diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/Overrides/carousel.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/Overrides/carousel.php
new file mode 100644
index 0000000000000000000000000000000000000000..d8f4ec4e384632eeb5e0874ecaa7156eaba8b170
--- /dev/null
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/Overrides/carousel.php
@@ -0,0 +1,43 @@
+<?php
+
+// Add a Content Type called "test_carousel"
+$CType = 'test_carousel';
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTcaSelectItem(
+    'tt_content',
+    'CType',
+    [
+        'label' => 'Carousel',
+        'value' => $CType,
+        'icon' => 'content-carousel-item-textandimage',
+        'group' => 'default',
+    ],
+    'textmedia',
+    'after'
+);
+
+// Add a new icon
+$GLOBALS['TCA']['tt_content']['ctrl']['typeicon_classes'][$CType] = 'content-carousel-item-textandimage';
+// Add the "showitem" type
+$GLOBALS['TCA']['tt_content']['types'][$CType] = $GLOBALS['TCA']['tt_content']['types']['header'];
+
+// Add a new relational field for carousel_item DB table
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns(
+    'tt_content',
+    [
+        'carousel_items' => [
+            'label' => 'Carousel Items',
+            'config' => [
+                'type' => 'inline',
+                'foreign_table' => 'test_content_carousel_item',
+                'foreign_field' => 'carousel_content_element',
+            ],
+        ],
+    ]
+);
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes(
+    'tt_content',
+    'carousel_items',
+    $CType,
+    // after a palette or tab would be "cool"
+    'after:header',
+);
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/test_content_carousel_item.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/test_content_carousel_item.php
new file mode 100644
index 0000000000000000000000000000000000000000..22f691104fd58fa9c11911ceb7cc7c71d0b19434
--- /dev/null
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/Configuration/TCA/test_content_carousel_item.php
@@ -0,0 +1,68 @@
+<?php
+
+return [
+    'ctrl' => [
+        'title' => 'Carousel Item',
+        'label' => 'header',
+        'label_alt' => 'header_link',
+        'label_alt_force' => 1,
+        'default_sortby' => 'ORDER BY header',
+        'tstamp' => 'tstamp',
+        'crdate' => 'crdate',
+        'delete' => 'deleted',
+        'languageField' => 'sys_language_uid',
+        'enablecolumns' => [
+            'disabled' => 'hidden',
+        ],
+        'security' => [
+            'ignorePageTypeRestriction' => true,
+        ],
+        'iconfile' => 'EXT:core/Resources/Public/Icons/T3Icons/content/content-carousel.svg',
+    ],
+    'columns' => [
+        'header' => [
+            'label' => 'Header',
+            'config' => [
+                'type' => 'input',
+            ],
+        ],
+        'header_link' => [
+            'label' => 'Header Link',
+            'config' => [
+                'type' => 'link',
+            ],
+        ],
+        'bodytext' => [
+            'label' => 'Bodytext',
+            'config' => [
+                'type' => 'text',
+                'enableRichtext' => true,
+                'cols' => 40,
+                'rows' => 15,
+            ],
+        ],
+        'carousel_content_element' => [
+            'label' => 'Content Element',
+            'config' => [
+                'type' => 'passthrough',
+            ],
+        ],
+        'image' => [
+            'label' => 'Image',
+            'config' => [
+                'type' => 'file',
+                'maxitems' => 1,
+            ],
+        ],
+    ],
+    'types' => [
+        '0' => [
+            'showitem' => 'header, header_link, bodytext, image',
+        ],
+    ],
+    'palettes' => [
+        'language' => [
+            'showitem' => 'sys_language_uid, l10n_parent',
+        ],
+    ],
+];
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/composer.json
new file mode 100644
index 0000000000000000000000000000000000000000..5276ec8641660b400ba66c418da722827d6669d4
--- /dev/null
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/composer.json
@@ -0,0 +1,14 @@
+{
+	"name": "typo3tests/test-classic-content",
+	"type": "typo3-cms-extension",
+	"description": "This extension adds example tt_content CTypes",
+	"license": "GPL-2.0-or-later",
+	"require": {
+		"typo3/cms-core": "13.3.*@dev"
+	},
+	"extra": {
+		"typo3/cms": {
+			"extension-key": "test_classic_content"
+		}
+	}
+}
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/ext_emconf.php b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/ext_emconf.php
new file mode 100644
index 0000000000000000000000000000000000000000..d64b732fc4bfbca7bc85920ea07e8bbab346ad0d
--- /dev/null
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content/ext_emconf.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+$EM_CONF[$_EXTKEY] = [
+    'title' => 'This extension adds example tt_content CTypes.',
+    'description' => 'This extension adds example tt_content CTypes.',
+    'category' => 'example',
+    'version' => '13.3.0',
+    'state' => 'stable',
+    'author' => 'Benni Mack',
+    'author_email' => 'benniYYYY@typo3.org',
+    'author_company' => '',
+    'constraints' => [
+        'depends' => [
+            'typo3' => '13.3.0',
+        ],
+        'conflicts' => [],
+        'suggests' => [],
+    ],
+];
diff --git a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/ContentScenario.yaml b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/ContentScenario.yaml
index dc6d1b4892c40c04d11023124ee0b4b600a81397..c3615189cce13c8aebb1dee766b3fb3be284adeb 100644
--- a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/ContentScenario.yaml
+++ b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/ContentScenario.yaml
@@ -33,6 +33,9 @@ entitySettings:
         aside: {colPos: 2}
         footer: {colPos: 5}
         flashInfo: {colPos: 10}
+  carousel_items:
+    tableName: 'test_content_carousel_item'
+    languageColumnNames: ['l10n_parent']
 
