The country's second teaching union is meeting the Education Minister Michael Woods to make clear its objections to running the state exams without striking members of the ASTI.
The leadership of the TUI is voicing a number of concerns at the meeting in Dublin.
The TUI view is, to put it simply, that the exams would be unworkable without the ASTI.
However, the second teaching union is also expected to fire its own warning shot about pay - its members are due to meet later in the month and make their own wage demands.
That would leave the minister facing an attack on two fronts.
Meanwhile, with no breakthrough in sight, the countdown to the resumption of stoppages by the ASTI continues with schools in Dublin closed in six days time as the teachers start a wave of regional strikes.