Kimani Stewart-Baynes notched his first collegiate goal and assist as the Terps recorded their first win of 2023.
The Terps will take on No. 14 Cornell Sunday in the second round of the NCAA tournament.
Johnston's versatility has been a bonus for the Terps early in their campaign.
The Terps couldn't cash in on a host of opportunities in their second game of the season.
Freshman Caden Stafford scored the lone goal of the match, opening his Terp career on a high note.
The win snapped the Terps three-game skid.
Fielding an inexperienced lineup, the Terps gave up two penalties and a host of fouls against the Scarlet Knights.
Jacen Russell-Rowe and Joe Suchecki each scored, while Ben Bender impressed in the midfield.
The Terps fell behind 3-0 after 30 minutes, doomed by early mistakes and ruthless Nittany Lions finishing.
The Terps added two midfielders and a goalkeeper.