 entities:
   page:
@@ -40,8 +43,12 @@ entities:
       entities:
         content:
           - self: {title: 'Welcome to ACME guitars', type: *contentText, area: 'stage'}
+          - self: {id: 234, title: 'Our latest and greatest products', type: 'test_carousel', area: 'stage', carousel_items: '1,2'}
           - self: {text: '<p>Great to see you here</p>', type: *contentText, area: 'main'}
           - self: {text: '<p>If you read this you are at the end.</p>', type: *contentText, area: 'footer'}
+        carousel_items:
+          - self: {header: 'Meet us at Guitar Brussels in 2035', carousel_content_element: 234}
+          - self: {header: 'Check out our latest Hero guitars', carousel_content_element: 234}
       children:
         - self: {id: 1100, title: 'Our Products', slug: '/products', backendLayout: 'default'}
           entities:
diff --git a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/PageContentProcessor/Partials/SingleContent.html b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/PageContentProcessor/Partials/SingleContent.html
index 3b93ad1a45014b848d2016be888bf75df388040a..c4b93052867ffc4cea4d5cd2fe1763aa78552d11 100644
--- a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/PageContentProcessor/Partials/SingleContent.html
+++ b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/PageContentProcessor/Partials/SingleContent.html
@@ -3,4 +3,8 @@
         <h3>{record.header}</h3>
         <p>{record.bodytext}</p>
     </f:case>
+    <f:case value="test_carousel">
+        <h3>{record.header}</h3>
+        <p>Carousel Items will show up: {record.carousel_items}</p>
+    </f:case>
 </f:switch>
diff --git a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/RecordTransform/Partials/SingleContent.html b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/RecordTransform/Partials/SingleContent.html
index 3b93ad1a45014b848d2016be888bf75df388040a..c4b93052867ffc4cea4d5cd2fe1763aa78552d11 100644
--- a/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/RecordTransform/Partials/SingleContent.html
+++ b/typo3/sysext/frontend/Tests/Functional/DataProcessing/Fixtures/RecordTransform/Partials/SingleContent.html
@@ -3,4 +3,8 @@
         <h3>{record.header}</h3>
         <p>{record.bodytext}</p>
     </f:case>
+    <f:case value="test_carousel">
+        <h3>{record.header}</h3>
+        <p>Carousel Items will show up: {record.carousel_items}</p>
+    </f:case>
 </f:switch>
diff --git a/typo3/sysext/frontend/Tests/Functional/DataProcessing/PageContentFetchingProcessorTest.php b/typo3/sysext/frontend/Tests/Functional/DataProcessing/PageContentFetchingProcessorTest.php
index f1cec9890db548790448836fcb5fd8ebe25eec56..a57486f9c8bdce25c334f76abd438ac8baca0700 100644
--- a/typo3/sysext/frontend/Tests/Functional/DataProcessing/PageContentFetchingProcessorTest.php
+++ b/typo3/sysext/frontend/Tests/Functional/DataProcessing/PageContentFetchingProcessorTest.php
@@ -34,6 +34,10 @@ final class PageContentFetchingProcessorTest extends FunctionalTestCase
         'EN' => ['id' => 0, 'title' => 'English', 'locale' => 'en-US'],
     ];
 
+    protected array $testExtensionsToLoad = [
+        'typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content',
+    ];
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -76,6 +80,7 @@ final class PageContentFetchingProcessorTest extends FunctionalTestCase
         $response = $this->executeFrontendSubRequest((new InternalRequest('https://acme.com/'))->withPageId(1000));
         $body = (string)$response->getBody();
         self::assertStringContainsString('Welcome to ACME guitars', $body);
+        self::assertStringContainsString('Carousel Items will show up: 2', $body);
         self::assertStringContainsString('Great to see you here', $body);
         self::assertStringContainsString('If you read this you are at the end.', $body);
     }
diff --git a/typo3/sysext/frontend/Tests/Functional/DataProcessing/RecordTransformationProcessorTest.php b/typo3/sysext/frontend/Tests/Functional/DataProcessing/RecordTransformationProcessorTest.php
index 95c60af23e88772a2ed1b563fec5779f184612cd..1f3ac93adf97bddf25863bea5068829dd680f931 100644
--- a/typo3/sysext/frontend/Tests/Functional/DataProcessing/RecordTransformationProcessorTest.php
+++ b/typo3/sysext/frontend/Tests/Functional/DataProcessing/RecordTransformationProcessorTest.php
@@ -30,6 +30,10 @@ final class RecordTransformationProcessorTest extends FunctionalTestCase
 {
     use SiteBasedTestTrait;
 
+    protected array $testExtensionsToLoad = [
+        'typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_classic_content',
+    ];
+
     protected const LANGUAGE_PRESETS = [
         'EN' => ['id' => 0, 'title' => 'English', 'locale' => 'en-US'],
     ];