Suarez bagged the equaliser against Chelsea on Sunday to earn the Reds a point and take his Premier League tally for the season to eight goals in 11 matches.
The Uruguayan is now the joint-top scorer in the division along with Manchester United star Robin van Persie.
"Luis is a great player and he doing a fantastic job for us," Johnson told Liverpool's official website. "He's scoring goals for fun at the moment and the longer he does that the happier we will be."
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Johnson was satisfied to earn a draw from the match at Stamford Bridge and credited Liverpool for continuing to fight for a result after they had fallen behind.
The England full-back was left wondering, however, if the Reds should have won the game after they finished the contest strongly following Suarez's equaliser.
"If we had been offered a point before the game, we probably would have taken it," the ex-Blues player admitted.
"Playing away at Stamford Bridge, it was always going to be difficult. Chelsea are very strong at home and we were expecting a tough game.
"We didn't start well, they got the goal and usually when Chelsea go in front here they win. A lot of teams would have rolled over and ended up getting destroyed by four or five.
"But we have a great spirit in the dressing room and a lot of heart. We always fight to the death. We did that and got our reward.
"They had a tough game in Europe in the week and I think that showed in the last 15 minutes as Chelsea tired a little bit.
"We were strong and in the closing stages we really drove at them. We could have got all three points in the end but overall I think we've got to be happy with the draw."