The workaround to the issue where the unit test cases do not run on play framework v2.1.3

Build.scala

import sbt._
import Keys._
import play.Project._

object ApplicationBuild extends Build {
    val appName         = "zentasks"
    val appVersion      = "1.0-SNAPSHOT"

    val appDependencies = Seq(
        // Add your project dependencies here,
        javaCore,
        javaJdbc,
        javaEbean
    )
    
    val main = play.Project(appName, appVersion, appDependencies).settings(
        // Add the below lines for unit test cases to work on v2.1.3
        testOptions in Test ~= { args =>
            for {
                arg <- args
                val ta: Tests.Argument = arg.asInstanceOf[Tests.Argument]
                val newArg = if(ta.framework == Some(TestFrameworks.JUnit)) ta.copy(args = List.empty[String]) else ta
            } yield newArg
        }      
    )

}