diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestMapItemNormalizerTest.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestMapItemNormalizerTest.php
index a8ed8597de..754f7e1ab1 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestMapItemNormalizerTest.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestMapItemNormalizerTest.php
@@ -29,7 +29,6 @@ class EntityTestMapItemNormalizerTest extends EntityTestResourceTestBase {
     ],
   ];
 
-
   /**
    * {@inheritdoc}
    */
@@ -40,13 +39,8 @@ class EntityTestMapItemNormalizerTest extends EntityTestResourceTestBase {
    */
   protected function getExpectedNormalizedEntity() {
     $expected = parent::getExpectedNormalizedEntity();
-    // The 'non_exposed_value' property in test field type will not return in
-    // normalization because setExposed(TRUE) was not called for this property.
-    // @see \Drupal\entity_test\Plugin\Field\FieldType\ExposedPropertyTestFieldItem::propertyDefinitions
     $expected['field_map'] = [
-      [
-        'value' => static::$mapValue,
-      ],
+      0 => static::$mapValue
     ];
     return $expected;
   }
@@ -59,7 +53,7 @@ protected function createEntity() {
       FieldStorageConfig::create([
         'entity_type' => 'entity_test',
         'field_name' => 'field_map',
-        'type' => 'map_test',
+        'type' => 'map',
         'cardinality' => 1,
         'translatable' => FALSE,
       ])->save();
@@ -72,9 +66,7 @@ protected function createEntity() {
     }
 
     $entity = parent::createEntity();
-    $entity->field_map = [
-      'value' => static::$mapValue,
-    ];
+    $entity->get('field_map')->set(0, static::$mapValue);
     $entity->save();
     return $entity;
   }
@@ -85,9 +77,7 @@ protected function createEntity() {
   protected function getNormalizedPostEntity() {
     return parent::getNormalizedPostEntity() + [
       'field_map' => [
-        [
-          'value' => static::$mapValue,
-        ],
+        0 => static::$mapValue,
       ],
     ];
   }