diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
index 0816fce..854db9b 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
@@ -36,6 +36,7 @@
   function testTranslationUI() {
     $this->doTestBasicTranslation();
     $this->doTestTranslationOverview();
+    $this->doTestSourceLanguageColumn();
     $this->doTestOutdatedStatus();
     $this->doTestPublishedStatus();
     $this->doTestAuthoringInfo();
@@ -116,6 +117,56 @@ protected function doTestTranslationOverview() {
   }
 
   /**
+   * Tests that the "Source language" column is shown only when needed.
+   *
+   * The "Source language" column should only be shown when an entity has
+   * translations that derive from at least two source languages.
+   */
+  protected function doTestSourceLanguageColumn() {
+    // Create a new test entity with original values in the default language.
+    $default_langcode = $this->langcodes[0];
+    $values[$default_langcode] = $this->getNewEntityValues($default_langcode);
+    $entityId = $this->createEntity($values[$default_langcode], $default_langcode);
+    $entity = entity_load($this->entityTypeId, $entityId, TRUE);
+    $this->assertTrue($entity, 'Entity found in the database.');
+    $this->drupalGet($entity->getSystemPath());
+    $this->assertResponse(200, 'Entity URL is valid.');
+
+    // If all content is written from scratch in various languages then source
+    // language column should be hidden.
+    $this->drupalGet($entity->getSystemPath('drupal:content-translation-overview'));
+    $this->assertNoText('Source language', format_string('Source language column correctly hidden.'));
+
+    // Create a number of content translations from scratch, so not based on a
+    // currently existing entity in a different source language.
+    $langcode = 'fr';
+    $values[$langcode] = $this->getNewEntityValues($langcode);
+    $content_translation_path = $entity->getSystemPath('drupal:content-translation-overview');
+    $path = $langcode . '/' . $content_translation_path . '/add/' . $default_langcode . '/' . $langcode;
+    $this->drupalPostForm($path, $this->getEditValues($values, $langcode), $this->getFormSubmitAction($entity));
+    $entity = entity_load($this->entityTypeId, $entityId, TRUE);
+
+    // If at most one translated version of an entity is derived from a version
+    // of it in another language, then Source language column should be hidden.
+    $this->drupalGet($entity->getSystemPath('drupal:content-translation-overview'));
+    $this->assertNoText('Source language', format_string('Source language column correctly hidden.'));
+
+    // Create a new translation based on another source language.
+    $langcode = 'it';
+    $values[$langcode] = $this->getNewEntityValues($langcode);
+    $source_langcode = 'fr';
+    $path = $langcode . '/' . $content_translation_path . '/add/' . $source_langcode . '/' . $langcode;
+    $this->drupalPostForm($path, $this->getEditValues($values, $langcode), $this->getFormSubmitAction($entity));
+    $entity = entity_load($this->entityTypeId, $entityId, TRUE);
+
+    // If two or more translated versions of an entity are derived from any
+    // version of it in another language, then Source language column should be
+    // shown.
+    $this->drupalGet($entity->getSystemPath('drupal:content-translation-overview'));
+    $this->assertText('Source language', format_string('Source language column correctly shown.'));
+  }
+
+  /**
    * Tests up-to-date status tracking.
    */
   protected function doTestOutdatedStatus() {