After losing their first nine games of the season, the AFC South side have won three of their last four contests, included their divisional clash with the Texans two weeks ago.
The Houston head coach told reporters: "They're playing extremely hard. I think they played they really well, especially this past month. They got after us pretty good.
"[We] really struggled to move the ball, struggled in some protections and stuff. Like I said, what have they won, three out of their last four? Something like that. Gus [Bradley] does a good job. He's a hell of a football coach. Getting started there, he's got their mindset the way he wants it.
"You see a team that's playing hard and doing a good job. They're reaping the benefits of that here in late in the season. Very impressed."
The Texans have lost their last 10 games.