diff --git a/core/modules/node/src/Tests/NodeTranslationUITest.php b/core/modules/node/src/Tests/NodeTranslationUITest.php
index 86010b8..f1ae933 100644
--- a/core/modules/node/src/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/src/Tests/NodeTranslationUITest.php
@@ -339,7 +339,7 @@ protected function doTestAlternateHreflangLinks(Url $url_info) {
       $urls[$langcode] = $url_info->setAbsolute()->setOption('language', $languages[$langcode])->toString();
     }
     foreach ($this->langcodes as $langcode) {
-      $this->drupalGet($url->toString(), array('language' => $languages[$langcode]));
+      $this->drupalGet($url_info->toString(), array('language' => $languages[$langcode]));
       foreach ($urls as $alternate_langcode => $url) {
         // Retrieve desired link elements from the HTML head.
         $links = $this->xpath('head/link[@rel = "alternate" and @href = :href and @hreflang = :hreflang]',
diff --git a/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php b/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
index aa41c0b..c890127 100644
--- a/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
+++ b/core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php
@@ -77,7 +77,7 @@ public function testInternalBrowser() {
     // @see drupal_valid_test_ua()
     // Not using File API; a potential error must trigger a PHP warning.
     unlink($this->siteDirectory . '/.htkey');
-    $this->drupalGet(Url::fromUri('base://core/install.php', array('external' => TRUE, 'absolute' => TRUE))->toString);
+    $this->drupalGet(Url::fromUri('base://core/install.php', array('external' => TRUE, 'absolute' => TRUE))->toString());
     $this->assertResponse(403, 'Cannot access install.php.');
   }
 
diff --git a/core/modules/views/src/Tests/GlossaryTest.php b/core/modules/views/src/Tests/GlossaryTest.php
index 448101c..3036ff0 100644
--- a/core/modules/views/src/Tests/GlossaryTest.php
+++ b/core/modules/views/src/Tests/GlossaryTest.php
@@ -67,7 +67,7 @@ public function testGlossaryView() {
     $this->assertResponse(200);
 
     foreach ($nodes_per_char as $char => $count) {
-      $href = Url::fromRoute('views.glossary.page_1', ['arg_0' => $char]);
+      $href = Url::fromRoute('views.glossary.page_1', ['arg_0' => $char])->toString();
       $label = Unicode::strtoupper($char);
       // Get the summary link for a certain character. Filter by label and href
       // to ensure that both of them are correct.