From 3c6b82dceb8757c3abac54b9eaff87efa8d9562d Mon Sep 17 00:00:00 2001
From: wyzula-jan <jan.wyzula@psi.ch>
Date: Wed, 15 Jul 2026 16:04:07 +0200
Subject: [PATCH] test: start mocked client with no current scan to prevent
 mock leakage into scan_item

---
 tests/unit_tests/client_mocks.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/unit_tests/client_mocks.py b/tests/unit_tests/client_mocks.py
index 80c056dc..dc8f6000 100644
--- a/tests/unit_tests/client_mocks.py
+++ b/tests/unit_tests/client_mocks.py
@@ -13,6 +13,9 @@ from bec_widgets.tests.utils import FakePositioner, Positioner
 
 @pytest.fixture(scope="function")
 def mocked_client(bec_dispatcher):
+    # A fresh session has no scan executed; otherwise the auto-generated MagicMock
+    # leaks into widgets as scan_item and its mock metadata ends up in device lookups.
+    bec_dispatcher.client.queue.scan_storage.current_scan = None
 
     # Ensure isinstance check for Positioner passes
     original_isinstance = isinstance