Logging test results of scalatest/Junit to reportportal

I am using scalatest with JunitRunner and want the tests to get logged into reportportal. Am using gradle as the build tool. Tried using https://github.com/reportportal/agent-scala-scalatest but no luck. The gradle example given there (args = ['-C', 'com.epam.reportportal.scalatest.RPReporter'] does not work when running tests using Junit. Any help would be appreciated.