Treviso continue to upset the Magners League apple cart as they claimed their third victory this season, beating Dragons 20-13 on Friday.
Chris Burton crossed for a late match-winning try as Treviso returned to winning ways and inflicted a fourth defeat of the Magners League season on Dragons.
The Welsh side had been 13-3 down early on but rallied to level the scores thanks to tries from Scott Morgan and Phil Price.
But their hopes of a draw, or better, were dashed when Burton crossed in the 76th minute and Tobias Botes added the extras, leaving the Dragons with only a bonus point for their efforts.
Having lost to Welsh opposition last time out, when they were beaten by the Cardiff Blues, the Italians were looking for a strong response. They got it, bringing up a third win in five outings in this season's competition.
They fell behind in the 17th minute when Matthew Jones landed a penalty, but Burton responded with a drop goal three minutes later.
Treviso's Fabio Semenzato and Dragons centre Robert Sidoli were both sin-binned early on, and Botes kicked the home side ahead with a penalty after 27 minutes.
Italy international Robert Barbieri gave the home side breathing space with the first try of the match after 32 minutes, going over from close range as Treviso's forwards pushed for the line following a line-out. Botes booted the extras.
The visitors hit back two minutes before half-time when Morgan made the most of hard work from Aled Brew, who almost crossed himself, narrowing the gap to 13-8.
The scores were levelled after 65 minutes when full-back Price grabbed the second Dragons try of the night.
Botes might have kicked the hosts ahead soon afterwards but was off target, however it did not prove a costly miss as Brendan Williams, Alessandro Zanni and Ezio Galon combined to create the chance for Burton to score.
Tries: Barbieri, Burton
Cons: Botes 2
Tries: Morgan, Price
Pen: M. Jones
Yellow cards: Semenzato (Treviso - 18th min) ; Sidoli (Dragons - 26th min); Barbieri (Treviso - 57th min)
Treviso: 15 Tobias Botes, 14 Ludovico Nitoglia, 13 Ezio Galon, 12 Andrew Vilk, 11 Benjamin De Jager, 10 Kristopher Burton, 9 Fabio Semenzato, 8 Manoa Vosawai, 7 Paul Derbyshire, 6 Robert Barbieri, 5 Corniel Van Zyl, 4 Antonio Pavanello (c), 3 Lorenzo Cittadini, 2 Leonardo Ghiraldini, 1 Ignacio Fernandez Rouye.
Replacements: 16 Diego Vidal, 17 Franco Sbaraglini, 18 Pedro Di Santo, 19 Enrico Pavanello, 20 Alessandro Zanni, 21 Tommaso Benvenuti, 22 Simon Picone, 23 Brendan Williams.
Dragons: 15 Will Harries, 14 Adam Hughes, 13 Tom Cheeseman, 12 Tom Riley, 11 Aled Brew, 10 Matthew Jones, 9 Wayne Evans, 8 Andrew Coombs, 7 Robin Sowden-Taylor, 6 Dan Lydiate, 5 Scott Morgan, 4 Rob Sidoli, 3 Ben Castle, 2 Tom Willis (c), Phil Price.
Replacements: 16 Lloyd Burns, 17 Nigel Hall, 18 Hugh Gustafson, 19 Adam Jones, 20 Lewis Evans, 21 Matthew Evans, 22 Nicky Griffiths, 23 Ashley Smith.
Date: Friday, 1 October
Venue: Stadio di Monigo, Treviso
Referee: Neil Paterson (Scotland)
Assistant Referees: Alan Falzone (Italy), Stefano Traversi (Italy)
Television match official: Mauro Dordolo (Italy)