Botswana could decriminalize gay sex on Tuesday when its high court is due to rule in a landmark case being watched across Africa after Kenya recently upheld its own anti-homosexuality laws.

Homosexual acts are outlawed in Botswana - one of Africa's most stable nations - under the country's penal code of 1965. 

An unnamed applicant is challenging two sections of the code that threaten offenders with a jail sentence of up to seven years.

Last month, Kenya's high court refused to scrap laws criminalizing homosexuality, dealing a blow to the country's gay community that rippled across a continent where homophobia is rife.

Gay rights organizations had hoped Kenya would follow in the footsteps of African nations like Angola, or those further afield like India, and end decades-old laws which criminalize gay sex.

"After an effort by activists to decriminalize same-sex relations through Kenya's High Court met a bitter defeat last month, all eyes are on Botswana," said Neela Ghoshal, a specialist in lesbian, gay, bisexual, and transgender law at the Human Rights Watch group.

"A positive ruling would give hope to an embattled but resilient African LGBT rights movement.

"It would also demonstrate that Botswana takes seriously its commitments to equality and non-discrimination."

Twenty-eight out of 49 countries in sub-Saharan Africa have laws penalizing same-sex relationships, according to Ghoshal. At the Botswana high court hearing in Gaborone in March, lawyers read a statement from the applicant.

The laws "limit me to interact with others who identify in the same way for fear of imprisonment," said the applicant identified only by the initials LM. "We are not looking for people to agree with homosexuality but to be tolerant."

The state argued that Botswana society was not yet ready to change its attitude toward homosexuality.

But Botswana, a sparsely-populated country of just 2 million people, has shown signs of increasing tolerance of sexual orientation in recent years.

In 2016, the country's appeal court ruled that the government was wrong to refuse to register an organization that represents homosexuals and other minority sexual groups.

Activists had launched that legal battle after the Home Affairs ministry rejected an application to register the Lesbians, Gays, and Bisexuals of Botswana  organization.

President Mokgweetsi Masisi last year told a meeting on gender-based violence that there are "many people of same sex relationships in this country who have been violated and have also suffered in silence."

Botswana, in southern Africa, is famed for its abundant wildlife and its diamond mines.