The term ‘Test’ appears across the depth-psychology corpus in several distinct registers, none of which reduces to a simple synonym for the others. In Jung’s early experimental research, the word denotes a precisely structured psychometric instrument — the association test, the reproduction test — deployed to expose the operations of the complex through measurable reaction-time anomalies; here ‘test’ is inseparable from the laboratory ambitions of early analytical psychology. In the mythopoeic register, exemplified by Estés, the test figures as an initiatory ordeal: the trial that the soul must undergo before it may receive wisdom or transformation, a motif embedded in fairy tale and folk narrative alike. Benveniste’s philological archaeology illuminates a third stratum: the Latin superstes — the one who has passed through the test, survived the ordeal, and stands on its far side — revealing that the Indo-European conceptual field of ‘test’ is continuous with witness, survival, and sacred obligation. Allan’s study of ancient Greek middle-voice semantics adds yet another dimension: the verb peiráomai encodes self-implication in the act of testing, so that one who truly tests is also being tested. Pauli introduces the epistemological register: the test body in physics is itself disturbed by the measurement it enables, anticipating deep-psychological claims that observation alters its object. Taken together, these positions reveal ‘test’ as a site where instrument, ordeal, witnessing, and self-transformation converge.