Adding JUnit jar to a gradle project

Hi,

I'm using Bobcat as automation framework, and it uses gradle to build it.

I want to use also the JUnit plugin so my test results are written into Spiratest.

I added the jar to the library of my project, in my editor everything looks fine, but if I run my tests it says 

/Users/macbookprobartvr/Documents/workspace/AEM/testbobcat1/src/test/java/be/vrt/aem/sporza/SporzaTestCase.java:14: error: package com.inflectra.spiratest.addons.junitextension does not exist
import com.inflectra.spiratest.addons.junitextension.*;

Does anyone have a idea?