diff --git a/core/src/test/java/hudson/model/StubJob.java b/core/src/test/java/hudson/model/StubJob.java
index cc5224aae6a5a1ed873a359c61342c59960092f7..7f3b1dda7da4a42292ade521d7a3b4fc40a8d0bc 100644
--- a/core/src/test/java/hudson/model/StubJob.java
+++ b/core/src/test/java/hudson/model/StubJob.java
@@ -28,8 +28,9 @@ import java.util.SortedMap;
 
 /**
  * @author kingfai
- *
+ * @deprecated Does not behave very consistently. Either write a real functional test with {@code JenkinsRule}, or use PowerMock/Mockito.
  */
+@Deprecated
 @SuppressWarnings({ "rawtypes", "unchecked" })
 class StubJob extends Job {
 
@@ -69,4 +70,8 @@ class StubJob extends Job {
         
     }   
 
+    @Override public ItemGroup getParent() {
+        return null;
+    }
+
 }