json.loads(service_data, cls=OpenLPJsonDecoder)
@@ -1239,11 +1239,11 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
         """
         Empties the service_path of temporary files on system exit.
         """
-        for file_name in os.listdir(self.service_path):
-            file_path = Path(self.service_path, file_name)
+        for file_path in self.service_path.iterdir():
             delete_file(file_path)
-        if os.path.exists(os.path.join(self.service_path, 'audio')):
-            shutil.rmtree(os.path.join(self.service_path, 'audio'), True)
+        audio_path = self.service_path / 'audio'
+        if audio_path.exists():
+            audio_path.rmtree(True)
 
     def on_theme_combo_box_selected(self, current_index):
         """
diff --git a/openlp/core/ui/thememanager.py b/openlp/core/ui/thememanager.py
index 188688c3f..4ae79ee6b 100644
--- a/openlp/core/ui/thememanager.py
+++ b/openlp/core/ui/thememanager.py
@@ -422,10 +422,10 @@ class ThemeManager(QtWidgets.QWidget, RegistryBase, Ui_ThemeManager, LogMixin, R
         :rtype: bool
         """
         try:
-            with zipfile.ZipFile(str(theme_path), 'w') as theme_zip:
+            with zipfile.ZipFile(theme_path, 'w') as theme_zip:
                 source_path = self.theme_path / theme_name
                 for file_path in source_path.iterdir():
-                    theme_zip.write(str(file_path), os.path.join(theme_name, file_path.name))
+                    theme_zip.write(file_path, Path(theme_name, file_path.name))
             return True
         except OSError as ose:
             self.log_exception('Export Theme Failed')
@@ -567,7 +567,7 @@ class ThemeManager(QtWidgets.QWidget, RegistryBase, Ui_ThemeManager, LogMixin, R
         json_theme = False
         theme_name = ""
         try:
-            with zipfile.ZipFile(str(file_path)) as theme_zip:
+            with zipfile.ZipFile(file_path) as theme_zip:
                 json_file = [name for name in theme_zip.namelist() if os.path.splitext(name)[1].lower() == '.json']
                 if len(json_file) != 1:
                     # TODO: remove XML handling after once the upgrade path from 2.4 is no longer required
diff --git a/openlp/core/widgets/edits.py b/openlp/core/widgets/edits.py
index a90aa2cd0..b80c61ee6 100644
--- a/openlp/core/widgets/edits.py
+++ b/openlp/core/widgets/edits.py
@@ -352,7 +352,7 @@ class PathEdit(QtWidgets.QWidget):
         :rtype: None
         """
         if self._path != path:
-            self._path = path
+            self.path = path
             self.pathChanged.emit(path)
 
 
diff --git a/openlp/core/widgets/wizard.py b/openlp/core/widgets/wizard.py
index cf37e5bbf..284caba96 100644
--- a/openlp/core/widgets/wizard.py
+++ b/openlp/core/widgets/wizard.py
@@ -300,7 +300,7 @@ class OpenLPWizard(QtWidgets.QWizard, RegistryProperties):
         file_path, filter_used = FileDialog.getOpenFileName(
             self, title, Settings().value(self.plugin.settings_section + '/' + setting_name), filters)
         if file_path:
-            editbox.setText(str(file_path))
+            editbox.setText(str(file_path))  # TODO: to pathdedit
             Settings().setValue(self.plugin.settings_section + '/' + setting_name, file_path.parent)
 
     def get_folder(self, title, editbox, setting_name):
@@ -316,5 +316,5 @@ class OpenLPWizard(QtWidgets.QWizard, RegistryProperties):
             self, title, Settings().value(self.plugin.settings_section + '/' + setting_name),
             FileDialog.ShowDirsOnly)
         if folder_path:
-            editbox.setText(str(folder_path))
+            editbox.setText(str(folder_path))  # TODO: to pathedit
             Settings().setValue(self.plugin.settings_section + '/' + setting_name, folder_path)
diff --git a/openlp/plugins/bibles/lib/bibleimport.py b/openlp/plugins/bibles/lib/bibleimport.py
index 66f06c4ab..7c62236c6 100644
--- a/openlp/plugins/bibles/lib/bibleimport.py
+++ b/openlp/plugins/bibles/lib/bibleimport.py
@@ -48,9 +48,9 @@ class BibleImport(BibleDB, LogMixin, RegistryProperties):
         """
         Check if the supplied file is compressed
 
