diff --git a/composer.json b/composer.json
index d320b0b4d..d632c8991 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,10 @@
         "psr-4": { "Doctrine\\ORM\\": "lib/Doctrine/ORM" }
     },
     "autoload-dev": {
-        "psr-4": { "Doctrine\\Tests\\": "tests/Doctrine/Tests" }
+        "psr-4": {
+            "Doctrine\\Tests\\": "tests/Doctrine/Tests",
+            "Doctrine\\Performance\\": "tests/Doctrine/Performance"
+        }
     },
     "bin": ["bin/doctrine"],
     "extra": {