Swansea City manager Brendan Rodgers says they have proved to doubters that they possess the hard edge necessary to survive in the Premier League.
The Welsh side rode their luck at times away to Newcastle United on Saturday but dug deep for a 0-0 draw.
"It abandons any sort of theory that we're just a team that plays pretty football," Rodgers said.
"If you're not going to win the game then it's very important you don't lose it, and this was a real tonic for us."
Swansea have impressed with a passing style that usually sees Rodgers' side boss the possession statistics, but he is equally proud of their growing defensive prowess.
"That's our style, that's our identity, but we can defend," Rodgers added.
"To arrive in the Premier League and have eight clean sheets in 16 games is an outstanding record.
"Newcastle have had a terrific start to their season and with over 50,000 passionate Geordies, it's always a difficult place to come.
"But I thought the boys stood up to it brilliantly and as the game wore on we grew in terms of our possession and I thought we were outstanding.
"You need to earn the right to play, especially away from home. Everyone knows at home we're incredible, our confidence level, and away from home we've put in some terrific performances."
Swansea next face an equally tricky trip to Everton on Wednesday night, where they will be searching for their first away win of the season.
The two clubs are also rivals for the signature of Cliftonville striker Rory Donnelly, with the Irish club saying that the 19-year-old's future must be settled before Christmas Eve.
Swansea have had a bid of £100,000 accepted for Donnelly but Everton are expected to table their own offer.