# customer_testing This tool checks out at the commit SHA specified in [`tests.version`](tests.version), and runs the tests registered to verify that end-user apps and libraries are working at the current tip-of-tree of Flutter. To (locally) test a specific SHA, use `ci.dart`: ```sh cd dev/customer_testing dart ci.dart [sha] ``` Or, to update the SHA for our CI, edit and send a PR for [`tests.version`](tests.version).