diff --git a/composer.json b/composer.json
index b0dfa11..ce64513 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,10 @@
     "autoload-dev": {
         "psr-4": {
             "Realodix\\Relax\\Tests\\": "tests"
-        }
+        },
+        "exclude-from-classmap": [
+            "tests/Fixtures/Ruleset/**"
+        ]
     },
     "config": {
         "optimize-autoloader": true,