Every time a bug is found I ask my team to write a unit test for it to prevent regression for that bug. During peer review I encourage Engineers to verify that

Every time a bug is found I ask my team to write a unit test for it to prevent regression for that bug. During peer review I encourage Engineers to verify that the actual business logic has been tested, for example calculations. If done correctly, a low unit test coverage can actually be of more quality than enforcing an 80% threshold