diff --git a/ps_emailsubscription.php b/ps_emailsubscription.php
index 375734e..2b92863 100644
--- a/ps_emailsubscription.php
+++ b/ps_emailsubscription.php
@@ -952,21 +952,6 @@ public function hookActionFrontControllerSetMedia()
         $controller->registerJavascript('modules-psemailsubscription', 'modules/' . $this->name . '/views/js/ps_emailsubscription.js');
     }
 
-    /**
-     * Returns the admin controller with a concrete type. Context::$controller is typed
-     * as the PHPStan-opaque LegacyControllerContext on PrestaShop 9.x, which prevents
-     * static resolution of legacy controller methods such as getLanguages().
-     *
-     * @return AdminController
-     */
-    private function getAdminController()
-    {
-        /** @var AdminController $controller */
-        $controller = $this->context->controller;
-
-        return $controller;
-    }
-
     /**
      * Deletes duplicates email in newsletter table.
      *
@@ -1153,7 +1138,7 @@ public function renderForm()
         $helper->token = Tools::getAdminTokenLite('AdminModules');
         $helper->tpl_vars = [
             'fields_value' => $this->getConfigFieldsValues(),
-            'languages' => $this->getAdminController()->getLanguages(),
+            'languages' => $this->context->controller->getLanguages(),
             'id_language' => $this->context->language->id,
         ];
 
@@ -1254,7 +1239,7 @@ public function renderExportForm()
         $helper->token = Tools::getAdminTokenLite('AdminModules');
         $helper->tpl_vars = [
             'fields_value' => $this->getConfigFieldsValues(),
-            'languages' => $this->getAdminController()->getLanguages(),
+            'languages' => $this->context->controller->getLanguages(),
             'id_language' => $this->context->language->id,
         ];
 
@@ -1293,7 +1278,7 @@ public function renderSearchForm()
         $helper->token = Tools::getAdminTokenLite('AdminModules');
         $helper->tpl_vars = [
             'fields_value' => ['searched_email' => $this->_searched_email],
-            'languages' => $this->getAdminController()->getLanguages(),
+            'languages' => $this->context->controller->getLanguages(),
             'id_language' => $this->context->language->id,
         ];
 
diff --git a/tests/php/phpstan/phpstan-9.0.3.neon b/tests/php/phpstan/phpstan-9.0.3.neon
index efa856c..a976397 100644
--- a/tests/php/phpstan/phpstan-9.0.3.neon
+++ b/tests/php/phpstan/phpstan-9.0.3.neon
@@ -1,2 +1,8 @@
 includes:
 	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  # PrestaShop 9 requires PHP 8.1 as a minimum. It has to be set explicitly because PHPStan
+  # otherwise infers the analysed PHP version from the composer platform declaration, and the
+  # resulting older syntax rules make it fail to parse the core classes the module relies on.
+  phpVersion: 80100
diff --git a/tests/php/phpstan/phpstan-9.1.5.neon b/tests/php/phpstan/phpstan-9.1.5.neon
index efa856c..a976397 100644
--- a/tests/php/phpstan/phpstan-9.1.5.neon
+++ b/tests/php/phpstan/phpstan-9.1.5.neon
@@ -1,2 +1,8 @@
 includes:
 	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  # PrestaShop 9 requires PHP 8.1 as a minimum. It has to be set explicitly because PHPStan
+  # otherwise infers the analysed PHP version from the composer platform declaration, and the
+  # resulting older syntax rules make it fail to parse the core classes the module relies on.
+  phpVersion: 80100
diff --git a/tests/php/phpstan/phpstan-9.2.x.neon b/tests/php/phpstan/phpstan-9.2.x.neon
index efa856c..a976397 100644
--- a/tests/php/phpstan/phpstan-9.2.x.neon
+++ b/tests/php/phpstan/phpstan-9.2.x.neon
@@ -1,2 +1,8 @@
 includes:
 	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  # PrestaShop 9 requires PHP 8.1 as a minimum. It has to be set explicitly because PHPStan
+  # otherwise infers the analysed PHP version from the composer platform declaration, and the
+  # resulting older syntax rules make it fail to parse the core classes the module relies on.
+  phpVersion: 80100
diff --git a/tests/php/phpstan/phpstan-develop.neon b/tests/php/phpstan/phpstan-develop.neon
index efa856c..a976397 100644
--- a/tests/php/phpstan/phpstan-develop.neon
+++ b/tests/php/phpstan/phpstan-develop.neon
@@ -1,2 +1,8 @@
 includes:
 	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  # PrestaShop 9 requires PHP 8.1 as a minimum. It has to be set explicitly because PHPStan
+  # otherwise infers the analysed PHP version from the composer platform declaration, and the
+  # resulting older syntax rules make it fail to parse the core classes the module relies on.
+  phpVersion: 80100