A test case can be run with actions from the test case being executed in multiple execution paths. This can be done with the aid of an action broker. For example, the broker may identify available automation implementations for the actions and use a priority list to select between available automation implementations for executing an action from the test case. The broker may also perform conversions of results of actions for use by implementations executing other actions in different execution paths, as well as passing results between implementations in different execution paths.