Rob Street scored his first Newport goal as the Exiles turned on the style in the second half to record a vital 2-0 Sky Bet League Two win at Stevenage.
On-loan striker Street, whose only previous goal was for Crystal Palace Under-23s, broke the deadlock after 48 minutes.
The play-off chasing visitors won 5-0 in the reverse fixture in James Rowberry’s first home game in charge of County.
This time they had to settle for just two goals but still ensured relegation-threatened Stevenage are now winless in eight games.
Ryan Haynes made the points safe 20 minutes from time, striking a fine long-distance effort for his second goal of the campaign.
The win lifts Newport to third in the table, just one point adrift of second-placed Northampton.
Stevenage have collected only three points from a possible 24 and this latest defeat, coupled with Barrow’s 0-0 draw at Rochdale, drops Paul Tisdale’s side to third bottom, three points above the drop zone.