Why do the DC motor with the same PWM block in Arduino giving an output of different direction of motor rotation

I have set both dc motor the same value of pwm, but i kept getting the output different in terms of rotation of the motor. how can i get both dc motor moves forward with the same value of pwm?

[Mathieu NOE]

Are you sure the motors are wired with same polarity to the driver ?

if not, you can simply flip one motor wires and here you are turning in the opposite direction

[Noor Amira Ilyanie]

yes i'm sure the wire connection is correct. I had double check it.

[Mathieu NOE]

have you tested the motors for example with a simple lab power supply before connecting it to your board ?

maybe the motor supplier has made a mistake on the polarity