Sounds like tests depend on being executed in CET (central europe time), but Europe switched to CEST around that time (From 29th to 30th switch to CEST happened).
- Bug#1101831: mariadb: autopkgtest regression in testing Graham Inggs
- Bug#1101831: Dominik Stadler
- Bug#1101831: mariadb: autopkgtest regression in tes... Otto Kekäläinen
