diff --git a/tests/functional/openlp_core_ui/test_slidecontroller.py b/tests/functional/openlp_core_ui/test_slidecontroller.py
index ed237d424..ea68b8ae9 100644
--- a/tests/functional/openlp_core_ui/test_slidecontroller.py
+++ b/tests/functional/openlp_core_ui/test_slidecontroller.py
@@ -508,18 +508,18 @@ class TestSlideController(TestCase):
         mocked_update_preview = MagicMock()
         mocked_preview_widget = MagicMock()
         mocked_slide_selected = MagicMock()
-        Registry.execute = mocked_execute
-        Registry.create()
-        slide_controller = SlideController(None)
-        slide_controller.service_item = mocked_item
-        slide_controller.update_preview = mocked_update_preview
-        slide_controller.preview_widget = mocked_preview_widget
-        slide_controller.slide_selected = mocked_slide_selected
-        slide_controller.is_live = True
-
-        # WHEN: The method is called
-        slide_controller.on_slide_selected_index([9])
-
+        with patch.object(Registry, 'execute') as mocked_execute:
+            Registry.create()
+            slide_controller = SlideController(None)
+            slide_controller.service_item = mocked_item
+            slide_controller.update_preview = mocked_update_preview
+            slide_controller.preview_widget = mocked_preview_widget
+            slide_controller.slide_selected = mocked_slide_selected
+            slide_controller.is_live = True
+    
+            # WHEN: The method is called
+            slide_controller.on_slide_selected_index([9])
+    
         # THEN: It should have sent a notification
         mocked_item.is_command.assert_called_once_with()
         mocked_execute.assert_called_once_with('mocked item_slide', [mocked_item, True, 9])
@@ -539,16 +539,16 @@ class TestSlideController(TestCase):
         mocked_update_preview = MagicMock()
         mocked_preview_widget = MagicMock()
         mocked_slide_selected = MagicMock()
-        Registry.execute = mocked_execute
-        Registry.create()
-        slide_controller = SlideController(None)
-        slide_controller.service_item = mocked_item
-        slide_controller.update_preview = mocked_update_preview
-        slide_controller.preview_widget = mocked_preview_widget
-        slide_controller.slide_selected = mocked_slide_selected
-
-        # WHEN: The method is called
-        slide_controller.on_slide_selected_index([7])
+        with patch.object(Registry, 'execute') as mocked_execute:
+            Registry.create()
+            slide_controller = SlideController(None)
+            slide_controller.service_item = mocked_item
+            slide_controller.update_preview = mocked_update_preview
+            slide_controller.preview_widget = mocked_preview_widget
+            slide_controller.slide_selected = mocked_slide_selected
+    
+            # WHEN: The method is called
+            slide_controller.on_slide_selected_index([7])
 
         # THEN: It should have sent a notification
         mocked_item.is_command.assert_called_once_with()
@@ -556,3 +556,5 @@ class TestSlideController(TestCase):
         self.assertEqual(0, mocked_update_preview.call_count, 'Update preview should not have been called')
         mocked_preview_widget.change_slide.assert_called_once_with(7)
         mocked_slide_selected.assert_called_once_with()
+        
+