diff --git a/core/modules/serialization/tests/src/Unit/Normalizer/EntityReferenceFieldItemNormalizerTest.php b/core/modules/serialization/tests/src/Unit/Normalizer/EntityReferenceFieldItemNormalizerTest.php
index 0a8fe938d7..a107250865 100644
--- a/core/modules/serialization/tests/src/Unit/Normalizer/EntityReferenceFieldItemNormalizerTest.php
+++ b/core/modules/serialization/tests/src/Unit/Normalizer/EntityReferenceFieldItemNormalizerTest.php
@@ -4,6 +4,8 @@
 
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\TypedData\Plugin\DataType\StringData;
+use Drupal\Core\TypedData\Type\StringInterface;
 use Drupal\Core\TypedData\TypedDataInterface;
 use Drupal\Core\Entity\EntityRepositoryInterface;
 use Drupal\Core\Entity\FieldableEntityInterface;
@@ -122,8 +124,8 @@ public function testNormalize() {
       ->willReturn($entity_reference)
       ->shouldBeCalled();
 
-    $this->fieldItem->getProperties(TRUE)
-      ->willReturn([])
+    $this->fieldItem->getExposedProperties()
+      ->willReturn(['target_id' => NULL])
       ->shouldBeCalled();
 
     $normalized = $this->normalizer->normalize($this->fieldItem->reveal());
@@ -150,8 +152,8 @@ public function testNormalizeWithNoEntity() {
       ->willReturn($entity_reference->reveal())
       ->shouldBeCalled();
 
-    $this->fieldItem->getProperties(TRUE)
-      ->willReturn([])
+    $this->fieldItem->getExposedProperties()
+      ->willReturn(['target_id' => NULL])
       ->shouldBeCalled();
 
     $normalized = $this->normalizer->normalize($this->fieldItem->reveal());