Injuries to Steffen Freund, Les Ferdinand, Christian Ziege and Teddy Sheringham's suspension has robbed Glenn of four regular starters for Wednesday's FA Cup clash at Coventry City.
Glenn early prediction was that Les and Christian, injured at Ipswich on Saturday, would be out for up to three weeks.
"Our squad will be tested," said Glenn. "We've got to come together and show a lot of character, whoever we're playing.
"Top, middle or bottom, we've got to pick up points and make sure we get back to winning ways.
"We've got some cup football coming up and that will be a different type of game. We have to get some consistency back.
"The squad is sparse and it will be a test for us to see if the players who are fit can churn out results while we get everyone back. That will be the test of everyone at the club."
Glenn Hoddle says the squad will tested in depth and character to the full in the coming weeks.