Index: modules/simpletest/simpletest.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/simpletest.module,v
retrieving revision 1.56
diff -u -r1.56 simpletest.module
--- modules/simpletest/simpletest.module	5 Jul 2009 18:00:10 -0000	1.56
+++ modules/simpletest/simpletest.module	7 Jul 2009 01:55:16 -0000
@@ -192,6 +192,7 @@
   }
   else {
     drupal_set_message(t('The test run did not successfully finish.'), 'error');
+    drupal_set_message(t('Please use the <em>Clean environment</em> button to clean-up temporary files and tables.'), 'warning');
   }
   module_invoke_all('test_group_finished');
 }