diff --git a/core/lib/Drupal/Component/Utility/String.php b/core/lib/Drupal/Component/Utility/String.php
index 60bf969..3a8a2b3 100644
--- a/core/lib/Drupal/Component/Utility/String.php
+++ b/core/lib/Drupal/Component/Utility/String.php
@@ -6,7 +6,6 @@
  */
 
 namespace Drupal\Component\Utility;
-use Drupal\Core\Url;
 
 /**
  * Provides helpers to operate on strings.
diff --git a/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php b/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
index cacf88d..a0a8684 100644
--- a/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
+++ b/core/modules/locale/src/Tests/LocaleConfigTranslationImportTest.php
@@ -36,7 +36,7 @@ protected function setUp() {
 
     // Update module should not go out to d.o to check for updates. We override
     // the url to an invalid update source. No update data will be found.
-    $this->config('update.settings')->set('fetch.url', (string) Url::fromRoute('<front>', array(), array('absolute' => TRUE)))->save();
+    $this->config('update.settings')->set('fetch.url', (string) Url::fromRoute('<front>')->setAbsolute()->toString())->save();
   }
 
   /**
diff --git a/core/modules/node/src/Tests/NodeTranslationUITest.php b/core/modules/node/src/Tests/NodeTranslationUITest.php
index d16d13a..f209811 100644
--- a/core/modules/node/src/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/src/Tests/NodeTranslationUITest.php
@@ -340,7 +340,7 @@ protected function doTestAlternateHreflangLinks(Url $url) {
         // Retrieve desired link elements from the HTML head.
         $links = $this->xpath('head/link[@rel = "alternate" and @href = :href and @hreflang = :hreflang]',
           array(':href' => $language_url->toString(), ':hreflang' => $alternate_langcode));
-        $this->assert(isset($links[0]), format_string('The %langcode node translation has the correct alternate hreflang link for %alternate_langcode: %link.', array('%langcode' => $langcode, '%alternate_langcode' => $alternate_langcode, '%link' => $url)));
+        $this->assert(isset($links[0]), format_string('The %langcode node translation has the correct alternate hreflang link for %alternate_langcode: %link.', array('%langcode' => $langcode, '%alternate_langcode' => $alternate_langcode, '%link' => $url->toString())));
       }
     }
   }