In test_transaction_style, the span_streaming branch calls items = capture_items("event") and then immediately overwrites items with capture_items("event", "span") on the next line. The first call's return list is never used, and because capture_items monkeypatches test_client.transport.capture_envelope on each invocation, the redundant first call installs an extra nested transport patch whose collected list is discarded. The first line should be removed.