Ruth Tester (August 17, 1903 – March 21, 1993) was a singer and dancer in Broadway musicals of the 1920s and 1930s.
Tester was born on August 17, 1903. She was married for 59 years to Fredrick Carothers. In her later years, Tester and her husband, Carothers, lived in Wellesley Hills, Massachusetts. Carothers worked as a sales executive, and predeceased Testor in 1990. Tester sang "Sing Something Simple" in the "The Garrick Gaieties" of 1930 at the Guild Theatre in New York City and performed with Rosalind Russell and Imogene Coca. She also sang and danced in the short subject film, "Makers of Melody (1929)", with Allan Gould singing the Rodgers and Hart song "Manhattan", often called, "I'll Take Manhattan". Richard Rodgers and Lorenz Hart appeared in this short as themselves. Manhattan was Rodgers and Hart's first hit and started them as a team. Tester died at the age of 89 in a nursing home in Weston, Massachusetts on March 21, 1993.