diff --git a/tests/end-2-end/test_bec_dock_rpc_e2e.py b/tests/end-2-end/test_bec_dock_rpc_e2e.py
index 9b48fe2f..2923da9e 100644
--- a/tests/end-2-end/test_bec_dock_rpc_e2e.py
+++ b/tests/end-2-end/test_bec_dock_rpc_e2e.py
@@ -371,6 +371,7 @@ def test_rpc_call_with_exception_in_safeslot_error_popup(connected_client_gui_ob
     gui = connected_client_gui_obj
 
     gui.main.add_dock("test")
+    qtbot.waitUntil(lambda: len(gui.main.panels) == 2)  # default_figure + test
     with pytest.raises(ValueError):
         gui.main.add_dock("test")
         # time.sleep(0.1)