ATLANTA --- Georgia Tech's talk of a simplified approach on defense is causing Virginia Tech coach Frank Beamer to wonder what changes are coming this week.

For Georgia Tech coach Paul Johnson, almost any change on defense would be welcome.

The No. 19 Yellow Jackets have allowed a combined 75 points in their past two games but somehow have managed to win both.

Johnson says his defense will need better production against No. 4 Virginia Tech on Saturday night, prompting Beamer to say the Yellow Jackets are "difficult to prepare for."

Johnson says the unit didn't play as poorly as it seemed while giving up more than 400 yards in the first half of last week's 49-44 win at Florida State.

Earlier in the season, the Yellow Jackets survived a 30-27 win over Clemson.

Johnson has called for a less complicated approach on defense.

Beamer says he's not sure if Georgia Tech's defensive schemes he sees on game film will be what he sees at Bobby Dodd Stadium.

"I know they talked about maybe cutting back on their schemes a little bit, but they're difficult to prepare for because you're not sure where they're going with this," Beamer said.

"The defense gives you a lot of looks. They change up from week to week, and they change up in their scheme. They have got some eight-man front principles, and then they can go back to the two-deep."

Johnson says picking a defensive look is not as important as proper execution.

"I think it's no secret we've got to play better," he said. "When you watch the tape, in my mind when you play like that, everybody is accountable. The guys one the field are accountable. The coaches are accountable but No. 1, I'm accountable because I'm the No. 1 guy."

Georgia Tech (5-1 overall, 3-1 Atlantic Coast Conference) has allowed 27 or more points in four of its six games.

The Yellow Jackets rank ninth in the ACC in scoring defense, allowing 26.5 points per game. Virginia Tech gives up an average of 17.7 points per game, second in the league.