Disclaimer: I work at xata. Xata is (like Heroku) based on Aurora, but offers database branching and has different pricing. That should be ideal for lightly-us

Disclaimer: I work at xata. Xata is (like Heroku) based on Aurora, but offers database branching and has different pricing. That should be ideal for lightly-used test instances, because you only pay for storage, and 15GB are included in the free tier.