Data-driven web tests can be long, especially if you need to navigate to a particular page before testing a different field value each time. In most cases, however, this is necessary, as it is unsafe to make assumptions about the state of the web page after a previous data-driven test. One effective way to speed them up, however, is to run them in parallel. You can configure ThucydidesParameterizedRunner tests to run in parallel by using the Concurrent annotation.

@RunWith(ThucydidesParameterizedRunner.class)
@Concurrent
public class WhenEnteringPersonalDetails {...

By default, this will run your tests concurrently, by default using two threads per CPU core. If you want to fine-tune the number of threads to be used, you can specify the threads annotation property.

@RunWith(ThucydidesParameterizedRunner.class)
@Concurrent(threads="4")
public class WhenEnteringPersonalDetails {...

You can also express this as a value relative to the number of available processors. For example, to run 4 threads per CPU, you could specify the following:

@RunWith(ThucydidesParameterizedRunner.class)
@Concurrent(threads="4x")
public class WhenEnteringPersonalDetails {...