Lieutenant General Erik Mathias Hjalmar Gustafsson Testrup (14 September 1878 – 18 December 1972) was a Swedish Army officer.

Testrup was promoted to lieutenant in 1902 and attended the Royal Swedish Army Staff College from 1904 to 1906.

In 1922, Testrup was promoted to lieutenant colonel and appointed head of the Royal Swedish Army Staff College.

[2] Testrup was chairman of the military association KHS from 1924 to 1926, of the Norra skånska landstormsförbundet ("North Scanian Landstorm Association") from 1927 to 1930, of the Föreningen för befrämjandet av skolungdomens vapenövningar ("Association for the Promotion of Weapon Exercises for Students") from 1937 to 1947, of the Stockholm district of Militär Idrott from 1937 to 1943, of the Stockholm district of the Swedish Red Cross from 1943 to 1954 and of the General Commission for Voluntary Health Care in War from 1944.

[2] He was also vice chairman of Bönnelyche & Thuröe AB from 1947 to 1959 and a member of the Executive Board of the H.M. Konungens Militärhospitals- och Medaljfonder from 1947 to 1964.