Мерс-эль-Кебир
In August 1939, she embarked six Loire 130s and eight Latécoère 298s and sailed for Oran, where she was when World War II began the next month. "Commandant Teste" remained in North African waters until December 1939, when she returned to Toulon and landed her aircraft. She served as an aircraft transport between French North Africa and Metropolitan France for the first half of 1940. In late June 1940, she was transferred from the over-crowded anchorage at Oran to Mers El Kébir. She was lightly damaged by shell splinters during the British attack on Mers-el-Kébir on 3 July 1940, but suffered no casualties. She arrived at Toulon on 18 October where she was subsequently disarmed. In June 1941, "Commandant Teste" was reactivated as a gunnery training ship.