The Sasol-sponsored Banyana Banyana are based in Yaounde to acclimatise the players ahead of the hot conditions expected at the eight-nation CAF African Women championship 2012 in Equatorial Guinea from October 28 to November 11.
Tall Cameroonian striker Enganamouit Gaelle tested the Banyana Banyana defence with a chip over the advancing Thoko Mndaweni as early as the seventh minute, but the keeper stretched and held on to the ball to stop a certain goal.
But Banyana were not as lucky second time around, when the same movement in the 27th minute saw Gaelle first to the ball ahead of Janine van Wyk and a charging Mndaweni, to chip into the back of the net.
Joseph Mkhonza tried out various options in the second half, with striker Noko Matlou brought on to replace the speedy Jermaine Seoposenwe.
Bloemfontein Celtic Ladies striker Sanah Mollo came on for Durban Ladies goal-getter Silindile Ngubane, and another Durban Ladies player, defender Charlotte Mshengu, made her debut, on for right-back Zamandosi Cele.
A period of extensive pressure on the Cameroonian final third resulted in Sister stabbing the ball home with just two minutes of play left.
Sister, who missed the previous two matches against Zimbabwe with a quadriceps injury, added much solidity to the visitors' rearguard, while in midfield Refiloe Jane was involved in the majority of possession won.
Playing in front of a small crowd in the 20,000-seater Omnisport Stadium, Banyana looked more attacking after the substitutions were made in the second half with Matlou, in particular, showing signs of the form that saw her score 55 goals in 78 outings.
Banyana will open their Group A campaign at the CAF African Women Championship 2012 against Equatorial Guinea in Malabo on October 28, before facing Senegal in the same city on October 31. The South Africans will then travel to Bata for their final group encounter with DR Congo on November 3.
The semi-finals will take place in either Malabo or Bata on November 7, with the 3rd/4th place play-off and the title decider both scheduled for Malabo on November 11.
"The match against Cameroon was just the type of physical encounter our players needed ahead of what should be a tough Group A fixture against hosts Equatorial Guinea at the CAF African Women Championship," said Mkhonza afterwards.
"Safa and our team sponsor Sasol need to be thanked for their support of the Banyana squad and I know the players will give their all at the African tournament.
"We were not outclassed today against Cameroon. We were competitive, and know which areas of our play to work on ahead of the tournament in Equatorial Guinea. We had our chances against Cameroon just like they did, but were kept out by some superb goalkeeping."