diff --git a/composer.json b/composer.json
index d46d6a9..77382a8 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,10 @@
     "autoload": {
         "psr-4": {
             "RayanLevert\\Dotenv\\": "src/"
-        }
+        },
+        "exclude-from-classmap": [
+            "tests/"
+        ]
     },
     "autoload-dev": {
         "psr-4": {