diff --git a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
index aa5f233790a0ce45f996b487a7baab14c295dec3..12c6f11f803cf1b4fa2933cc669bfad572e9ec83 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
@@ -454,7 +454,8 @@ protected function error($message = '', $group = 'Other', array $caller = NULL)
    */
   protected function verbose($message) {
     if ($id = simpletest_verbose($message)) {
-      $url = file_create_url($this->originalFileDirectory . '/simpletest/verbose/' . get_class($this) . '-' . $id . '.html');
+      $class = str_replace('\\', '_', get_class($this));
+      $url = file_create_url($this->originalFileDirectory . '/simpletest/verbose/' . $class . '-' . $id . '.html');
       $this->error(l(t('Verbose message'), $url, array('attributes' => array('target' => '_blank'))), 'User notice');
     }
   }
@@ -473,7 +474,8 @@ protected function verbose($message) {
    */
   public function run(array $methods = array()) {
     // Initialize verbose debugging.
-    simpletest_verbose(NULL, variable_get('file_public_path', conf_path() . '/files'), get_class($this));
+    $class = get_class($this);
+    simpletest_verbose(NULL, variable_get('file_public_path', conf_path() . '/files'), str_replace('\\', '_', $class));
 
     // HTTP auth settings (<username>:<password>) for the simpletest browser
     // when sending requests to the test site.
@@ -485,7 +487,6 @@ public function run(array $methods = array()) {
     }
 
     set_error_handler(array($this, 'errorHandler'));
-    $class = get_class($this);
     // Iterate through all the methods in this class, unless a specific list of
     // methods to run was passed.
     $class_methods = get_class_methods($class);