Mark Yates admitted Cheltenham were given a scare by non-league Luton - but believes his side's reaction is why they are currently flying high.
Cheltenham twice went ahead in their FA Cup second-round clash at Kenilworth Road through Darryl Duffy - who was sent off late on - and Marlon Pack, only for Hatters striker Aaron O'Connor to peg them back.
However, fine efforts from Luke Summerfield and Russell Penn settled it 4-2.
Yates, whose side are third in League Two, said: "It was a great game but we weren't as good as we have been and I think that's credit to Gary's team (Brabin, Luton boss). They put us under a lot of pressure and we know we've been in a real game against a really decent side.
"We're just delighted to be through. We stuck at it, we're made of strong stuff and on the chances I think we deserved to get through but they gave us one hell of a scare.
"The players have been magnificent all season, their attitude has been spot on and this game was about attitude and competing."