Johnston had a goal and an assist in Wednesday's 5-2 win over the Sharks.
Johnston scored a power-play goal on eight shots in Monday's 7-1 win over the Penguins.
Johnston (undisclosed), as expected, will be in the lineup to face Nashville on Thursday, Brian Rea of Bally Sports Southwest reports.
Johnston, who is dealing with an undisclosed injury, is still expected to suit up versus Nashville on Thursday, Stars radio analyst Bruce LeVine reports.
Johnston scored two goals on eight shots, added an assist and went plus-2 in Monday's 5-1 win over the Avalanche in Game 4.
Johnston earned a pair of assists in a 3-2 win over the Golden Knights in Game 5 on Wednesday.
Johnston scored a goal and added two PIM in Saturday's 4-1 win over the Kings.
Johnston tallied a goal and an assist in Tuesday's 4-3 loss to the Panthers.
Johnston recorded a hat trick, two assists, six shots on goal and a plus-2 rating in Tuesday's 7-6 overtime win over the Sharks.
Johnston posted an assist and five shots on goal in Thursday's 4-1 win over the Jets.