diff --git a/tests/build-ci.xml b/tests/build-ci.xml
index 9f875188391f296726b2366a336760deaab65b0d..27cb0cf5302ca0002069d2492f680446be741eee 100644
--- a/tests/build-ci.xml
+++ b/tests/build-ci.xml
@@ -44,7 +44,7 @@
 
 		<exec executable="phpunit" dir="${basedir}/PHPUnit" failonerror="false" failifexecutionfails="true">
             <!-- DEBUG: when test crash in the middle, enable this to see which test crashes. Note: remove \ from -\- below -->
-            <!--<arg line=" --testdox"/>-->
+            <!--<arg line=" -\-testdox"/>-->
 		</exec>
 
 		<echo>PDO_MYSQL unit tests finished</echo>