import com.carrotsearch.randomizedtesting.RandomizedRunner; import com.carrotsearch.randomizedtesting.annotations.*; @RunWith(RandomizedRunner.class) public class MyLibraryTest { @Test @Repeat(iterations = 10) public void testRandomBehaviour(@RandomSeed long seed) { MyLibrary library = new MyLibrary(); // ... } } import com.carrotsearch.randomizedtesting.RandomizedRunner; import com.carrotsearch.randomizedtesting.RandomizedTest; import com.carrotsearch.randomizedtesting.annotations.*; @RunWith(RandomizedRunner.class) @SeedDecorators({ CoolSeedDecorator.class }) public class MyLibraryTest extends RandomizedTest { @SeedDecorators({ HotSeedDecorator.class }) @Test @Repeat(iterations = 100) public void testRandomBehaviour(@RandomInt(min = 1, max = 100) int randomNumber) { // ... } }