Simo Valakari will have enjoyed his first stint on the bench as St Johnstone manager after Nicky Clark's late strike sealed all three points for the visitors.
Simon Murray gave Dundee a first half lead after a bizarre defensive gaffe before substitute Graham Carey's superb strike levelled things up.
A SIX MINUTE, 30 SECOND VAR review for the winning goal could only postpone the jubilant Perth celebrations at full time. It is the first back-to-back league wins for St Johnstone in two years.
The team was unchanged from the side that beat Ross County 3-0 the previous weekend with Clark supporting the attacking partnership of Adama Sidibeh and Benji Kimpioka.
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