Testu was the son of Henri Testu de Balincourt and Claude-Marguerite de Sève, daughter of Alexandre de Sève. During the
War of the Spanish Succession, he fought in the
Assault on Nijmegen in 1702. Testu was promoted to Colonel in the Artois-Infantry Regiment on 9 May 1703. He was made a knight of the
Order of the Holy Spirit by
Louis XV's orders on 7 June 1767. At the age of 90, he died of starvation owing to an ossified throat. ==References==