Swindon were 2-0 up at one point with first half goals from Steve Robinson, and Sam Parkin before Pompey pulled a goal back just before half time.
In the second half Pompey managed to hit the bar about three times before they finally managed to bit Bart Griemink to make it 2-2.
Swindon's team was:Griemink, Heywood, Miglioranzi, Viveash, Duke, Robinson, Igoe, Howard, Nicholas, Parkin, and Stevenson.
The attandance was 5,018. Swindon next friendly is on Monday night when the reserves travel to play Cirencester Town, and the next game at the County Ground is on Tuesday night against a Manchester United XI. Both of these games kick off at 7.30pm.
