You can use a @ClassRule
in your suite.
@RunWith(Suite.class)
@SuiteClasses({ Test1.class, Test2.class})
public class SuiteWithTimeout {
@ClassRule
public static Timeout timeout = new Timeout(1000);
}
Note, that the timeout will be per class (or per suite if you have nested them) not per test method.
Also have a look at this post.