Jane Davidson, Assembly minister for education and lifelong learning, last week announced that a review of tests for 11 and 14 - year-olds would begin before the summer recess.
Unions in Wales have consistently campaigned for such a move but now claim the testing review group, which is expected to report back by early 2004, is a waste of time and money.
Geraint Davies, Welsh secretary of the National Association of Schoolmasters Union of Women Teachers, said: "Rather than organising a committee, the minister should have scrapped the tests."
Each test costs pound;8 million to administer in Wales and Rhys Williams, of the National Union of Teachers in Wales, believes the money could be better spent elsewhere. "There's a strong argument for removing tests at KS2," he said.
Nationally, though, unions welcomed the review. Eamonn O'Kane, NASUWT general secretary, believes it could have far-reaching implications.
He said: "Maybe the Welsh have a strong view on this, but they don't necessarily see the wider picture. This could have important repercussions for England. We hope Charles Clarke, the Education Secretary, will take notice."