The 24-year-old is set to be an important member for Rafael Benitez's team as they prepare for a season in the Championship.
The 24-year-old came through the youth ranks at St James' Park, and even captained the reserve team occasionally. However, the Welshman has disclosed how he was once told by his old boss that he was not going to be making the step up into the first-team.
"Under Alan Pardew I was told I wouldn't play for Newcastle United or in the Premier League," he told the Chronicle.
"When he told me I replied that I wanted to prove him wrong. And he said: 'That's the attitude I like to hear'.
"With me I have that attitude that I don't give up. Two or three years ago I thought I'd never play in the first team."
Following the conversation, Dummett spent some time out on loan before returning to his parent club in 2013. And after proving himself at St Mirren especially, it was under Pardew that the full-back began to establish himself in the team.
Since making his league debut for Newcastle, the defender has made 66 appearances in the Premier League, established himself as one of the most consistent players in Rafael Benitez's side and made Wales' preliminary squad for the European Championship.
And Benitez will now be hoping that Dummett shows the same fighting spirit that he showed to win Pardew over to help the side get themselves out of the Championship at the earliest attempt.