diff --git a/phpunit.xml b/phpunit.xml
index c5b3bf3..7f1ac1f 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -5,7 +5,7 @@
       <directory>tests</directory>
     </testsuite>
   </testsuites>
-  <source>
+  <source ignoreSuppressionOfPhpWarnings="true">
     <include>
       <directory suffix=".php">src/</directory>
     </include>