diff --git a/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php b/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
index a409150..c3650c0 100644
--- a/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
+++ b/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
@@ -250,6 +250,55 @@ class TranslationTest extends WebTestBase {
   }
 
   /**
+   * Delete a basic page with a translation.
+   */
+  function testMultilanguageContentDelete() {
+    // Add Italian to have three items in the translation set.
+    $this->drupalLogin($this->admin_user);
+    $this->addLanguage('it');
+    $this->resetCaches();
+    $this->drupalLogin($this->translator);
+
+    // Create Basic page in English.
+    $node_title = $this->randomName();
+    $node_body = $this->randomName();
+    $nodes = array('en' => $this->createPage($node_title, $node_body, 'en'));
+
+    // Add Spanish translation.
+    $nodes['es'] = $this->createTranslation($nodes['en'], $this->randomName(), $this->randomName(), 'es');
+    // Reload the English node to get the updated tnid.
+    $nodes['en'] = node_load($nodes['en']->nid, NULL, TRUE);
+
+    // Add Italian translation.
+    // Use Spanish translation as source, rather than the original English one
+    // to check correct tnid handling in createTranslation().
+    $nodes['it'] = $this->createTranslation($nodes['es'], $this->randomName(), $this->randomName(), 'it');
+
+    // Delete the original translation source.
+    node_delete($nodes['en']->nid);
+
+    // Reload the remaining nodes.
+    $nodes['es'] = node_load($nodes['es']->nid, NULL, TRUE);
+    $nodes['it'] = node_load($nodes['it']->nid, NULL, TRUE);
+
+    // The new tnid is selected by the state of {node}.translate.
+    // As the original source node has been deleted, the new tnid could be
+    // generated from either remaining node.
+    $this->assertNotEqual($nodes['es']->tnid, 0, 'ES still in translation set.');
+    $this->assertNotEqual($nodes['it']->tnid, 0, 'IT still in translation set.');
+    $this->assertEqual($nodes['es']->tnid, $nodes['it']->tnid, 'ES and IT still in same translation set.');
+
+    // Delete the spanish node.
+    node_delete($nodes['es']->nid);
+
+    // Reload the italian node. This is the last one.
+    $nodes['it'] = node_load($nodes['it']->nid, NULL, TRUE);
+
+    // The tnid must be zero.
+    $this->assertEqual($nodes['it']->tnid, 0, 'Translation set is terminated.');
+  }
+
+  /**
    * Resets static caches to make the test code match the client-side behavior.
    */
   function resetCaches() {
@@ -298,7 +347,7 @@ class TranslationTest extends WebTestBase {
     }
     else {
       // It's installed. No need to do anything.
-      $this->assertTrue(true, 'Language [' . $language_code . '] already installed.');
+      $this->assertTrue(TRUE, 'Language [' . $language_code . '] already installed.');
     }
   }
 
@@ -364,8 +413,11 @@ class TranslationTest extends WebTestBase {
 
     // Check to make sure that translation was successful.
     $translation = $this->drupalGetNodeByTitle($title);
+    // Maybe the source node was not in translation set,
+    // or it is not the base node of the translation set.
+    $tnid = (empty($node->tnid) ? $node->nid : $node->tnid);
     $this->assertTrue($translation, t('Node found in database.'));
-    $this->assertTrue($translation->tnid == $node->nid, t('Translation set id correctly stored.'));
+    $this->assertTrue($translation->tnid == $tnid, Translation set id correctly stored.);
 
     return $translation;
   }
diff --git a/core/modules/translation/translation.module b/core/modules/translation/translation.module
index 909117f..880d30d 100644
--- a/core/modules/translation/translation.module
+++ b/core/modules/translation/translation.module
@@ -413,8 +413,10 @@ function translation_remove_from_set($node) {
         'tnid' => 0,
         'translate' => 0,
       ));
-    if (db_query('SELECT COUNT(*) FROM {node} WHERE tnid = :tnid', array(':tnid' => $node->tnid))->fetchField() == 1) {
-      // There is only one node left in the set: remove the set altogether.
+    if (db_query('SELECT COUNT(nid) FROM {node} WHERE nid <> :nid AND tnid = :tnid', array(':nid'  => $node->nid, ':tnid' => $node->tnid))->fetchField() == 1) {
+      // Apart from the node being deleted, only one node remains in the set:
+      // remove the set altogether
+
       $query
         ->condition('tnid', $node->tnid)
         ->execute();