.../ImageStyle/ImageStyleXmlAnonTest.php           | 34 +++++++++++++++++
 .../ImageStyle/ImageStyleXmlBasicAuthTest.php      | 44 ++++++++++++++++++++++
 .../ImageStyle/ImageStyleXmlCookieTest.php         | 39 +++++++++++++++++++
 3 files changed, 117 insertions(+)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlAnonTest.php b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlAnonTest.php
new file mode 100644
index 0000000..1714c27
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlAnonTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\ImageStyle;
+
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group rest
+ */
+class ImageStyleXmlAnonTest extends ImageStyleResourceTestBase {
+
+  use AnonResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testGet() {
+    // @todo Remove this method override in https://www.drupal.org/node/2905655
+    $this->markTestSkipped();
+  }
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlBasicAuthTest.php b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlBasicAuthTest.php
new file mode 100644
index 0000000..54febc6
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlBasicAuthTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\ImageStyle;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group rest
+ */
+class ImageStyleXmlBasicAuthTest extends ImageStyleResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testGet() {
+    // @todo Remove this method override in https://www.drupal.org/node/2905655
+    $this->markTestSkipped();
+  }
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlCookieTest.php b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlCookieTest.php
new file mode 100644
index 0000000..5cbb29a
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/ImageStyle/ImageStyleXmlCookieTest.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\ImageStyle;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group rest
+ */
+class ImageStyleXmlCookieTest extends ImageStyleResourceTestBase {
+
+  use CookieResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testGet() {
+    // @todo Remove this method override in https://www.drupal.org/node/2905655
+    $this->markTestSkipped();
+  }
+
+}