diff --git a/core/modules/ckeditor/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php b/core/modules/ckeditor/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php
index 6e3ba9a4f59..9e7b8df53a6 100644
--- a/core/modules/ckeditor/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php
+++ b/core/modules/ckeditor/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php
@@ -24,6 +24,13 @@ class CKEditorIntegrationTest extends WebDriverTestBase {
    */
   protected $account;
 
+  /**
+   * The FilterFormat config entity used for testing.
+   *
+   * @var \Drupal\filter\FilterFormatInterface
+   */
+  protected $filterFormat;
+
   /**
    * {@inheritdoc}
    */
@@ -36,12 +43,12 @@ class CKEditorIntegrationTest extends WebDriverTestBase {
     parent::setUp();
 
     // Create a text format and associate CKEditor.
-    $filtered_html_format = FilterFormat::create([
+    $this->filterFormat = FilterFormat::create([
       'format' => 'filtered_html',
       'name' => 'Filtered HTML',
       'weight' => 0,
     ]);
-    $filtered_html_format->save();
+    $this->filterFormat->save();
 
     Editor::create([
       'format' => 'filtered_html',
@@ -139,4 +146,35 @@ class CKEditorIntegrationTest extends WebDriverTestBase {
     $web_assert->elementContains('css', '.ui-dialog .ui-dialog-titlebar', 'Insert Image');
   }
 
+  /**
+   * Tests if the Drupal Image Caption plugin appears and works as expected.
+   */
+  public function testDrupalImageCaptionDialog() {
+    $web_assert = $this->assertSession();
+
+    // Disable the caption filter.
+    $this->filterFormat->setFilterConfig('filter_caption', [
+      'status' => FALSE,
+    ]);
+    $this->filterFormat->save();
+
+    // If the caption filter is disabled, its checkbox should be absent.
+    $this->drupalGet('node/add/page');
+    $this->click('.cke_button__drupalimage');
+    $this->assertNotEmpty($web_assert->waitForElement('css', '.ui-dialog'));
+    $web_assert->elementNotExists('css', '.ui-dialog input[name="attributes[hasCaption]"]');
+
+    // Enable the caption filter again.
+    $this->filterFormat->setFilterConfig('filter_caption', [
+      'status' => TRUE,
+    ]);
+    $this->filterFormat->save();
+
+    // If the caption filter is enabled,  its checkbox should be present.
+    $this->drupalGet('node/add/page');
+    $this->click('.cke_button__drupalimage');
+    $this->assertNotEmpty($web_assert->waitForElement('css', '.ui-dialog'));
+    $web_assert->elementExists('css', '.ui-dialog input[name="attributes[hasCaption]"]');
+  }
+
 }