diff --git a/core/modules/language/src/ConfigurableLanguageManager.php b/core/modules/language/src/ConfigurableLanguageManager.php
index b28e02b8b4fa1e94c5c6ebff07c55209fce1ee80..d849691eadf77db40bfe1026380b54dec9e2462c 100644
--- a/core/modules/language/src/ConfigurableLanguageManager.php
+++ b/core/modules/language/src/ConfigurableLanguageManager.php
@@ -319,7 +319,7 @@ public function updateLockedLanguageWeights() {
     // Loop locked languages to maintain the existing order.
     $locked_languages = $this->getLanguages(Language::STATE_LOCKED);
     $config_ids = array_map(function($language) { return 'language.entity.' . $language->id; }, $locked_languages);
-    foreach ($this->configFactory->loadMultiple($config_ids) as $config_id => $config) {
+    foreach ($this->configFactory->loadMultiple($config_ids) as $config) {
       // Update system languages weight.
       $max_weight++;
       $config->set('weight', $max_weight);
diff --git a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php
index bdbedc526cd6cab5f70cceb75d3a6c560f723e12..4819abfd865016913800528fc3856d6aaac610f2 100644
--- a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php
@@ -35,7 +35,6 @@ public function getLangcode(Request $request = NULL) {
     $langcode = NULL;
 
     if ($this->languageManager) {
-      $languages = $this->languageManager->getLanguages();
       $langcode = $this->config->get('language.negotiation')->get('selected_langcode');
     }
 
diff --git a/core/modules/language/src/Tests/LanguageConfigurationTest.php b/core/modules/language/src/Tests/LanguageConfigurationTest.php
index 6093263d6a8d8d753caae51aab17f43f78ad6a9c..15ccc3d9b155916c80d3c6226b219405f6d587d7 100644
--- a/core/modules/language/src/Tests/LanguageConfigurationTest.php
+++ b/core/modules/language/src/Tests/LanguageConfigurationTest.php
@@ -34,7 +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'));
diff --git a/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php b/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
index 9554dd809bd36b8c690a9a04646e3968a4323d50..6b4d098033666f7954d967b0575da17919039300 100644
--- a/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
+++ b/core/modules/language/src/Tests/LanguageCustomLanguageConfigurationTest.php
@@ -34,7 +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'));
diff --git a/core/modules/language/src/Tests/LanguageListTest.php b/core/modules/language/src/Tests/LanguageListTest.php
index d5abded8ea1d0ec090e7f3f22079cdbf1ef7c99e..9a437a5b7ba08eb4fc12f0f51581e0d61f103d74 100644
--- a/core/modules/language/src/Tests/LanguageListTest.php
+++ b/core/modules/language/src/Tests/LanguageListTest.php
@@ -34,7 +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'));
@@ -118,12 +117,9 @@ function testLanguageList() {
     $this->assertResponse(404, 'Language no longer found.');
     // Make sure the "language_count" state has been updated correctly.
     $this->container->get('language_manager')->reset();
-    $languages = $this->container->get('language_manager')->getLanguages();
     // Delete French.
     $this->drupalPostForm('admin/config/regional/language/delete/fr', array(), t('Delete'));
-    // Get the count of languages.
     $this->container->get('language_manager')->reset();
-    $languages = $this->container->get('language_manager')->getLanguages();
     // We need raw here because %language and %langcode will add HTML.
     $t_args = array('%language' => 'French', '%langcode' => 'fr');
     $this->assertRaw(t('The %language (%langcode) language has been removed.', $t_args), 'The French language has been removed.');
diff --git a/core/modules/language/src/Tests/LanguageSwitchingTest.php b/core/modules/language/src/Tests/LanguageSwitchingTest.php
index b4c4616ff79e6749b4af29f074c6e8ec0322e0cd..36607f224074ba6e939c69f2045d04005d3ee2a9 100644
--- a/core/modules/language/src/Tests/LanguageSwitchingTest.php
+++ b/core/modules/language/src/Tests/LanguageSwitchingTest.php
@@ -240,7 +240,6 @@ protected function doTestLanguageLinkActiveClassAuthenticated() {
    */
   protected function doTestLanguageLinkActiveClassAnonymous() {
     $function_name = '#type link';
-    $path = 'language_test/type-link-active-class';
 
     $this->drupalLogout();
 
diff --git a/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php b/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
index 1a2e5d612ea877024b03bd5277c8633f1a0c94af..e828935d8747c23de78fd4b2507973ff2c3e1ca9 100644
--- a/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
+++ b/core/modules/language/src/Tests/LanguageUILanguageNegotiationTest.php
@@ -90,9 +90,6 @@ function testUILanguageNegotiation() {
     // For setting browser language preference to some unknown.
     $http_header_blah = array("Accept-Language: blah;q=1");
 
-    // This domain should switch the UI to Chinese.
-    $language_domain = 'example.cn';
-
     // Setup the site languages by installing two languages.
     // Set the default language in order for the translated string to be registered
     // into database when seen by t(). Without doing this, our target string
diff --git a/core/modules/language/src/Tests/LanguageUrlRewritingTest.php b/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
index 39ad3f813834b05871b62d2e48f3b1de12dbef5d..1079031e533a9d44a01a6356479922244711331a 100644
--- a/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
+++ b/core/modules/language/src/Tests/LanguageUrlRewritingTest.php
@@ -58,7 +58,6 @@ 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');