diff --git a/modules/openapi-generator/src/main/resources/php/model_generic.mustache b/modules/openapi-generator/src/main/resources/php/model_generic.mustache
index 276b2bd9d8c..64bb657af16 100644
--- a/modules/openapi-generator/src/main/resources/php/model_generic.mustache
+++ b/modules/openapi-generator/src/main/resources/php/model_generic.mustache
@@ -188,12 +188,12 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}}{{/parentSchema}}{{^par
      */
     public function listInvalidProperties()
     {
-        {{#parent}}
+        {{#parentSchema}}
         $invalidProperties = parent::listInvalidProperties();
-        {{/parent}}
-        {{^parent}}
+        {{/parentSchema}}
+        {{^parentSchema}}
         $invalidProperties = [];
-        {{/parent}}
+        {{/parentSchema}}
 
         {{#vars}}
         {{#required}}
diff --git a/samples/client/petstore/php/OpenAPIClient-php/lib/Model/NullableClass.php b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/NullableClass.php
index 353f25b955c..95cfccff0f3 100644
--- a/samples/client/petstore/php/OpenAPIClient-php/lib/Model/NullableClass.php
+++ b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/NullableClass.php
@@ -254,7 +254,7 @@ class NullableClass implements ModelInterface, ArrayAccess, \JsonSerializable
      */
     public function listInvalidProperties()
     {
-        $invalidProperties = parent::listInvalidProperties();
+        $invalidProperties = [];
 
         return $invalidProperties;
     }