diff --git a/composer.json b/composer.json
index 1c8d5684..f7e763d2 100644
--- a/composer.json
+++ b/composer.json
@@ -27,12 +27,12 @@
         "php": ">=5.3",
         "php-flasher/flasher": "dev-main"
     },
-    "require-dev": {
-        "phpunit/phpunit": "^4.8|^5.7|^6.0|^7.0|^8.3|^9.0"
-    },
     "autoload": {
         "psr-4": {
-            "Flasher\\Toastr\\": ""
+            "Flasher\\Toastr\\Prime\\": "",
+            "exclude-from-classmap": [
+                "/Tests/"
+            ]
         }
     },
     "autoload-dev": {