diff --git a/.github/ISSUE_TEMPLATE/bug_form.yaml b/.github/ISSUE_TEMPLATE/bug_form.yaml
index de98042f..f010851a 100644
--- a/.github/ISSUE_TEMPLATE/bug_form.yaml
+++ b/.github/ISSUE_TEMPLATE/bug_form.yaml
@@ -1,5 +1,5 @@
 name: "Bug Report Form"
-description: "Report a bug or a similiar issue."
+description: "Report a bug or a similar issue."
 body:
   - type: markdown
     attributes:
diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index 7b2d69f9..13ec62b3 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -1,6 +1,6 @@
 ---
 name: Bug Report
-about: Report a bug or a similiar issue - the classic way
+about: Report a bug or a similar issue - the classic way
 title: ''
 labels: ''
 assignees: ''
@@ -18,7 +18,7 @@ If you want to suggest a feature or have any other question, please use our
 #### Description
 
 <!-- Description
-Please decribe your issue and its context in a clear and concise way.
+Please describe your issue and its context in a clear and concise way.
 Please try to reproduce the issue and provide the steps to reproduce it.
 -->
 
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index d6e05f6a..231c88ff 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -36,7 +36,7 @@
 - [ ] All new and existing tests passed.
 
 
-*I provide my contribution under the terms of the [license](./../../LICENSE.txt) of this repository and I affirm the [Developer Certificate of Origin][dco].*
+*I provide my contribution under the terms of the [license](./../LICENSE.txt) of this repository and I affirm the [Developer Certificate of Origin][dco].*
 
 [dco]: https://developercertificate.org/
 
diff --git a/noxfile.py b/noxfile.py
index 804b8d60..b5f6fdfa 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -28,10 +28,10 @@ else:
 @nox.parametrize("borgbackup", supported_borgbackup_versions)
 def run_tests(session, borgbackup):
     # install borgbackup
-    if (sys.platform == 'darwin'):
+    if sys.platform == 'darwin':
         # in macOS there's currently no fuse package which works with borgbackup directly
         session.install(f"borgbackup=={borgbackup}")
-    elif (borgbackup == "1.1.18"):
+    elif borgbackup == "1.1.18":
         # borgbackup 1.1.18 doesn't support pyfuse3
         session.install("llfuse")
         session.install(f"borgbackup[llfuse]=={borgbackup}")
diff --git a/package/fix_app_qt_folder_names_for_codesign.py b/package/fix_app_qt_folder_names_for_codesign.py
index 0adfb03f..cbd5805d 100644
--- a/package/fix_app_qt_folder_names_for_codesign.py
+++ b/package/fix_app_qt_folder_names_for_codesign.py
@@ -18,10 +18,10 @@ def create_symlink(folder: Path) -> None:
     """Create the appropriate symlink in the MacOS folder
     pointing to the Resources folder.
     """
-    sibbling = Path(str(folder).replace("MacOS", ""))
+    sibling = Path(str(folder).replace("MacOS", ""))
 
     # PyQt6/Qt/qml/QtQml/Models.2
-    root = str(sibbling).partition("Contents")[2].lstrip("/")
+    root = str(sibling).partition("Contents")[2].lstrip("/")
     # ../../../../
     backward = "../" * (root.count("/") + 1)
     # ../../../../Resources/PyQt6/Qt/qml/QtQml/Models.2
@@ -41,7 +41,7 @@ def fix_dll(dll: Path) -> None:
 
     def match_func(pth: str) -> Optional[str]:
         """Callback function for MachO.rewriteLoadCommands() that is
-        called on every lookup path setted in the DLL headers.
+        called on every lookup path set in the DLL headers.
         By returning None for system libraries, it changes nothing.
         Else we return a relative path pointing to the good file
         in the MacOS folder.
@@ -73,7 +73,7 @@ def find_problematic_folders(folder: Path) -> Generator[Path, None, None]:
     """Recursively yields problematic folders (containing a dot in their name)."""
     for path in folder.iterdir():
         if not path.is_dir() or path.is_symlink():
-            # Skip simlinks as they are allowed (even with a dot)
+            # Skip symlinks as they are allowed (even with a dot)
             continue
         if "." in path.name:
             yield path
@@ -83,7 +83,7 @@ def find_problematic_folders(folder: Path) -> Generator[Path, None, None]:
 
 def move_contents_to_resources(folder: Path) -> Generator[Path, None, None]:
     """Recursively move any non symlink file from a problematic folder
-    to the sibbling one in Resources.
+    to the sibling one in Resources.
     """
     for path in folder.iterdir():
         if path.is_symlink():
@@ -91,10 +91,10 @@ def move_contents_to_resources(folder: Path) -> Generator[Path, None, None]:
         if path.name == "qml":
             yield from move_contents_to_resources(path)
         else:
-            sibbling = Path(str(path).replace("MacOS", "Resources"))
-            sibbling.parent.mkdir(parents=True, exist_ok=True)
-            shutil.move(path, sibbling)
-            yield sibbling
+            sibling = Path(str(path).replace("MacOS", "Resources"))
+            sibling.parent.mkdir(parents=True, exist_ok=True)
+            shutil.move(path, sibling)
+            yield sibling
 
 
 def main(args: List[str]) -> int:
diff --git a/src/vorta/application.py b/src/vorta/application.py
index 34c1acf9..8857a51e 100644
--- a/src/vorta/application.py
+++ b/src/vorta/application.py
@@ -308,11 +308,6 @@ class VortaApp(QtSingleApplication):
 
