Testament of Youth is a memoir of British nurse and activist Vera Brittain (1893–1970), published in 1933. Brittain's memoir covers the years 1900 to 1925, and continues with Testament of Experience, published in 1957, and encompassing the years 1925 to 1950. Between these two books comes Testament of Friendship, 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.

Winifred Holtby was an English novelist and journalist, now best known for her novel South Riding, which was posthumously published in 1936.