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 2523a1b0..5f19d2ff 100644
--- a/tests/end-2-end/test_bec_dock_rpc_e2e.py
+++ b/tests/end-2-end/test_bec_dock_rpc_e2e.py
@@ -372,6 +372,7 @@ def test_rpc_call_with_exception_in_safeslot_error_popup(connected_client_gui_ob
 
     gui.main.add_dock("test")
     qtbot.waitUntil(lambda: len(gui.main.panels) == 2)  # default_figure + test
+    qtbot.wait(500)
     with pytest.raises(ValueError):
         gui.main.add_dock("test")
         # time.sleep(0.1)