The Education Secretary is reportedly set to announce a major overhaul of GCSE exams.
Michael Gove will reveal plans for tougher O-level style qualifications on Tuesday, according to the Mail on Sunday.
The plans include getting rid of modular assessment, reintroducing the traditional three-hour exam at the end of two years of study and limiting the number of top grades that are awarded, the paper adds.
There has also been speculation that in future there would only be one exam board provider per subject after Mr Gove said last week that competition had had "malign effects".
The new system would be introduced from September 2015, with the first of the new-style exams taking place in 2017, the paper says.
The Department for Education refused to confirm the report but said announcement would be made shortly.
The reforms have placed a major strain on coalition relations after Mr Gove's plans to bring back O-levels were leaked in June before they had even been broached with Liberal Democrat Deputy Prime Minister Nick Clegg.
Documents showed that the Tory Education Secretary wanted to replace GCSEs with O-levels in traditional academic subjects such as English, maths, the humanities and science.
The changes would also see less able pupils taking simpler qualifications, similar to old-style CSEs, and the national curriculum for secondary schools abolished.
Teaching leaders have warned that such a move would see a return to "two-tier" schooling, writing off large swathes of the population, and the Lib Dems were infuriated by the idea.
Mr Clegg said neither he nor the Prime Minister, David Cameron, had been aware of the plans and indicated that they would not go ahead without Lib Dem support.
He said he was against "anything that would lead to a two-tier system where children at quite a young age are somehow cast on a scrapheap".
After extensive discussions about the proposals, however, Mr Clegg is expected to join Mr Gove in a show of unity at the launch of a consultation on the reforms.
