diff --git a/tests/src/Functional/DeveloperAppFieldTest.php b/tests/src/Functional/DeveloperAppFieldTest.php
index 8e9d3e96..0f5523a9 100644
--- a/tests/src/Functional/DeveloperAppFieldTest.php
+++ b/tests/src/Functional/DeveloperAppFieldTest.php
@@ -381,6 +381,11 @@ public function getEntityTypeId() {}
        */
       public function getEntityType() {}
 
+      /**
+       * {@inheritdoc}
+       */
+      public function restore(EntityInterface $entity) {}
+
     });
 
     foreach ($field_values as $field_name => $field_value) {