organization  := "com.example"

version       := "0.1"

scalaVersion  := "2.10.3"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

resolvers ++= Seq(
  "spray repo" at "http://repo.spray.io/"
)

libraryDependencies ++= {
  val akkaV = "2.2.3"
  val sprayV = "1.2.0"
  Seq(
    "io.spray"            %   "spray-can"     % sprayV,
    "io.spray"            %   "spray-routing" % sprayV,
    "io.spray"            %   "spray-testkit" % sprayV  % "test",
    "com.typesafe.akka"   %%  "akka-actor"    % akkaV,
    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV   % "test",
    "org.specs2"          %%  "specs2-core"   % "2.3.7" % "test"
  )
}

seq(Revolver.settings: _*)

organization  := "com.example"

version       := "0.1"

scalaVersion  := "2.10.3"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

resolvers ++= Seq(
  "spray repo" at "http://repo.spray.io/"
)

libraryDependencies ++= {
  val akkaV = "2.2.3"
  val sprayV = "1.2.0"
  Seq(
    "io.spray"            %   "spray-can"     % sprayV,
    "io.spray"            %   "spray-routing" % sprayV,
    "io.spray"            %   "spray-testkit" % sprayV,
    "com.typesafe.akka"   %%  "akka-actor"    % akkaV,
    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV,
    "org.specs2"          %%  "specs2"        % "2.2.3" % "test"
  )
}

seq(Revolver.settings: _*)

--- 
+++ 
@@ -16,10 +16,10 @@
   Seq(
     "io.spray"            %   "spray-can"     % sprayV,
     "io.spray"            %   "spray-routing" % sprayV,
-    "io.spray"            %   "spray-testkit" % sprayV,
+    "io.spray"            %   "spray-testkit" % sprayV  % "test",
     "com.typesafe.akka"   %%  "akka-actor"    % akkaV,
-    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV,
-    "org.specs2"          %%  "specs2"        % "2.2.3" % "test"
+    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV   % "test",
+    "org.specs2"          %%  "specs2-core"   % "2.3.7" % "test"
   )
 }
 
Add all test libs to test scope.
Update specs2 version.