diff --git a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
index f5f3c89..1f09a21 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
@@ -257,6 +257,14 @@ function testFieldTranslatableSettingsUI() {
   }
 
   /**
+   * Tests the translatable settings checkbox for untranslatable entities.
+   */
+  function testNonTranslatableTranslationSettingsUI() {
+    $this->drupalGet('admin/config/regional/content-language');
+    $this->assertNoField('settings[entity_test][entity_test][translatable]');
+  }
+
+  /**
    * Returns the entity manager.
    *
    * @return \Drupal\Core\Entity\EntityManagerInterface