diff --git a/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php b/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php
index f20f3a503be99ede6eb78293f4774c4820b1c38d..b31833a728b3202df81697f0cca2ecd809b2c6ff 100644
--- a/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php
+++ b/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php
@@ -142,6 +142,13 @@ public function isComputed() {
     return $this->getBaseFieldDefinition()->isComputed();
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getClass() {
+    return $this->getBaseFieldDefinition()->getClass();
+  }
+
   /**
    * Gets the base field definition.
    *
diff --git a/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php b/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
index db80eea1a607773b76f1791dd94f3324e7a1ee30..e52bf961374400651b000612e82a0348a96eab80 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ContentModerationStateTest.php
@@ -398,6 +398,37 @@ public function testMultilingualModeration() {
     $this->assertEquals(6, $english_node->getRevisionId());
   }
 
+  /**
+   * Tests moderation when the moderation_state field has a config override.
+   */
+  public function testModerationWithFieldConfigOverride() {
+    NodeType::create([
+      'type' => 'test_type',
+    ])->save();
+
+    $workflow = Workflow::load('editorial');
+    $workflow->getTypePlugin()->addEntityTypeAndBundle('node', 'test_type');
+    $workflow->save();
+
+    $fields = $this->container->get('entity_field.manager')->getFieldDefinitions('node', 'test_type');
+    $field_config = $fields['moderation_state']->getConfig('test_type');
+    $field_config->setLabel('Field Override!');
+    $field_config->save();
+
+    $node = Node::create([
+      'title' => 'Test node',
+      'type' => 'test_type',
+    ]);
+    $node->save();
+    $this->assertFalse($node->isPublished());
+    $this->assertEquals('draft', $node->moderation_state->value);
+
+    $node->moderation_state = 'published';
+    $node->save();
+    $this->assertTrue($node->isPublished());
+    $this->assertEquals('published', $node->moderation_state->value);
+  }
+
   /**
    * Tests that entities with special languages can be moderated.
    */
diff --git a/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php b/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..404c2f0b6b2b3e617fc83dff0668b19568b3d713
--- /dev/null
+++ b/core/tests/Drupal/KernelTests/Core/Field/Entity/BaseFieldOverrideTest.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Drupal\KernelTests\Core\Field\Entity;
+
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\Field\Entity\BaseFieldOverride;
+use Drupal\Core\Field\FieldItemList;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Field\Entity\BaseFieldOverride
+ * @group Field
+ */
+class BaseFieldOverrideTest extends KernelTestBase {
+
+  /**
+   * Modules to install.
+   *
+   * @var array
+   */
+  public static $modules = ['system'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->installEntitySchema('base_field_override');
+  }
+
+  /**
+   * @covers ::getClass
+   *
+   * @dataProvider getClassTestCases
+   */
+  public function testGetClass($field_type, $base_field_class, $expected_override_class) {
+    $base_field = BaseFieldDefinition::create($field_type)
+      ->setName('Test Field')
+      ->setTargetEntityTypeId('entity_test');
+    if ($base_field_class) {
+      $base_field->setClass($base_field_class);
+    }
+    $override = BaseFieldOverride::createFromBaseFieldDefinition($base_field, 'test_bundle');
+    $this->assertEquals($expected_override_class, ltrim($override->getClass(), '\\'));
+  }
+
+  /**
+   * Test cases for ::testGetClass.
+   */
+  public function getClassTestCases() {
+    return [
+      'String (default class)' => [
+        'string',
+        FALSE,
+        FieldItemList::class,
+      ],
+      'String (overriden class)' => [
+        'string',
+        static::class,
+        static::class,
+      ],
+    ];
+  }
+
+}