diff --git a/core/modules/system/lib/Drupal/system/Tests/Database/DeleteTruncateTest.php b/core/modules/system/lib/Drupal/system/Tests/Database/DeleteTruncateTest.php
old mode 100644
new mode 100755
index 3d72da19b6d84cf2aca41b3df85f53d1b1159ca7..6f98e7c0d46aa63973ea3f4f396babec4d3ab075
--- a/core/modules/system/lib/Drupal/system/Tests/Database/DeleteTruncateTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Database/DeleteTruncateTest.php
@@ -69,6 +69,7 @@ function testSimpleDelete() {
    */
   function testTruncate() {
     $num_records_before = db_query("SELECT COUNT(*) FROM {test}")->fetchField();
+    $this->assertTrue($num_records_before > 0, 'The table is not empty.');
 
     db_truncate('test')->execute();