Changes to the apple/stable/* branches require a passing pull request before they can be merged. Please note that we're still resolving a couple of test failures that happen on the apple/stable/20190619 branch, so you won't be able to merge the PRs until they're resolved. I'm aiming to fix those test failures by tomorrow.
Changes to the apple/master and the swift/master-next branch right now aren't gated by a passing pull request yet. However, we will start enforcing a build/test requirement for these branches this week as well, so please create a pull request when targeting these branches, and please see if you can trigger @swift-ci test to verify that your PR builds as expected.