diff --git a/org.eclipse.virgo.kernel.deployer/src/test/java/org/eclipse/virgo/kernel/deployer/model/internal/StandardRuntimeArtifactModelTests.java b/org.eclipse.virgo.kernel.deployer/src/test/java/org/eclipse/virgo/kernel/deployer/model/internal/StandardRuntimeArtifactModelTests.java
index 18290ed..b9814c0 100644
--- a/org.eclipse.virgo.kernel.deployer/src/test/java/org/eclipse/virgo/kernel/deployer/model/internal/StandardRuntimeArtifactModelTests.java
+++ b/org.eclipse.virgo.kernel.deployer/src/test/java/org/eclipse/virgo/kernel/deployer/model/internal/StandardRuntimeArtifactModelTests.java
@@ -135,10 +135,8 @@
     
     private static class StubInstallArtifact implements InstallArtifact {
 
-        private volatile GraphNode<InstallArtifact> graph;
-
         public GraphNode<InstallArtifact> getGraph() {
-            return this.graph;
+            return null;
         }
 
         public void stop() throws DeploymentException {