diff --git a/tests/tests_bec_ipython_client/test_lamni_golive_fixes.py b/tests/tests_bec_ipython_client/test_lamni_golive_fixes.py
index 44c5064e..936a0dca 100644
--- a/tests/tests_bec_ipython_client/test_lamni_golive_fixes.py
+++ b/tests/tests_bec_ipython_client/test_lamni_golive_fixes.py
@@ -183,6 +183,11 @@ def test_leye_out_closes_the_fast_shutter(monkeypatch):
         fsh = FakeShutter()
         leyey = object()
         lsamrot = object()
+        fttrz = object()
+        dttrz = object()
+
+        def __contains__(self, name):
+            return hasattr(self, name)
 
     monkeypatch.setattr(optics_mixin_module, "dev", FakeDev(), raising=False)
     monkeypatch.setattr(optics_mixin_module, "umv", lambda *a: None, raising=False)