         Displays a `QMessageBox` with an error message depending on the
         return code of the `BorgJob`.
-
-        Parameters
-        ----------
-        repo_url : str
-            The url of the repo of concern
         """
         # extract data from the params for the borg job
         repo_url = result['params']['repo_url']
@@ -344,7 +339,7 @@ class VortaApp(QtSingleApplication):
             elif returncode > 128:
                 # 128+N - killed by signal N (e.g. 137 == kill -9)
                 signal = returncode - 128
-                text = self.tr('Repository data check for repo was killed by signal %s.') % (signal)
+                text = self.tr('Repository data check for repo was killed by signal %s.') % signal
                 infotext = self.tr('The process running the check job got a kill signal. Try again.')
             else:
                 # Real error
diff --git a/src/vorta/borg/jobs_manager.py b/src/vorta/borg/jobs_manager.py
index 2028535d..4659f3e7 100644
--- a/src/vorta/borg/jobs_manager.py
+++ b/src/vorta/borg/jobs_manager.py
@@ -25,9 +25,9 @@ class JobInterface(QObject):
     @abstractmethod
     def cancel(self):
         """
-        Cancel can be called when the job is not started. It is the responsability of FuncJob to not cancel job if
+        Cancel can be called when the job is not started. It is the responsibility of FuncJob to not cancel job if
         no job is running.
-        The cancel mehod of JobsManager calls the cancel method on the running jobs only. Other jobs are dequeued.
+        The cancel method of JobsManager calls the cancel method on the running jobs only. Other jobs are dequeued.
         """
         pass
 
@@ -50,6 +50,7 @@ class SiteWorker(threading.Thread):
         self.current_job = None
 
     def run(self):
+        job = None
         while True:
             try:
                 job = self.jobs.get(False)
@@ -58,7 +59,8 @@ class SiteWorker(threading.Thread):
                 job.run()
                 logger.debug("Finish job for site: %s", job.repo_id())
             except queue.Empty:
-                logger.debug("No more jobs for site: %s", job.repo_id())
+                if job is not None:
+                    logger.debug("No more jobs for site: %s", job.repo_id())
                 return
 
 
@@ -77,19 +79,20 @@ class JobsManager:
 
     def is_worker_running(self, site=None):
         """
-        See if there are any active jobs. The user can't start a backup if a job is
-        running. The scheduler can.
-        """
-        # Check status for specific site (repo)
-        if site in self.workers:
-            return self.workers[site].is_alive()
-        else:
-            return False
+        See if there are any active jobs.
+        The user can't start a backup if a job is running. The scheduler can.
 
-        # Check if *any* worker is active
-        for _, worker in self.workers.items():
-            if worker.is_alive():
-                return True
+        If site is None, check if there is any worker active for any site (repo).
+        If site is not None, only check if there is a worker active for the given site (repo).
+        """
+        if site is not None:
+            if site in self.workers:
+                if self.workers[site].is_alive():
+                    return True
+        else:
+            for _, worker in self.workers.items():
+                if worker.is_alive():
+                    return True
         return False
 
     def add_job(self, job):
diff --git a/src/vorta/network_status/abc.py b/src/vorta/network_status/abc.py
index 60f9353a..7f74fc16 100644
--- a/src/vorta/network_status/abc.py
+++ b/src/vorta/network_status/abc.py
@@ -24,7 +24,7 @@ class NetworkStatusMonitor:
 
     def is_network_status_available(self):
         """Is the network status really available, and not just a dummy implementation?"""
-        return type(self) != NetworkStatusMonitor
+        return type(self) is not NetworkStatusMonitor
 
     def is_network_metered(self) -> bool:
         """Is the currently connected network a metered connection?"""
diff --git a/src/vorta/profile_export.py b/src/vorta/profile_export.py
index fa26ac5c..a370ce1d 100644
--- a/src/vorta/profile_export.py
+++ b/src/vorta/profile_export.py
@@ -36,7 +36,7 @@ class ProfileExport:
     def repo_url(self):
         if (
             'repo' in self._profile_dict
-            and type(self._profile_dict['repo']) == dict
+            and isinstance(self._profile_dict['repo'], dict)
             and 'url' in self._profile_dict['repo']
         ):
             return self._profile_dict['repo']['url']
diff --git a/src/vorta/scheduler.py b/src/vorta/scheduler.py
index 7a3fcee5..aa8b2859 100644
--- a/src/vorta/scheduler.py
+++ b/src/vorta/scheduler.py
@@ -70,7 +70,7 @@ class VortaScheduler(QtCore.QObject):
             self.bus = bus
             self.bus.connect(service, path, interface, name, "b", self.loginSuspendNotify)
         else:
-            logger.warn('Failed to connect to DBUS interface to detect sleep/resume events')
+            logger.warning('Failed to connect to DBUS interface to detect sleep/resume events')
 
