src/test/java/test/testng285/Derived.java

package test.testng285;

import org.testng.annotations.Test;

public class Derived extends BugBase {
  
  @Test
  public void f1() {
    log(Thread.currentThread().getId());
  }

  @Test
  public void f2() {
    log(Thread.currentThread().getId());
  }
}