-        :param file_path: A path to the file to check
+        :param openlp.core.common.path.Path file_path: A path to the file to check
         """
-        if is_zipfile(str(file_path)):
+        if is_zipfile(file_path):
             critical_error_message_box(
                 message=translate('BiblesPlugin.BibleImport',
                                   'The file "{file}" you supplied is compressed. You must decompress it before import.'
diff --git a/openlp/plugins/bibles/lib/importers/wordproject.py b/openlp/plugins/bibles/lib/importers/wordproject.py
index 248080f98..22ab5e165 100644
--- a/openlp/plugins/bibles/lib/importers/wordproject.py
+++ b/openlp/plugins/bibles/lib/importers/wordproject.py
@@ -51,7 +51,7 @@ class WordProjectBible(BibleImport):
         Unzip the file to a temporary directory
         """
         self.tmp = TemporaryDirectory()
-        with ZipFile(str(self.file_path)) as zip_file:
+        with ZipFile(self.file_path) as zip_file:
             zip_file.extractall(self.tmp.name)
         self.base_path = Path(self.tmp.name, self.file_path.stem)
 
diff --git a/openlp/plugins/media/lib/mediaitem.py b/openlp/plugins/media/lib/mediaitem.py
index 72a0e5c50..dad964dd5 100644
--- a/openlp/plugins/media/lib/mediaitem.py
+++ b/openlp/plugins/media/lib/mediaitem.py
@@ -229,8 +229,8 @@ class MediaMediaItem(MediaManagerItem, RegistryProperties):
         Initialize media item.
         """
         self.list_view.clear()
-        self.service_path = str(AppLocation.get_section_data_path(self.settings_section) / 'thumbnails')
-        create_paths(Path(self.service_path))
+        self.service_path = AppLocation.get_section_data_path(self.settings_section) / 'thumbnails'
+        create_paths(self.service_path)
         self.load_list([path_to_str(file) for file in Settings().value(self.settings_section + '/media files')])
         self.rebuild_players()
 
@@ -264,7 +264,7 @@ class MediaMediaItem(MediaManagerItem, RegistryProperties):
         :param media: The media
         :param target_group:
         """
-        media.sort(key=lambda file_name: get_natural_key(os.path.split(str(file_name))[1]))
+        media.sort(key=lambda file_path: get_natural_key(file_path.name))
         for track in media:
             track_info = QtCore.QFileInfo(track)
             item_name = None
diff --git a/openlp/plugins/songs/lib/importers/cclifile.py b/openlp/plugins/songs/lib/importers/cclifile.py
index facce65c9..d307c6ca7 100644
--- a/openlp/plugins/songs/lib/importers/cclifile.py
+++ b/openlp/plugins/songs/lib/importers/cclifile.py
@@ -67,7 +67,7 @@ class CCLIFileImport(SongImport):
                         details = {'confidence': 1, 'encoding': 'utf-8'}
                     except UnicodeDecodeError:
                         details = chardet.detect(detect_content)
-                in_file = codecs.open(str(file_path), 'r', details['encoding'])
+                in_file = codecs.open(file_path, 'r', details['encoding'])
                 if not in_file.read(1) == '\ufeff':
                     # not UTF or no BOM was found
                     in_file.seek(0)
diff --git a/tests/functional/openlp_core/api/test_deploy.py b/tests/functional/openlp_core/api/test_deploy.py
index 784605034..439dc2b8c 100644
--- a/tests/functional/openlp_core/api/test_deploy.py
+++ b/tests/functional/openlp_core/api/test_deploy.py
@@ -63,8 +63,8 @@ class TestRemoteDeploy(TestCase):
         deploy_zipfile(root_path, 'site.zip')
 
         # THEN: the zip file should have been extracted to the right location
-        MockZipFile.assert_called_once_with('/tmp/remotes/site.zip')
-        mocked_zipfile.extractall.assert_called_once_with('/tmp/remotes')
+        MockZipFile.assert_called_once_with(Path('/tmp/remotes/site.zip'))
+        mocked_zipfile.extractall.assert_called_once_with(Path('/tmp/remotes'))
 
     @patch('openlp.core.api.deploy.Registry')
     @patch('openlp.core.api.deploy.get_web_page')
diff --git a/tests/functional/openlp_core/common/test_path.py b/tests/functional/openlp_core/common/test_path.py
index 7c0a34635..d6668ea67 100644
--- a/tests/functional/openlp_core/common/test_path.py
+++ b/tests/functional/openlp_core/common/test_path.py
@@ -179,9 +179,8 @@ class TestShutil(TestCase):
             # WHEN: Calling :func:`openlp.core.common.path.rmtree` with the path parameter as Path object type
             path.rmtree()
 
