diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 00650e4..2cda716 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -16,7 +16,7 @@
     </filter>
     <testsuites>
         <testsuite name="Package Test Suite">
-            <directory suffix=".php">./tests/</directory>
+            <directory suffix="Test.php">./tests/</directory>
         </testsuite>
     </testsuites>
 </phpunit>