The JUnit output window dosen't scroll to follow the output the way the application output window does. This doesn't scroll public class ScrollTest extends TestCase { public void testScroll() { for (int i = 0; i < 100; i++) { System.out.println(i); } } } This does public class TestScroll { public static void main(final String[] args) { for (int i = 0; i < 100; i++) { System.out.println(i); } } } }