DB Migration tactics

Hello,  We are testing the waters for a DB migration.  ( MySQL to Amazon RDS ).  Within one of our environments, we plan to make a copy of our existing apps, and point the copies to the new DB for testing purposes.  

We realized this would entail updated all object references for the copied objects, which is labor intensive.  Is there a tool tailored for this scenario, or a better approach we could try?

Thanks.