Why does sbt say “bad symbolic reference…” for test with ScalaTest?

Question

I started using ScalaTest with sbt. The build.sbt is as follows:

name := \"MySpecSample\"

version := \"1.0\"

libraryDependencies  += \"org         


        

Answer 1

In your build.sbt you set the version of Scala to 2.10.3 with the following:

scalaVersion := "2.10.3" 

However the ScalaTest dependency uses Scala 2.11 explicitly (note the _2.11 part):

"org.scalatest" % "scalatest_2.11" % "2.2.0" % "test"

You have to use the same major scala version for both.

With sbt you can simply ensure this using %% instead of % as follows:

"org.scalatest" %% "scalatest" % "2.2.0" % "test"