diff --git a/tests/PHPUnit/Fixture.php b/tests/PHPUnit/Fixture.php
index 68666d29eead8afd5763fed00162867331b13c6f..17b95acb43bcdf9c273511358e15a93ab2b8aec4 100644
--- a/tests/PHPUnit/Fixture.php
+++ b/tests/PHPUnit/Fixture.php
@@ -215,6 +215,8 @@ class Fixture extends PHPUnit_Framework_Assert
 
     public function performTearDown()
     {
+        // Note: avoid run SQL in the *tearDown() metohds because it randomly fails on Travis CI
+        // with error Error while sending QUERY packet. PID=XX
         $this->tearDown();
 
         self::unloadAllPlugins();