After children found out their grades last week, it emerged tens of thousands had been lowered by the exam board.
The Scottish education secretary said on Tuesday these results would go back to the original teacher estimate.
Scotland cancelled exams this year for the first time in history over the coronavirus pandemic.
A new grading system was put in place, which saw teachers' estimates of pupils' attainment moderated by the Scottish Qualifications Authority (SQA).
This was based on criteria including the past performance of schools.
It resulted in 124,564 exam results being downgraded - about a quarter of all grades handed out by the SQA this year.
However, John Swinney, the Scottish education secretary, said this would no longer be the case.
"I can confirm to parliament today that all downgraded awards will be withdrawn," he said on Tuesday.