As of commit 3044839456 tests that return something other than the prescribed success atom 'pass' to indicate success result in test failure. Change tests that return the atom 'ok' or some other value to instead return 'pass' to indicate success.
3044839456
adds rt:capability/3 and rt:wait_until_capability/4 that can take default capability value (using riak_core_capability:get/2).