Grails 3.0.3, Error running intrgration test using test-app

I am using Grails 3.0.3, and added an integration test using create-integration-test and getting this error with both application.yml and application.groovy.

java.lang.IllegalStateException
        Caused by: org.springframework.beans.factory.BeanCreationException
            Caused by: org.springframework.beans.factory.BeanCreationException
                Caused by org.springframework.beans.factory.BeanCreationException
                    Caused by: java.lang.NullPointerException

Can you please help? Basically I want to know how to do integration test with Grails 3.0.3?