Children under age of 11 are exempt from presenting a COVID-19 test result. Travelers aged 11 and above are required to complete a registration form and pay for a test at Institut National de la Recherche Biomédicale(INRB) before arrival. This will generate a QR code which must be presented upon arrival.
Travelers are subject to COVID-19 test upon arrival at their own expense. The cost of the required test is USD 45.
Children under the age of 2 are exempt from presenting a COVID-19 test.
Travelers with proof of recovery from the virus within the last 90 days prior to boarding. Proof of a recent positive viral test and a letter from your healthcare provider or a public health official stating that you were cleared to travel.
More info at the CDC site
Travelers who did not get tested, are advised to stay home and self-quarantine for 10 days after travel.