core/modules/image/tests/src/Kernel/ImageItemTest.php |  2 +-
 .../EntityResource/Media/MediaResourceTestBase.php    | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/core/modules/image/tests/src/Kernel/ImageItemTest.php b/core/modules/image/tests/src/Kernel/ImageItemTest.php
index 951d190..c889537 100644
--- a/core/modules/image/tests/src/Kernel/ImageItemTest.php
+++ b/core/modules/image/tests/src/Kernel/ImageItemTest.php
@@ -119,7 +119,7 @@ public function testImageItem() {
     $entity->save();
 
     // Test image item properties.
-    $expected = ['target_id', 'entity', 'alt', 'title', 'width', 'height'];
+    $expected = ['target_id', 'entity', 'alt', 'title', 'width', 'height', 'image_styles'];
     $properties = $entity->getFieldDefinition('image_test')->getFieldStorageDefinition()->getPropertyDefinitions();
     $this->assertEqual(array_keys($properties), $expected);
 
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php
index 475a1ca..77d3560 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php
@@ -104,6 +104,8 @@ protected function createEntity() {
       ->setRevisionUserId(static::$auth ? $this->account->id() : 0)
       ->save();
 
+    $this->config('image.settings')->set('suppress_itok_output', TRUE)->save(TRUE);
+
     return $media;
   }
 
@@ -167,6 +169,23 @@ protected function getExpectedNormalizedEntity() {
           'target_uuid' => $thumbnail->uuid(),
           'title' => 'Llama',
           'url' => $thumbnail->url(),
+          'image_styles' => [
+            'large' => [
+              'url' => file_url_transform_relative(file_create_url('public://styles/large/public/media-icons/generic/generic.png')),
+              'height' => '180',
+              'width' => '180',
+            ],
+            'medium' => [
+              'url' => file_url_transform_relative(file_create_url('public://styles/medium/public/media-icons/generic/generic.png')),
+              'height' => '180',
+              'width' => '180',
+            ],
+            'thumbnail' => [
+              'url' => file_url_transform_relative(file_create_url('public://styles/thumbnail/public/media-icons/generic/generic.png')),
+              'height' => '100',
+              'width' => '100',
+            ],
+          ],
         ],
       ],
       'status' => [