# Turn Test Tuning
Turn test is just a check to ensure that your track width isn't waaay off.
- Run the
TurnTestopmode via the RC.
- By default, your
TurnTestshould turn your bot 90 degrees.
- The bot may not turn exactly 90 degrees. This may be due to some slight feedforward discrepancy.
- If it doesn't, go to your
TurnTest.javaopmode in Android Studio. Change the
ANGLEvariable to 180 degrees.
- Re-run the opmode. It should turn exactly 180 degrees if you tuned the track width properly.
- If not, re-tune track width. Don't worry about the error at 90 degree turns. That will be fixed later once we tune the heading PID.