diff --git a/core/modules/language/language.negotiation.inc b/core/modules/language/language.negotiation.inc
index dc69597..c847678 100644
--- a/core/modules/language/language.negotiation.inc
+++ b/core/modules/language/language.negotiation.inc
@@ -135,7 +135,6 @@ function language_from_browser($languages) {
     // first occurence of '-' otherwise we get a non-existing language zh.
     // All other languages use a langcode without a '-', so we can safely split
     // on the first occurence of it.
-    $generic_tag = '';
     if (strlen($langcode) > 7 && (substr($langcode, 0, 7) == 'zh-hant' || substr($langcode, 0, 7) == 'zh-hans')) {
       $generic_tag = substr($langcode, 0, 7);
     }
@@ -293,7 +292,7 @@ function language_from_url($languages, Request $request = NULL) {
     case LANGUAGE_NEGOTIATION_URL_PREFIX:
 
       $request_path = urldecode(trim($request->getPathInfo(), '/'));
-      list($language, $path) = language_url_split_prefix($request_path, $languages);
+      list($language, ) = language_url_split_prefix($request_path, $languages);
 
       if ($language !== FALSE) {
         $language_url = $language->id;
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
index f970bdd..8aa5506 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
@@ -34,8 +34,6 @@ public static function getInfo() {
    * Functional tests for adding, editing and deleting languages.
    */
   function testLanguageConfiguration() {
-    global $base_url;
-
     // User to add and remove language.
     $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'administer site configuration'));
     $this->drupalLogin($admin_user);
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
index ff8086b..0196b19 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
@@ -34,8 +34,6 @@ public static function getInfo() {
    * Functional tests for adding, editing and deleting languages.
    */
   public function testLanguageConfiguration() {
-    global $base_url;
-
     // Create user with permissions to add and remove languages.
     $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages'));
     $this->drupalLogin($admin_user);
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php
index 4870f57..43049e8 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php
@@ -34,8 +34,6 @@ public static function getInfo() {
    * Functional tests for adding, editing and deleting languages.
    */
   function testLanguageList() {
-    global $base_url;
-
     // User to add and remove language.
     $admin_user = $this->drupalCreateUser(array('administer languages', 'access administration pages', 'administer site configuration'));
     $this->drupalLogin($admin_user);
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageUrlRewritingTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageUrlRewritingTest.php
index 5266fd1..7a1418d 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageUrlRewritingTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageUrlRewritingTest.php
@@ -59,7 +59,6 @@ function testUrlRewritingEdgeCases() {
     $non_existing->id = $this->randomName();
     $this->checkUrl($non_existing, 'Path language is ignored if language is not installed.', 'URL language negotiation does not work with non-installed languages');
 
-    $request = $this->prepareRequestForGenerator();
     // Check that URL rewriting is not applied to subrequests.
     $this->drupalGet('language_test/subrequest');
     $this->assertText($this->web_user->getUsername(), 'Page correctly retrieved');