Sense organs are an unnecessary addition to the test
The addition of sense organs doesn't make the test any more demanding than it already is—and therefore is unnecessary—because the Turing test indirectly tests sense-based capabilities.
Daniel Dennett, 1985.
Note: The way in which (it is argued that) the Turing Test indirectly tests sense-based capabilities is examined in 'The Quick Probe Assumption', Box 50.