The one-goal lead was more than enough for goalkeeper Victoria Esson, who recorded her 13th shutout of the season in the win.
Texas Tech finishes the regular season with a record of 16-1-2 and 6-0-2 in Big 12 play. It's the first time in program history they have finished conference play unbeaten.
Head coach Tom Stone was serving a one-game suspension from the NCAA for exceeding his yellow card limit for the season.
The Red Raiders are the two-seed in the upcoming Big 12 Championships.
They open play with seven-seed TCU on Nov. 6 at 8 p.m. at the Swope Soccer Village in Kansas City.