Testament of Youth is the first instalment, covering 1900–1925, in the memoir of Vera Brittain (1893–1970). It was published in 1933. Brittain's memoir continues with Testament of Experience, published in 1957, and encompassing the years 1925–1950. Between these two books comes Testament of Friendship (published in 1940), which is essentially a memoir of Brittain's close colleague and friend Winifred Holtby. A final segment of memoir, to be called Testament of Faith or Testament of Time, was planned by Brittain but remained unfinished at her death.