diff --git a/core/tests/Drupal/Tests/Component/Utility/UrlTest.php b/core/tests/Drupal/Tests/Component/Utility/UrlTest.php
index de62324..20fd9d9 100644
--- a/core/tests/Drupal/Tests/Component/Utility/UrlTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/UrlTest.php
@@ -315,6 +315,29 @@ public static function providerTestIsExternal() {
   }
 
   /**
+   * Tests if external path matches local path.
+   *
+   * @see \Drupal\Component\Utility\Url::externalIsLocal()
+   *
+   * @dataProvider providerTestExternalIsLocal
+   */
+  public function testExternalIsLocal($url, $base_url, $expected) {
+    $isLocal = Url::externalIsLocal($url, $base_url);
+    $this->assertEquals($expected, $isLocal);
+  }
+
+  /**
+   * Provides data for self::testExternalIsLocal().
+   */
+  public static function providerTestExternalIsLocal() {
+    return array(
+      array('http://example.com/internal/path', 'http://example.com/', TRUE),
+      array('http://example.org/external/path', 'http://example.com/', FALSE),
+      array('http://example.org', 'http://example.com/', FALSE),
+    );
+  }
+
+  /**
    * Tests bad protocol filtering and escaping.
    *
    * @dataProvider providerTestFilterBadProtocol