.../tests/src/Functional/EntityResource/EntityResourceTestBase.php    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index a07961c..94ca8f5 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -1319,10 +1319,10 @@ protected function makeNormalizationInvalid(array $normalization, $field_name) {
         $normalization[$label_field][1]['value'] = 'Second Title';
         break;
       case 'id':
-        $normalization['id'][0]['value'] = $this->anotherEntity->id();
+        $normalization[$this->entity->getEntityType()->getKey('id')][0]['value'] = $this->anotherEntity->id();
         break;
       case 'uuid':
-        $normalization['uuid'][0]['value'] = $this->anotherEntity->uuid();
+        $normalization[$this->entity->getEntityType()->getKey('uuid')][0]['value'] = $this->anotherEntity->uuid();
         break;
     }
     return $normalization;