diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index b8c7c46..4b372df 100755
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -23,7 +23,7 @@
   </coverage>
   <testsuites>
     <testsuite name="unit">
-      <directory>unit</directory>
+      <directory>Unit</directory>
     </testsuite>
   </testsuites>
 </phpunit>