diff --git a/litho-processor/src/main/java/com/facebook/litho/specmodels/model/testing/TestSpecModel.java b/litho-processor/src/main/java/com/facebook/litho/specmodels/model/testing/TestSpecModel.java
index 628832c7f9..1cd4333b80 100644
--- a/litho-processor/src/main/java/com/facebook/litho/specmodels/model/testing/TestSpecModel.java
+++ b/litho-processor/src/main/java/com/facebook/litho/specmodels/model/testing/TestSpecModel.java
@@ -17,6 +17,7 @@
 package com.facebook.litho.specmodels.model.testing;
 
 import androidx.annotation.VisibleForTesting;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.litho.specmodels.internal.ImmutableList;
 import com.facebook.litho.specmodels.internal.RunMode;
 import com.facebook.litho.specmodels.model.BuilderMethodModel;
@@ -55,6 +56,7 @@
 /**
  * Model that is an abstract representation of a {@link com.facebook.litho.annotations.TestSpec}.
  */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class TestSpecModel implements SpecModel, HasEnclosedSpecModel {
   private final SpecModel mSpecModel;
   private final TestSpecGenerator mTestSpecGenerator;
@@ -136,6 +138,7 @@ public ImmutableList<SpecMethodModel<EventMethod, EventDeclarationModel>> getTri
 
   @Override
   @Nullable
+  // NULLSAFE_FIXME[Inconsistent Subclass Return Annotation]
   public SpecMethodModel<EventMethod, Void> getWorkingRangeRegisterMethod() {
     return mSpecModel.getWorkingRangeRegisterMethod();
   }