diff --git a/socha-sdk/src/test/sc/shared/GameResultTest.kt b/socha-sdk/src/test/sc/shared/GameResultTest.kt
new file mode 100644
index 000000000..e2fb34a62
--- /dev/null
+++ b/socha-sdk/src/test/sc/shared/GameResultTest.kt
@@ -0,0 +1,105 @@
+package sc.shared
+
+import com.thoughtworks.xstream.XStream
+import io.kotlintest.shouldBe
+import io.kotlintest.specs.StringSpec
+import sc.framework.plugins.Player
+
+class GameResultTest: StringSpec({
+    "convert XML" {
+        val xstream = XStream().apply {
+            setMode(XStream.NO_REFERENCES)
+        }
+        val definition = ScoreDefinition().apply { add("winner") }
+        val scores: List<PlayerScore> = listOf(
+                PlayerScore(ScoreCause.REGULAR, "test", 1),
+                PlayerScore(ScoreCause.LEFT, "second test", 0)
+        )
+        val winners: List<Player>? = listOf(Player(PlayerColor.BLUE, "bluez"))
+        
+        val gameResultWithWinner = Pair(
+                GameResult(definition, scores, winners), """
+               <sc.shared.GameResult>
+                 <definition>
+                   <fragments>
+                     <sc.shared.ScoreFragment>
+                       <name>winner</name>
+                       <aggregation>SUM</aggregation>
+                       <relevantForRanking>true</relevantForRanking>
+                     </sc.shared.ScoreFragment>
+                   </fragments>
+                 </definition>
+                 <scores class="java.util.Arrays${'$'}ArrayList">
+                   <a class="sc.shared.PlayerScore-array">
+                     <sc.shared.PlayerScore>
+                       <cause>REGULAR</cause>
+                       <reason>test</reason>
+                       <parts>
+                         <big-decimal>1</big-decimal>
+                       </parts>
+                     </sc.shared.PlayerScore>
+                     <sc.shared.PlayerScore>
+                       <cause>LEFT</cause>
+                       <reason>second test</reason>
+                       <parts>
+                         <big-decimal>0</big-decimal>
+                       </parts>
+                     </sc.shared.PlayerScore>
+                   </a>
+                 </scores>
+                 <winners class="singleton-list">
+                   <sc.framework.plugins.Player>
+                     <listeners/>
+                     <isCanTimeout>false</isCanTimeout>
+                     <isShouldBePaused>false</isShouldBePaused>
+                     <violated>false</violated>
+                     <left>false</left>
+                     <softTimeout>false</softTimeout>
+                     <hardTimeout>false</hardTimeout>
+                     <color>BLUE</color>
+                     <displayName>bluez</displayName>
+                   </sc.framework.plugins.Player>
+                 </winners>
+               </sc.shared.GameResult>""".trimIndent()
+        )
+        val gameResultWithoutWinner = Pair(
+                GameResult(definition, scores, emptyList()), """
+               <sc.shared.GameResult>
+                 <definition>
+                   <fragments>
+                     <sc.shared.ScoreFragment>
+                       <name>winner</name>
+                       <aggregation>SUM</aggregation>
+                       <relevantForRanking>true</relevantForRanking>
+                     </sc.shared.ScoreFragment>
+                   </fragments>
+                 </definition>
+                 <scores class="java.util.Arrays${'$'}ArrayList">
+                   <a class="sc.shared.PlayerScore-array">
+                     <sc.shared.PlayerScore>
+                       <cause>REGULAR</cause>
+                       <reason>test</reason>
+                       <parts>
+                         <big-decimal>1</big-decimal>
+                       </parts>
+                     </sc.shared.PlayerScore>
+                     <sc.shared.PlayerScore>
+                       <cause>LEFT</cause>
+                       <reason>second test</reason>
+                       <parts>
+                         <big-decimal>0</big-decimal>
+                       </parts>
+                     </sc.shared.PlayerScore>
+                   </a>
+                 </scores>
+                 <winners class="kotlin.collections.EmptyList"/>
+               </sc.shared.GameResult>""".trimIndent()
+        )
+        
+        val gameResults = listOf(gameResultWithWinner, gameResultWithoutWinner)
+        gameResults.forEach {
+            xstream.toXML(it.first) shouldBe it.second
+            xstream.fromXML(it.second) shouldBe it.first
+        }
+    }
+})
diff --git a/socha-sdk/src/test/sc/shared/PlayerScoreTest.kt b/socha-sdk/src/test/sc/shared/PlayerScoreTest.kt
index 3adfff148..e2fd0a390 100644
--- a/socha-sdk/src/test/sc/shared/PlayerScoreTest.kt
+++ b/socha-sdk/src/test/sc/shared/PlayerScoreTest.kt
@@ -1,6 +1,5 @@
 package sc.shared
 
-
 import com.thoughtworks.xstream.XStream
 import io.kotlintest.shouldBe
 import io.kotlintest.shouldNotBe
@@ -20,11 +19,10 @@ class PlayerScoreTest: StringSpec({
     }
     "convert XML" {
         val playerScore = PlayerScore(ScoreCause.REGULAR, "Reason", 0, 1, 2)
-        var xstream = XStream()
-        xstream.setMode(XStream.NO_REFERENCES)
-        xstream.classLoader = PlayerScore::class.java.classLoader
-        val ISplayerScoreXML = xstream.toXML(playerScore)
-        val SHOULDplayerScoreXML = """
+        val xstream = XStream().apply {
+            setMode(XStream.NO_REFERENCES)
+        }
+        val playerScoreXML = """
             <sc.shared.PlayerScore>
               <cause>REGULAR</cause>
               <reason>Reason</reason>
@@ -34,8 +32,7 @@ class PlayerScoreTest: StringSpec({
                 <big-decimal>2</big-decimal>
               </parts>
             </sc.shared.PlayerScore>""".trimIndent()
-        playerScore shouldBe xstream.fromXML(SHOULDplayerScoreXML)
-        playerScore shouldBe xstream.fromXML(ISplayerScoreXML)
-        ISplayerScoreXML shouldBe SHOULDplayerScoreXML
+        xstream.fromXML(playerScoreXML) shouldBe playerScore
+        xstream.toXML(playerScore) shouldBe playerScoreXML
     }
 })
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