Scenario is not the SuT
In section 2.2. we find "In this section we’ll try to detail how a scenario should be tested.". It is important to distinguish between the System under Test (SuT) which is the entity to be tested. In order to test the SuT, scenarios (as defined by OpenScenario) are being executed, and finally the result of the test (e.g. passed/failed) is derived. Therefore, a scenario is not at all tested.