Gloucester proved too strong for Kingsholm visitors the Scarlets in this pre-season encounter.
Fijian back-row Akapusi Qera ended the hosts early pressure with the opening try, Steven Shingler twice replying with penalties.
But a Jonny May try put the hosts 12-6 ahead at the break and Darren Dawidiuk and Ryan Mills went over in the second period.
Tim Taylor kicked three conversions for the Aviva Premierships side.
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