-            # THEN: :func:`shutil.rmtree` should have been called with the str equivalents of the Path object.
-            mocked_shutil_rmtree.assert_called_once_with(
-                os.path.join('test', 'path'), False, None)
+            # THEN: :func:`shutil.rmtree` should have been called with the the Path object.
+            mocked_shutil_rmtree.assert_called_once_with(Path('test', 'path'), False, None)
 
     def test_rmtree_optional_params(self):
         """
@@ -198,8 +197,7 @@ class TestShutil(TestCase):
 
             # THEN: :func:`shutil.rmtree` should have been called with the optional parameters, with out any of the
             #       values being modified
-            mocked_shutil_rmtree.assert_called_once_with(
-                os.path.join('test', 'path'), True, mocked_on_error)
+            mocked_shutil_rmtree.assert_called_once_with(path, True, mocked_on_error)
 
     def test_which_no_command(self):
         """
diff --git a/tests/functional/openlp_core/lib/test_serviceitem.py b/tests/functional/openlp_core/lib/test_serviceitem.py
index 98436de7e..d2152bdec 100644
--- a/tests/functional/openlp_core/lib/test_serviceitem.py
+++ b/tests/functional/openlp_core/lib/test_serviceitem.py
@@ -141,7 +141,7 @@ class TestServiceItem(TestCase, TestMixin):
         """
         # GIVEN: A new service item and a mocked add icon function
         image_name = 'image_1.jpg'
-        test_file = os.path.join(str(TEST_PATH), image_name)
+        test_file = TEST_PATH / image_name
         frame_array = {'path': test_file, 'title': image_name}
 
         service_item = ServiceItem(None)
@@ -154,7 +154,7 @@ class TestServiceItem(TestCase, TestMixin):
                 mocked_get_section_data_path:
             mocked_exists.return_value = True
             mocked_get_section_data_path.return_value = Path('/path/')
-            service_item.set_from_service(line, str(TEST_PATH))
+            service_item.set_from_service(line, TEST_PATHb)
 
         # THEN: We should get back a valid service item
         assert service_item.is_valid is True, 'The new service item should be valid'
diff --git a/tests/functional/openlp_core/ui/test_thememanager.py b/tests/functional/openlp_core/ui/test_thememanager.py
index 3318653a0..1c0d5aa25 100644
--- a/tests/functional/openlp_core/ui/test_thememanager.py
+++ b/tests/functional/openlp_core/ui/test_thememanager.py
@@ -66,9 +66,9 @@ class TestThemeManager(TestCase):
         theme_manager._export_theme(Path('some', 'path', 'Default.otz'), 'Default')
 
         # THEN: The zipfile should be created at the given path
-        mocked_zipfile_init.assert_called_with(os.path.join('some', 'path', 'Default.otz'), 'w')
-        mocked_zipfile_write.assert_called_with(str(RESOURCE_PATH / 'themes' / 'Default' / 'Default.xml'),
-                                                os.path.join('Default', 'Default.xml'))
+        mocked_zipfile_init.assert_called_with(Path('some', 'path', 'Default.otz'), 'w')
+        mocked_zipfile_write.assert_called_with(RESOURCE_PATH / 'themes' / 'Default' / 'Default.xml',
+                                                Path('Default', 'Default.xml'))
 
     def test_initial_theme_manager(self):
         """
diff --git a/tests/openlp_core/common/test_network_interfaces.py b/tests/openlp_core/common/test_network_interfaces.py
index 26fe15af0..dc1482c60 100644
--- a/tests/openlp_core/common/test_network_interfaces.py
+++ b/tests/openlp_core/common/test_network_interfaces.py
@@ -70,7 +70,7 @@ class FakeIP4InterfaceEntry(QObject):
         """
         Return a QFlags enum with IsUp and IsRunning
         """
-        return (QNetworkInterface.IsUp | QNetworkInterface.IsRunning)
+        return QNetworkInterface.IsUp | QNetworkInterface.IsRunning
 
     def name(self):
         return self.my_name
diff --git a/tests/openlp_core/projectors/test_projector_sourceform.py b/tests/openlp_core/projectors/test_projector_sourceform.py
index 08748f106..a738f701f 100644
--- a/tests/openlp_core/projectors/test_projector_sourceform.py
+++ b/tests/openlp_core/projectors/test_projector_sourceform.py
@@ -83,8 +83,8 @@ class ProjectorSourceFormTest(TestCase, TestMixin):
         Delete all C++ objects at end so we don't segfault.
         """
         self.projectordb.session.close()
-        del(self.projectordb)
-        del(self.projector)
+        del self.projectordb
+        del self.projector
         retries = 0
         while retries < 5:
             try: