diff --git a/tests/test_session_hub_merge.py b/tests/test_session_hub_merge.py
index f5b6b13..bbb9bb1 100644
--- a/tests/test_session_hub_merge.py
+++ b/tests/test_session_hub_merge.py
@@ -5,14 +5,14 @@ import inspect
 def test_session_hub_window_removed():
     import src.gui_2 as gui_2
 
-    source = inspect.getsource(gui_2.App._gui_func)
+    source = inspect.getsource(gui_2.App._render_main_interface)
     assert "Session Hub" not in source, "Session Hub window should be removed"
 
 
 def test_discussion_hub_has_snapshot_tab():
     import src.gui_2 as gui_2
 
-    source = inspect.getsource(gui_2.App._gui_func)
+    source = inspect.getsource(gui_2.App._render_discussion_hub)
     assert "Snapshot" in source, "Discussion Hub should have Snapshot tab"
     assert "_render_snapshot_tab" in source, "Discussion Hub should call _render_snapshot_tab"
 
@@ -20,7 +20,7 @@ def test_discussion_hub_has_snapshot_tab():
 def test_discussion_hub_has_context_composition_placeholder():
     import src.gui_2 as gui_2
 
-    source = inspect.getsource(gui_2.App._gui_func)
+    source = inspect.getsource(gui_2.App._render_discussion_hub)
     assert "Context Composition" in source, (
         "Discussion Hub should have Context Composition tab placeholder"
     )
@@ -29,7 +29,7 @@ def test_discussion_hub_has_context_composition_placeholder():
 def test_discussion_hub_has_takes_tab():
     import src.gui_2 as gui_2
 
-    source = inspect.getsource(gui_2.App._gui_func)
+    source = inspect.getsource(gui_2.App._render_discussion_hub)
     assert "Takes" in source, "Discussion Hub should have Takes tab"