A method for testing the integrity of a component in a measurement area of the component, using an instrument having a flexible part and a rigid end part following the flexible part and carrying an eddy current probe. The method comprises a selection step in which a template corresponding to the measurement area is selected, a shaping step in which the flexible part is shaped against the template thus selected, a positioning step, in which the instrument thus shaped is positioned so that the eddy current probe is placed in the measurement area, and a measurement step, in which a measurement is made via the eddy current probe which has been thus positioned.