http://junit.org: JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck. (JUnit)
  • David Saff
  • Kevin Cooney
  • Stefan Birkner
  • Marc Philipp 
package org.junit.internal.builders;

import org.junit.runner.Runner;
import org.junit.runners.model.RunnerBuilder;

public class NullBuilder extends RunnerBuilder {
    @Override
    public Runner runnerForClass(Class<?> each) throws Throwable {
        return null;
    }
}