     @QtCore.pyqtSlot(bool)
     def loginSuspendNotify(self, suspend: bool):
diff --git a/src/vorta/views/archive_tab.py b/src/vorta/views/archive_tab.py
index cb4d4184..d2af5757 100644
--- a/src/vorta/views/archive_tab.py
+++ b/src/vorta/views/archive_tab.py
@@ -875,7 +875,7 @@ class ArchiveTab(ArchiveTabBase, ArchiveTabUI, BackupProfileMixin):
         return msg.exec() == QMessageBox.StandardButton.Yes
 
     def delete_action(self):
-        # Since this function modify the UI, we can't put the whole function in a JobQUeue.
+        # Since this function modify the UI, we can't put the whole function in a JobQueue.
 
         # determine selected archives
         archives = []
diff --git a/src/vorta/views/diff_result.py b/src/vorta/views/diff_result.py
index 5d262efa..da74ff72 100644
--- a/src/vorta/views/diff_result.py
+++ b/src/vorta/views/diff_result.py
@@ -381,7 +381,6 @@ def parse_diff_lines(lines: List[str], model: 'DiffTree'):
 
         if not parsed_line:
             raise Exception("Couldn't parse diff output `{}`".format(line))
-            continue
 
         path = PurePath(parsed_line['path'])
         file_type = FileType.FILE
diff --git a/src/vorta/views/partials/treemodel.py b/src/vorta/views/partials/treemodel.py
index a184a542..ceff3eb4 100644
--- a/src/vorta/views/partials/treemodel.py
+++ b/src/vorta/views/partials/treemodel.py
@@ -610,7 +610,7 @@ class FileTreeModel(QAbstractItemModel, Generic[T]):
         if isinstance(path, PurePath):
             path = path.parts
 
-        return self.root.get_path(path)  # handels empty path
+        return self.root.get_path(path)  # handles empty path
 
     def data(self, index: QModelIndex, role: int = Qt.ItemDataRole.DisplayRole):
         """
diff --git a/src/vorta/views/profile_add_edit_dialog.py b/src/vorta/views/profile_add_edit_dialog.py
index 56d040c1..75b767d9 100644
--- a/src/vorta/views/profile_add_edit_dialog.py
+++ b/src/vorta/views/profile_add_edit_dialog.py
@@ -27,7 +27,7 @@ class AddProfileWindow(AddProfileBase, AddProfileUI):
 
         self.name_blank = trans_late('AddProfileWindow', 'Please enter a profile name.')
         self.name_exists = trans_late('AddProfileWindow', 'A profile with this name already exists.')
-        # Call validate to set inital messages
+        # Call validate to set initial messages
         self.buttonBox.button(QDialogButtonBox.StandardButton.Save).setEnabled(self.validate())
 
     def _set_status(self, text):
diff --git a/src/vorta/views/repo_tab.py b/src/vorta/views/repo_tab.py
index 3b04ffa2..e9f38dba 100644
--- a/src/vorta/views/repo_tab.py
+++ b/src/vorta/views/repo_tab.py
@@ -40,7 +40,7 @@ class RepoTab(RepoBase, RepoUI, BackupProfileMixin):
         # compression or speed on a unified scale. this is not 1-dimensional and also depends
         # on the input data. so we just tell what we know for sure.
         # "auto" is used for some slower / older algorithms to avoid wasting a lot of time
-        # on uncompressible data.
+        # on incompressible data.
         self.repoCompression.addItem(self.tr('LZ4 (modern, default)'), 'lz4')
         self.repoCompression.addItem(self.tr('Zstandard Level 3 (modern)'), 'zstd,3')
         self.repoCompression.addItem(self.tr('Zstandard Level 8 (modern)'), 'zstd,8')
diff --git a/src/vorta/views/source_tab.py b/src/vorta/views/source_tab.py
index 5a839e62..ed63be2a 100644
--- a/src/vorta/views/source_tab.py
+++ b/src/vorta/views/source_tab.py
@@ -331,7 +331,7 @@ class SourceTab(SourceBase, SourceUI, BackupProfileMixin):
         profile = self.profile()
         # sort indexes, starting with lowest
         indexes.sort()
-        # remove each selected row, starting with highest index (otherways, higher indexes become invalid)
+        # remove each selected row, starting with the highest index (otherwise, higher indexes become invalid)
         for index in reversed(indexes):
             db_item = SourceFileModel.get(
                 dir=self.sourceFilesWidget.item(index.row(), SourceColumn.Path).text(),
diff --git a/tests/unit/test_treemodel.py b/tests/unit/test_treemodel.py
index 1b76d585..dd2b9717 100644
--- a/tests/unit/test_treemodel.py
+++ b/tests/unit/test_treemodel.py
@@ -87,7 +87,7 @@ class TestFileSystemItem:
         item.add(child2)
         item.add(child3)
 
-        # test get inexistent subpath
+        # test get nonexistent subpath
         assert item.get('unknown') is None
         assert item.get('unknown', default='default') == 'default'