diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index fe20f2caa..0bf7ddfae 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -36,6 +36,7 @@
         </include>
         <exclude>
             <file>./src/Composer/Autoload/ClassLoader.php</file>
+            <directory>./src/Composer/PHPStan/</directory>
         </exclude>
     </coverage>
 </phpunit>
diff --git a/tests/complete.phpunit.xml b/tests/complete.phpunit.xml
index b30398e96..e5e4fe0f1 100644
--- a/tests/complete.phpunit.xml
+++ b/tests/complete.phpunit.xml
@@ -35,6 +35,7 @@
         </include>
         <exclude>
             <file>../src/Composer/Autoload/ClassLoader.php</file>
+            <directory>../src/Composer/PHPStan/</directory>
         </exclude>
     </coverage>
 </phpunit>