diff --git a/gcloud-java-core/src/main/java/com/google/cloud/BatchResult.java b/gcloud-java-core/src/main/java/com/google/cloud/BatchResult.java
index 3d5b06fd1db6..fb78409ea31e 100644
--- a/gcloud-java-core/src/main/java/com/google/cloud/BatchResult.java
+++ b/gcloud-java-core/src/main/java/com/google/cloud/BatchResult.java
@@ -34,7 +34,7 @@ public abstract class BatchResult<T, E extends BaseServiceException> {
   private T result;
   private boolean completed = false;
   private E error;
-  private List<Callback<T, E>> toBeNotified = new LinkedList<>();
+  private final List<Callback<T, E>> toBeNotified = new LinkedList<>();
 
   /**
    * Returns {@code true} if the batch has been completed and the result is available; {@code false}
diff --git a/gcloud-java-dns/src/test/java/com/google/cloud/dns/DnsBatchResultTest.java b/gcloud-java-dns/src/test/java/com/google/cloud/dns/DnsBatchResultTest.java
index c2b1c10b4741..96ca99cc9e3e 100644
--- a/gcloud-java-dns/src/test/java/com/google/cloud/dns/DnsBatchResultTest.java
+++ b/gcloud-java-dns/src/test/java/com/google/cloud/dns/DnsBatchResultTest.java
@@ -21,7 +21,6 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import com.google.cloud.BaseServiceException;
 import com.google.cloud.BatchResult;
 
 import org.easymock.EasyMock;