diff --git a/ai-hub/integration_tests/conftest.py b/ai-hub/integration_tests/conftest.py
index f45d069..4984094 100644
--- a/ai-hub/integration_tests/conftest.py
+++ b/ai-hub/integration_tests/conftest.py
@@ -121,6 +121,13 @@
                 "group_id": group_id,
                 "access_level": "use"
             })
+            
+        # CRITICAL FIX: Ensure the user's DB preferences points to these fresh 
+        # nodes so that tools correctly route instead of using stale nodes from prior runs.
+        updated_prefs = {
+            "default_node_ids": [NODE_1]
+        }
+        client.patch(f"{BASE_URL}/nodes/preferences", json=updated_prefs, headers=headers)
 
     # 5. Start Node Processes
     is_docker_disabled = os.getenv("SKIP_DOCKER_NODES", "true").lower() == "true"