Off the back of two defeats by Rangers and a shock Europa League loss against Ferencvaros, there were question marks over Martin O'Neill's desire to continue in the Celtic dugout.
After a period of reflection, the 74-year-old last week insisted he was "just as determined now than ever before" to lead the club and the win at Fir Park was O'Neill's 250th in a glittering Celtic career that stretches back to 2000.
Amid yet more fan protests against major shareholder Dermot Desmond, Celtic's result and the performance provided a much-needed tonic for O'Neill and the travelling support.
Yes, there could and probably should have been more goals and club-record signing Kasper Hogh's wait for a goal goes on - the Dane has only scored in one of his first 10 Celtic appearances - but this was a dominant performance.
Mika Baur was excellent in the middle of the park after making his Germany debut earlier this month and was unfortunate not to score when a clever flick from close range hit the bar.
Perhaps the most heartening moment of the afternoon for those of a Celtic persuasion came with 15 minutes to go as Jota made his first appearance in almost 18 months.
The roar from the away end as the Portuguese winger came off the bench spoke volumes. It will undoubtedly take time for him to get back up to speed after such a long injury lay-off, but a fully-fit Jota would bring the quality O'Neill has craved since he returned to the Celtic hotseat.
Sterner tests await with Benfica and Celta Vigo in the Europa League either side of a league clash with Hearts, but Celtic did what they had to at Fir Park.