"We received a letter yesterday from the laboratory in Florida that they are ready to conduct the carbon tests on the human bones found in the Matale grave," police spokesman and Superintendent Ajith Rohana said.
The carbon tests are required to determine the age of the bones discovered in the central district of Matale.
In November 2012, over 150 skeletal remains were found as the construction workers dug the ground to build a new wing for the Matale hospital.
The JVP launched a bloody rebellion in 1987-90 against the Indian intervention in Sri Lanka to broker an end to the conflict with the LTTE which had waged a war to carve out a separate Tamil homeland in the north and east of the country.
The brutal government crackdown on them resulted in the killings of thousands of their members.
They have demanded an independent investigation.