diff --git a/tests/modules/apigee_edge_test/src/Entity/OverriddenDeveloperApp.php b/tests/modules/apigee_edge_test/src/Entity/OverriddenDeveloperApp.php
index 868596a60..c95c026c0 100644
--- a/tests/modules/apigee_edge_test/src/Entity/OverriddenDeveloperApp.php
+++ b/tests/modules/apigee_edge_test/src/Entity/OverriddenDeveloperApp.php
@@ -39,6 +39,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type): a
       'Length' => [
         'min' => 1,
         'max' => 30,
+        'allowEmptyString' => TRUE
       ],
     ]);