ADAM EUSTACE scored Gloucester's only try as Dean Ryan's side lost 19-7 against Llanelli.
Ludovic Mercier added the conversion but Ryan blamed a lack intensity for the defeat at Stradey Park.
"We have these pre-season games to highlight problems we don't want to encounter in the Premiership and in that respect it was very useful," Ryan said.
"But I was disappointed with the intensity levels we managed to bring to the game, particularly from our forward pack. We saw an improvement in the second half but by then it was too late.
"At times we also displayed a lack of creativity because we could have scored a number of times - but it was the lack of intensity that bothered me most.
"We need to make sure we create the right environment for the Premiership and that is what these games are for."
Ryan praised the contribution of prop Christian Califano as once again 'outstanding' and hopes next week to be able to welcome back Andy Hazell, Olly Morgan and Mike Tindall.
"I am sure when some of those guys are back in the squad our intensity levels will increase - that is what we are searching for and we want we need - it will be good to have these guys back involved," Ryan added.
Gloucester will await fitness reports to Haydn Thomas, Mefin Davies and James Simpson-Daniel following the defeat.
As Gloucester prepare for their 39th game of the season, against Bordeaux-Begles at Sixways on Sunday, David Humphreys told the local media that this week has been all about getting the players mentally and physically ready after a tough game against Connacht last Sunday.
Speaking to GRTV after the 40-32 victory over Connacht on Sunday, skipper Billy Twelvetrees explained that Gloucester had had to learn to be patient and cut out the errors to earn the win and progress to next weekend's final play-off against Bordeaux-Begles.
Jonny May's superb late score capped a thrilling 40-32 European play-off win over Connacht on Sunday. The winger spoke afterwards of his team's character and spirit as he looked ahead to one more week of rugby.
Speaking to GRTV this afternoon, Director of Rugby David Humphreys hailed the 'never say die' attitude of the team, after despite not being at their best, fighting back to take a 40-32 win after extra time over Connacht.
Jonny May continues on the wing on Sunday as Connacht come to town, and the England wing explains to the local media this week that he is delighted with his form and is looking forward to taking on Pat Lam's men.
Following the recent announcement that XBlades were to become the club's new kit and leisurewear partner, Gloucester Rugby can today (Tuesday 30 June) confirm the opening of a new retail unit, based at Gloucester Quays Outlet Centre, as well as the launch of a brand new online shop.
When the Gloucester Rugby squad and staff report for their first day of preseason training on Wednesday morning, they will be greeted with a new look training kit from XBlades Sports ready for the first sessions.