The Test Garden of Hamma (Arabic: حديقة التجارب الحامة) (French: Jardin d'Essai du Hamma) is a 32-hectare (79-acre) botanical garden (38 hectares (94 acres) of gardens and 20 hectares (49 acres) of arboretum) located in the Mohamed Belouizdad (formerly Hamma-Anassers) district of Algiers.

In 1832, Pierre Genty De Bussy, the Civil Intendant, and General Antoine Avisard, interim governor, decided to drain the marshes at the foot of the Arcades hill.

The initial site was renamed Little Test Garden until its exchange in 1848 for another piece of land inside the Nursery.

The garden's principal activity is to provide trees to public organisations and to European settlers.

Reopened in 2009, it is now home to the Algerian National Institute of Agronomical Research, and was opened to visitors.