junit-servers-core/src/main/java/com/github/mjeanroy/junit/servers/servers/AbstractConfigurationBuilder.java
public T withParentClasspath(URL classpath, URL... others) {
		Set<URL> classpathUrls = new HashSet<>();
		classpathUrls.add(classpath);
		Collections.addAll(classpathUrls, others);
		return withParentClasspath(classpathUrls);
	}
public T withParentClasspath(URL classpath, URL... others) {
		Set<URL> classpathUrls = new HashSet<>();
		classpathUrls.add(classpath);
		Collections.addAll(classpathUrls, others);
		return withParentClasspath(classpathUrls);
	}
Change {@link #parentClassLoader} value.

@param classpath New classpath entry.
@param others Other (optional) classpath urls.
@return this