Scala / SBT / JUnit / Cucumber classpath problems?

I've recently downloaded Intellij 14.1.4 and installed the scala and cucumber for scala plugins.

I was following this tutorial (though using more recent dependency versions, as attached). i.e., create scala/sbt project, add dependencies (as attached) create test class (attached) to run cucumber, add HelloWorld.feature (attached), run test class... fails.

When attempting to run the JUnit test class from Intellij, it fails because for some reason the ".idea" folder is on the classpath at runtime, even though it's not marked as a source/resource directory.

Why might this be happening? Running the sbt test target (from the terminal) works fine, but obviously running a JUnit class works differently from within Intellij.

The stacktrace is as follows:
java.lang.IllegalArgumentException: Not a file or directory: ~/IdeaProjects/scala-cuke-test/.idea/modules/src/test/resources/features
 at cucumber.runtime.io.FileResourceIterator$FileIterator.<init>(FileResourceIterator.java:54)
 at cucumber.runtime.io.FileResourceIterator.<init>(FileResourceIterator.java:20)
 at cucumber.runtime.io.FileResourceIterable.iterator(FileResourceIterable.java:19)
 at cucumber.runtime.model.CucumberFeature.loadFromFeaturePath(CucumberFeature.java:103)
 at cucumber.runtime.model.CucumberFeature.load(CucumberFeature.java:54)
 at cucumber.runtime.model.CucumberFeature.load(CucumberFeature.java:34)
 at cucumber.runtime.RuntimeOptions.cucumberFeatures(RuntimeOptions.java:235)
 at cucumber.api.junit.Cucumber.<init>(Cucumber.java:60)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
 at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29)
 at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
 at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
 at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:41)
 at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
 at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)