diff --git a/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php b/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
index cab26ee60a8..a4091505bce 100644
--- a/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
+++ b/core/modules/translation/lib/Drupal/translation/Tests/TranslationTest.php
@@ -249,55 +249,6 @@ class TranslationTest extends WebTestBase {
     $this->assertLanguageSwitchLinks($node, $node_it, TRUE, $type);
   }
 
-  /**
-   * 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.
    */
@@ -347,7 +298,7 @@ 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.');
     }
   }
 
@@ -413,11 +364,8 @@ 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 == $tnid, 'Translation set id correctly stored.');
+    $this->assertTrue($translation->tnid == $node->nid, t('Translation set id correctly stored.'));
 
     return $translation;
   }
diff --git a/core/modules/translation/translation.module b/core/modules/translation/translation.module
index 880d30d34e9..909117f1240 100644
--- a/core/modules/translation/translation.module
+++ b/core/modules/translation/translation.module
@@ -413,10 +413,8 @@ function translation_remove_from_set($node) {
         'tnid' => 0,
         'translate' => 0,
       ));
-    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
-
+    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.
       $query
         ->condition('tnid', $node->tnid)
         ->execute();