diff --git a/modules/locale/locale.test b/modules/locale/locale.test
index 9086587..fbbcab1 100644
--- a/modules/locale/locale.test
+++ b/modules/locale/locale.test
@@ -2629,6 +2629,68 @@ private function checkUrl($language, $message1, $message2) {
     $this->drupalGet("$prefix/$path");
     $this->assertResponse(404, $message2);
   }
+
+  /**
+   * Check URL rewriting when using a domain name and a non-standard port.
+   */
+  function testDomainNameNegotiationPort() {
+    $language_domain = 'example.fr';
+    $edit = array(
+      'locale_language_negotiation_url_part' => 1,
+    );
+    $this->drupalPost('admin/config/regional/language/configure/url', $edit, t('Save configuration'));
+    $edit = array(
+      'prefix' => '',
+      'domain' => $language_domain
+    );
+    $this->drupalPost('admin/config/regional/language/edit/fr', $edit, t('Save language'));
+
+    // Enable domain configuration.
+    variable_set('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN);
+
+    // Reset static caching.
+    drupal_static_reset('language_list');
+    drupal_static_reset('language_url_outbound_alter');
+    drupal_static_reset('language_url_rewrite_url');
+
+    // In case index.php is part of the URLs, we need to adapt the asserted
+    // URLs as well.
+    $index_php = strpos(url('', array('absolute' => TRUE)), 'index.php') !== FALSE;
+
+    // Remember current HTTP_HOST.
+    $http_host = $_SERVER['HTTP_HOST'];
+
+    // Fake a different port.
+    $_SERVER['HTTP_HOST'] .= ':88';
+
+    // Create an absolute French link.
+    $languages = language_list();
+    $language = $languages['fr'];
+    $url = url('', array(
+      'absolute' => TRUE,
+      'language' => $language
+    ));
+
+    $expected = 'http://example.fr:88/';
+    $expected .= $index_php ? 'index.php/' : '';
+
+    $this->assertEqual($url, $expected, 'The right port is used.');
+
+    // If we set the port explicitly in url(), it should not be overriden.
+    $url = url('', array(
+      'absolute' => TRUE,
+      'language' => $language,
+      'base_url' => $GLOBALS['base_url'] . ':90',
+    ));
+
+    $expected = 'http://example.fr:90/';
+    $expected .= $index_php ? 'index.php/' : '';
+
+    $this->assertEqual($url, $expected, 'A given port is not overriden.');
+
+    // Restore HTTP_HOST.
+    $_SERVER['HTTP_HOST'] = $http_host;
+  }
 }
 
 /**