diff --git a/src/vorta/application.py b/src/vorta/application.py
index eca9e7da..32ef8d77 100644
--- a/src/vorta/application.py
+++ b/src/vorta/application.py
@@ -88,7 +88,8 @@ class VortaApp(QtSingleApplication):
             self.backup_progress_event.emit(translate('messages', msg['message']))
 
     def open_main_window_action(self):
-        self.main_window = MainWindow(self)
+        if not self._main_window_exists():
+            self.main_window = MainWindow(self)
         self.main_window.show()
         self.main_window.raise_()
 
diff --git a/tests/conftest.py b/tests/conftest.py
index f462a420..475e7470 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -8,7 +8,7 @@ from unittest.mock import MagicMock
 import vorta
 from vorta.models import (RepoModel, RepoPassword, BackupProfileModel, SourceFileModel,
                           SettingsModel, ArchiveModel, WifiSettingModel, EventLogModel, SchemaVersion)
-
+from vorta.views.main_window import MainWindow
 
 models = [RepoModel, RepoPassword, BackupProfileModel, SourceFileModel,
           SettingsModel, ArchiveModel, WifiSettingModel, EventLogModel, SchemaVersion]
@@ -40,7 +40,7 @@ def init_db(qapp):
     source_dir = SourceFileModel(dir='/tmp/another', repo=new_repo)
     source_dir.save()
 
-    qapp.open_main_window_action()
+    qapp.main_window = MainWindow(qapp)  # Re-open main window to apply mock data in UI
 
 
 @pytest.fixture(scope='session', autouse=True)