diff --git a/hutch_python/tests/test_ipython_session_timer.py b/hutch_python/tests/test_ipython_session_timer.py
index 7478481a..3720078b 100644
--- a/hutch_python/tests/test_ipython_session_timer.py
+++ b/hutch_python/tests/test_ipython_session_timer.py
@@ -10,7 +10,6 @@
 @pytest.fixture(scope='function')
 def fake_ipython():
     fake_ipython = FakeIPython()
-    fake_ipython.ask_exit = lambda *args, **kwargs: None
     return fake_ipython
 
 
@@ -49,3 +48,5 @@ def test_start_session(session_timer, fake_ipython, capsys):
 
     captured = capsys.readouterr()
     assert "timed out" in captured.out
+    assert session_timer.ip.ask_exit.called
+    assert session_timer.ip.pt_app.app.exit.called