junit-servers-core/src/main/java/com/github/mjeanroy/junit/servers/servers/AbstractEmbeddedServer.java
private void initEnvironment() {
		for (Map.Entry<String, String> property : configuration.getEnvProperties().entrySet()) {
			String name = property.getKey();
			String newValue = property.getValue();

			String oldValue = getProperty(property.getKey());
			oldProperties.put(name, oldValue);

			setProperty(name, newValue);
		}
	}
private void initEnvironment() {
		for (Map.Entry<String, String> property : configuration.getEnvProperties().entrySet()) {
			String name = property.getKey();
			String newValue = property.getValue();

			String oldValue = getProperty(property.getKey());
			oldProperties.put(name, oldValue);

			setProperty(name, newValue);
		}
	}
Add custom environment properties.
Initial property value will be store in {@link #oldProperties} map
and will be restore later.