diff --git modules/simpletest/tests/bootstrap.test modules/simpletest/tests/bootstrap.test
index 333f34b..c7774aa 100644
--- modules/simpletest/tests/bootstrap.test
+++ modules/simpletest/tests/bootstrap.test
@@ -324,7 +324,7 @@ class HookBootExitTestCase extends DrupalWebTestCase {
 /**
  * Test drupal_get_filename()'s availability.
  */
-class BootstrapGetFilenameTestCase extends DrupalUnitTestCase {
+class BootstrapGetFilenameTestCase extends DrupalWebTestCase {
 
   public static function getInfo() {
     return array(
@@ -497,4 +497,3 @@ class BootstrapOverrideServerVariablesTestCase extends DrupalUnitTestCase {
     }
   }
 }
-