diff --git a/imagepipeline-base-test/src/main/java/com/facebook/imagepipeline/testing/TestExecutorService.java b/imagepipeline-base-test/src/main/java/com/facebook/imagepipeline/testing/TestExecutorService.java
index 03ea747664..4b33ebc47e 100644
--- a/imagepipeline-base-test/src/main/java/com/facebook/imagepipeline/testing/TestExecutorService.java
+++ b/imagepipeline-base-test/src/main/java/com/facebook/imagepipeline/testing/TestExecutorService.java
@@ -14,6 +14,7 @@
 import java.util.concurrent.Callable;
 import java.util.concurrent.RunnableFuture;
 import java.util.concurrent.TimeUnit;
+import javax.annotation.Nullable;
 
 /** Implementation of {@link java.util.concurrent.ExecutorService} for unit tests. */
 @Nullsafe(Nullsafe.Mode.LOCAL)
@@ -43,9 +44,10 @@ public ScheduledQueue getScheduledQueue() {
   @Override
   public void shutdown() {}
 
+  @Nullable
   @Override
+  // NULLSAFE_FIXME[Inconsistent Subclass Return Annotation]
   public List<Runnable> shutdownNow() {
-    // NULLSAFE_FIXME[Return Not Nullable]
     return null;
   }