diff --git a/project/Build.scala b/project/Build.scala
index d371ec7..88fa85c 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -58,7 +58,8 @@ object Build extends Build {
       ) ++
       test(
         scalatest,
-        sprayJsonShapeless
+        sprayJsonShapeless,
+        logback
       )
     )
 
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 1e5a245..d65d31b 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -7,6 +7,7 @@ object Dependencies {
   val jsonLenses    = "net.virtual-void"   %% "json-lenses"      % "0.6.1"
   val scalatest     = "org.scalatest"      %% "scalatest"        % "2.2.6"
   val base64        = "me.lessis"          %% "base64"           % "0.2.0"
+  val logback       = "ch.qos.logback"      % "logback-classic"  % "1.1.7"
 
   // Only used by the tests
   val sprayJsonShapeless = "com.github.fommil" %% "spray-json-shapeless" % "1.1.0"
diff --git a/stamina-json/src/test/scala/stamina/json/OverlappingPersistersSpec.scala b/stamina-json/src/test/scala/stamina/json/OverlappingPersistersSpec.scala
index a544757..8498745 100644
--- a/stamina-json/src/test/scala/stamina/json/OverlappingPersistersSpec.scala
+++ b/stamina-json/src/test/scala/stamina/json/OverlappingPersistersSpec.scala
@@ -23,7 +23,8 @@ class OverlappingPersisterSpec extends StaminaJsonSpec {
           persister[Event[Payload2]]("payload2")
         )
       }
-      e.getMessage() should be("requirement failed: Overlapping persisters: Persisters with keys 'payload1', 'payload2' all persist class stamina.json.OverlappingPersisterSpecDomain$Event.")
+      val className = s"stamina.json.OverlappingPersisterSpecDomain$$Event"
+      e.getMessage() should be(s"requirement failed: Overlapping persisters: Persisters with keys 'payload1', 'payload2' all persist class $className.")
 
       /**
        * When we actually want to support this situation, then this should work: