Index: modules/simpletest/simpletest.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/simpletest.module,v
retrieving revision 1.1
diff -u -p -r1.1 simpletest.module
--- modules/simpletest/simpletest.module	20 Apr 2008 18:23:29 -0000	1.1
+++ modules/simpletest/simpletest.module	8 May 2008 16:54:20 -0000
@@ -116,7 +116,7 @@ function simpletest_overview_form() {
   foreach ($test_instances as $group_test) {
     $group = array();
     $tests = $group_test->getTestInstances();
-    $group_class = str_replace(' ', '-', strtolower($group_test->getLabel()));
+    $group_class = str_replace(' ', '-', strtolower($group_test->getLabel())) . '-tests';
     $group['tests'] = array(
       '#type' => 'fieldset',
       '#collapsible' => TRUE,