Question on wiring dishwasher

Hello. I've got a quick question. I have a 15 amp (afci protected) dedicated circuit for my dishwasher. I have 14/2 running from the breaker box to a junction box. From there o run into the floor and up underneath the dishwasher which will be direct wired. My question is, I just realized I used 12/2 wire from the box under the floor and up to the dishwasher location instead of 14/2.



Is this an issue. I'm sure it's not a fire hazard since 12/2 can handle 15 amps. I'm just wondering if this will be against code and this fail my inspection.



Thanks!