diff --git a/composer.json b/composer.json
index e744b40e..1385ee98 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,10 @@
         "symfony/css-selector": ""
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\DomCrawler\\": "" }
+        "psr-4": { "Symfony\\Component\\DomCrawler\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {