diff --git a/plugins/Toolbox/src/CloudSync/DiscrepanciesPresenter.py b/plugins/Toolbox/src/CloudSync/DiscrepanciesPresenter.py
index 9e7ad518ad..ecb322f00e 100644
--- a/plugins/Toolbox/src/CloudSync/DiscrepanciesPresenter.py
+++ b/plugins/Toolbox/src/CloudSync/DiscrepanciesPresenter.py
@@ -24,6 +24,7 @@ class DiscrepanciesPresenter(QObject):
     def present(self, plugin_path: str, model: SubscribedPackagesModel):
         path = os.path.join(plugin_path, self._compatibility_dialog_path)
         self._dialog = self._app.createQmlComponent(path, {"subscribedPackagesModel": model})
+        assert self._dialog
         self._dialog.accepted.connect(lambda: self._onConfirmClicked(model))
 
     def _onConfirmClicked(self, model: SubscribedPackagesModel):
diff --git a/plugins/Toolbox/src/CloudSync/DownloadPresenter.py b/plugins/Toolbox/src/CloudSync/DownloadPresenter.py
index dcb74ca41f..623eacc395 100644
--- a/plugins/Toolbox/src/CloudSync/DownloadPresenter.py
+++ b/plugins/Toolbox/src/CloudSync/DownloadPresenter.py
@@ -42,11 +42,20 @@ class DownloadPresenter:
         for item in model.items:
             package_id = item["package_id"]
 
+            def finishedCallback(reply: QNetworkReply, pid = package_id) -> None:
+                self._onFinished(pid, reply)
+
+            def progressCallback(rx: int, rt: int, pid = package_id) -> None:
+                self._onProgress(pid, rx, rt)
+
+            def errorCallback(reply: QNetworkReply, error: QNetworkReply.NetworkError, pid = package_id) -> None:
+                self._onError(pid)
+
             request_data = manager.get(
                 item["download_url"],
-                callback = lambda reply, pid = package_id: self._onFinished(pid, reply),
-                download_progress_callback = lambda rx, rt, pid = package_id: self._onProgress(pid, rx, rt),
-                error_callback = lambda rx, rt, pid = package_id: self._onProgress(pid, rx, rt),
+                callback = finishedCallback,
+                download_progress_callback = progressCallback,
+                error_callback = errorCallback,
                 scope = self._scope)
 
             self._progress[package_id] = {
diff --git a/plugins/Toolbox/src/Toolbox.py b/plugins/Toolbox/src/Toolbox.py
index 54fe80e23c..8098d90d99 100644
--- a/plugins/Toolbox/src/Toolbox.py
+++ b/plugins/Toolbox/src/Toolbox.py
@@ -48,7 +48,7 @@ class Toolbox(QObject, Extension):
         self._download_request_data = None  # type: Optional[HttpRequestData]
         self._download_progress = 0  # type: float
         self._is_downloading = False  # type: bool
-        self._scope = UltimakerCloudScope(application)
+        self._scope = UltimakerCloudScope(application)  # type: UltimakerCloudScope
 
         self._request_urls = {}  # type: Dict[str, str]
         self._to_update = []  # type: List[str] # Package_ids that are waiting to be updated