A goalless stalemate at home to Libya was enough for the Eagles of Carthage to pip Congo DR to top spot in Group A, while Morocco recorded an impressive 2-0 victory away to Côte d'Ivoire.
Morocco and Tunisia have joined Nigeria, Egypt, and Senegal as the African teams who will be playing in the World Cup this summer.
Tunisia and Morocco completed CAF's line up at the FIFA World Cup™, securing the last of Africa's berths at Russian Federation 2018.
Unbeaten Tunisia have been to four previous World Cup finals and were the first African country to win a game at the finals, in 1978.
For the record, the Atlas Lions team now managed by Hervé Renard, was qualified in the past to the World Cup in 1970, 1986, 1994, 1998.More news: Items May Be Cheaper After GST Council Meet Tomorrow: 10 Points
For Morocco, Nabil Dirar and Medhi Benatia scored in the space of five minutes in the first half in Abidjan to help send the Moroccans to their first World Cup in 20 years and deny Ivory Coast a fourth straight appearance. Morocco needed just a point from the game to qualify but made sure.
Dirar opened the scoring off a cross-turned-shot on 25 minutes and Benatia doubled the lead after a corner on the half-hour.
Tunisia, meanwhile, progressed as winners of Group A despite not being able to end their campaign with victory over Libya, who finished bottom.
Immediately after Morocco's national team secured it qualification to the 2018 World Cup in Russia, Moroccans of NY flocked to Steinway street in Astoria to celebrate this victory.
Tunisia's point ensures their fifth World Cup participation - and their first since 2006 - but ensures that the Democratic Republic of Congo's wait to return to the global showpiece for the first time since 1974 will continue.