diff --git a/modules/simpletest/simpletest.module b/modules/simpletest/simpletest.module
index e734fe1da4e5..e6f422c53ec2 100644
--- a/modules/simpletest/simpletest.module
+++ b/modules/simpletest/simpletest.module
@@ -124,7 +124,6 @@ function _simpletest_format_summary_line($summary) {
  *   drupal being the default.
  */
 function simpletest_run_tests($test_list, $reporter = 'drupal') {
-  cache_clear_all();
   $test_id = db_insert('simpletest_test_id')
     ->useDefaults(array('test_id'))
     ->execute();