The tank farm has 08 tanks for marine fuel ranging from 3,000 cubic metres (two), 5,000 cubic metres (three) and 10,000 cubic metres (three).
It also has one 3,000 cubic metre tank and two 10,000 cubic metre tanks to store aviation fuel.
A tanker, M V Leon had unloaded a cargo marine gas oil this week.
"Accordingly, during the coming weeks the facility will be tested for accuracy and efficiency of pumps, lines and tanks for smoother bunker operations," Sri Lanka Ports Authority said in a statement.
"Once the testing is over, the facility will be made available for bunker operations.
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SLPA had said earlier that it would sell bunkers.