diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 42bd323f5..496304d8d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: ["7.3", "7.4", "8.0", "8.1", "8.2"]
+                php: ["7.3", "7.4", "8.0", "8.1", "8.2", "8.3"]
                 operating-system: [ ubuntu-latest, macOS-latest, windows-latest ]
                 composer-flags: [""]
                 composer-extras: [""]
@@ -29,7 +29,7 @@ jobs:
                     -   php: "8.0"
                         operating-system: windows-latest
                     -   php: "8.2"
-                        stability: "dev"
+                    -   php: "8.3"
 
         env:
             COMPOSER_ROOT_VERSION: dev-master
diff --git a/composer.json b/composer.json
index e2363c5aa..52b2a19bf 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     ],
 
     "require": {
-        "php":                      "^7.3 || 8.0.* || 8.1.* || 8.2.*",
+        "php":                      "^7.3 || 8.0.* || 8.1.* || 8.2.* || 8.3.*",
         "phpspec/prophecy":         "^1.9",
         "phpspec/php-diff":         "^1.0.0",
         "sebastian/exporter":       "^3.0 || ^4.0 || ^5.0",
diff --git a/features/configuration/developer_adds_extensions.feature b/features/configuration/developer_adds_extensions.feature
index eebc86c16..819589579 100644
--- a/features/configuration/developer_adds_extensions.feature
+++ b/features/configuration/developer_adds_extensions.feature
@@ -14,7 +14,7 @@ Feature: Developer enables extensions
       {
           public function load(\PhpSpec\ServiceContainer $container, array $params)
           {
-              throw new \Exception(get_class().' enabled'. print_r($params, true));
+              throw new \Exception(get_class($this).' enabled'. print_r($params, true));
           }
       }
 
@@ -40,7 +40,7 @@ Feature: Developer enables extensions
       {
           public function load(\PhpSpec\ServiceContainer $container, array $params)
           {
-              throw new \Exception(get_class().' enabled'. print_r($params, true));
+              throw new \Exception(get_class($this).' enabled'. print_r($params, true));
           }
       }
 
@@ -64,7 +64,7 @@ Feature: Developer enables extensions
       {
           public function load(\PhpSpec\ServiceContainer $container, array $params)
           {
-              throw new \Exception(get_class().' enabled'. print_r($params, true));
+              throw new \Exception(get_class($this).' enabled'. print_r($params, true));
           }
       }
 
@@ -88,7 +88,7 @@ Feature: Developer enables extensions
       {
           public function load(\PhpSpec\ServiceContainer $container, array $params)
           {
-              throw new \Exception(get_class().' enabled'. print_r($params, true));
+              throw new \Exception(get_class($this).' enabled'. print_r($params, true));
           }
       }