Sinn Féin and its partners in Stormont's power-sharing government, the DUP, are at loggerheads over the proposed reform of Northern Ireland's education service.
In what is seen as a serious rift, First Minister and DUP leader Ian Paisley described the proposals of Education Minister Sinn Féin's Caitríona Ruane, as 'totally unacceptable'.
Dr Paisley also said the minister's plan did 'not form a basis for moving forward'.
It is Sinn Féin policy to end the test, known as the 11 Plus, which can be taken by primary school pupils before they transfer to secondary level.
The DUP wants to keep some form of academic streaming and a group of grammar schools has warned it will introduce its own form of testing if the 11 Plus is abolished.
The Education Minister wants to end the 11 Plus this year and she has warned there could be huge uncertainty for the education service, if there was no agreement for new arrangements.
Tonight Dr Paisley warned that schools must be able to select pupils on the basis of ability and said his party will accept nothing less.
Before the last power-sharing administration at Stormont collapsed, then Education Minister and current Deputy First Minister Martin McGuinness had promised to end the 11 Plus system.
