scalatest not working in intellij 13.1

I can't seem to get Intellij 13.1 to run my tests. I've created a simple project to try and isolate the problem but it is also not working there. Here is my setup:

Intellij 13.1 Targeting JDK 1.6 (needed for java libraries being used)

SBT backed scala 2.10 project

latest scalatest (libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.1" % "test")

Here is the sut:

object Calc {
  def add(a: Int, b: Int) = {
    a + b
  }
}

Here is the test:

import org.scalatest.FunSuite

class Calc$Test extends FunSuite {
  test("two number should add") {
    assert(Calc.add(2, 5) == 7)
  }
}

This is the error I am getting:

Error:scalac: while compiling: /Users/test-user/Development/temp/sample/src/test/scala/Calc$Test.scala during phase: typer library version: version 2.10.4 compiler version: version 2.10.4 reconstructed args: -nobootcp -javabootclasspath : -classpath /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/deploy.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/dt.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/javaws.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/jce.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/jconsole.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/management-agent.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/plugin.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/sa-jdi.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/charsets.jar:/System/Library/Java/Jav aVirtualMachines/1.6.0.jdk/Contents/Classes/classes.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/jsse.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/ui.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/ext/apple_provider.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/ext/dnsns.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/ext/localedata.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/ext/sunjce_provider.jar:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/ext/sunpkcs11.jar:/Users/test-user/Development/temp/sample/target/scala-2.10/test-classes:/Users/test-user/Development/temp/sample/target/scala-2.10/classes:/Users/test-user/.sbt/boot/scala-2.10.4/lib/scala-library.jar:/Users/test-user/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.2.jar:/Users/test-user/.ivy2/cache/org.scala-lang/scala-reflect/ja rs/scala-reflect-2.11.2.jar:/Users/test-user/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.2.jar:/Users/test-user/.ivy2/cache/org.scalatest/scalatest_2.11/bundles/scalatest_2.11-2.2.1.jar:/Users/test-user/.sbt/boot/scala-2.10.4/lib/scala-reflect.jar:/Users/test-user/.sbt/boot/scala-2.10.4/lib/scala-compiler.jar last tree to typer: Apply(method ==) symbol: method == in class Int (flags: ) symbol definition: def ==(x: Int): Boolean tpe: Boolean symbol owners: method == -> class Int -> package scala context owners: value -> class Calc$Test -> package == Enclosing template or block == Template( // val : in class Calc$Test "FunSuite" // parents ValDef( private "_" ) // 2 statements DefDef( // def (): Calc$Test in class Calc$Test "" [] List(Nil) // tree.tpe=Calc$Test Block( // tree.tpe=Unit Apply( // def (): org.scalatest.FunSuite in class FunSuite, tree.tpe=org.scalatest.FunSuite Calc$Test.super."" // def (): org.scalatest.FunSuite in class FunSuite, tree.tpe= ()org.scalatest.FunSuite Nil ) () ) ) Apply( Apply( "test" "two number should add" ) Apply( "assert" Apply( // def ==(x: Int): Boolean in class Int, tree.tpe=Boolean Calc.add(2, 5)."$eq$eq" // def ==(x: Int): Boolean in class Int, tree.tpe=(x: Int)Boolean 7 ) ) ) ) == Expanded type of tree == TypeRef(TypeSymbol(final abstract class Boolean extends AnyVal)) uncaught exception during compilation: scala.MatchError

Any idea what the issue might be? I assume this is caused by a simple config problem as the code is about as simple as can be.

---

One problem you clearly have is that you're asking for the version of scalatest compiled for Scala 2.11, but you say you're using Scala 2.10. You need "scalatest_2.10" instead of "scalatest_2.11" in your build.sbt. Use

libraryDependencies += "org.scalatest" % "scalatest_2.10" % "2.2.1" % "test"

or perhaps even

libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.1" % "test"

to get your Scala version picked up automatically (note the change to to a double percent: %%.)

---

Since your project is 2.10 backed, use the same version for scalatest too,

scalaVersion := "2.10.5" // don't need to mention scalatest_2.10, will be reflected automatically

libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" // works with 2.2.1 or 3.0.0

libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % "test"

Or using maven,

<dependency>
    <groupId>org.scalactic</groupId>
    <artifactId>scalactic_2.10</artifactId>
    <version>3.0.0</version>
</dependency>

<dependency>
    <groupId>org.scalatest</groupId>
    <artifactId>scalatest_2.10</artifactId>
    <version>3.0.0</version>
    <scope>test</scope>
</dependency>

Reference here http://www.scalatest.org/install

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