diff --git a/src/opnsense/mvc/app/config/AppConfig.php b/src/opnsense/mvc/app/config/AppConfig.php
index c56699d54..fc3e4a7f7 100644
--- a/src/opnsense/mvc/app/config/AppConfig.php
+++ b/src/opnsense/mvc/app/config/AppConfig.php
@@ -73,4 +73,25 @@ class AppConfig
         // simple conversion from array to StdClass container, current representation of self::$data.
         self::$obj = json_decode(json_encode(self::$data));
     }
+
+    /**
+     * update a property inside the container
+     * @param string $path in dot notation a.b.c
+     * @param mixed $value
+     * @return bool true when found and updated
+     */
+    public function update($path, $value)
+    {
+        $tmp = &self::$data;
+        foreach (explode('.', $path) as $key) {
+            if (isset($tmp[$key])) {
+                $tmp = &$tmp[$key];
+            } else {
+                return false;
+            }
+        }
+        $tmp = $value;
+        self::$obj = json_decode(json_encode(self::$data));
+        return true;
+    }
 }
\ No newline at end of file
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthGroupFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthGroupFieldTest.php
index 255e68c7d..993ee1677 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthGroupFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthGroupFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\AuthGroupField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class AuthGroupFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class AuthGroupFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\AuthGroupField', new AuthGroupField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/AuthGroupFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/AuthGroupFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthenticationServerFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthenticationServerFieldTest.php
index e54b89904..581f4e20d 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthenticationServerFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/AuthenticationServerFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\AuthenticationServerField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class AuthenticationServerFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class AuthenticationServerFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\AuthenticationServerField', new AuthenticationServerField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/AuthenticationServerFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/AuthenticationServerFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/CertificateFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/CertificateFieldTest.php
index 8e75cb9f2..0f1c6bbc7 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/CertificateFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/CertificateFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\CertificateField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class CertificateFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class CertificateFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\CertificateField', new CertificateField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/CertificateFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/CertificateFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/InterfaceFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/InterfaceFieldTest.php
index 986eab321..5cd14cec0 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/InterfaceFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/InterfaceFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\InterfaceField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class InterfaceFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class InterfaceFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\InterfaceField', new InterfaceField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/InterfaceFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/InterfaceFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/ModelRelationFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/ModelRelationFieldTest.php
index 4db7b8d82..814dde21e 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/ModelRelationFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/ModelRelationFieldTest.php
@@ -34,14 +34,14 @@ require_once __DIR__ . '/../BaseModel/TestModel.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\ModelRelationField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class ModelRelationFieldTest extends Field_Framework_TestCase
 {
     protected function setUp(): void
     {
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/ModelRelationFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/ModelRelationFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/NetworkAliasFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/NetworkAliasFieldTest.php
index bbdd449a2..2a6e9cc21 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/NetworkAliasFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/NetworkAliasFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\NetworkAliasField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class NetworkAliasFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class NetworkAliasFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\NetworkAliasField', new NetworkAliasField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/NetworkAliasFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/NetworkAliasFieldTest/');
         Config::getInstance()->forceReload();
     }
 
diff --git a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/VirtualIPFieldTest.php b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/VirtualIPFieldTest.php
index 918c3bfe5..503da29c5 100644
--- a/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/VirtualIPFieldTest.php
+++ b/src/opnsense/mvc/tests/app/models/OPNsense/Base/FieldTypes/VirtualIPFieldTest.php
@@ -35,7 +35,7 @@ require_once 'Field_Framework_TestCase.php';
 // @CodingStandardsIgnoreEnd
 
 use OPNsense\Base\FieldTypes\VirtualIPField;
-use Phalcon\Di\FactoryDefault;
+use OPNsense\Core\AppConfig;
 use OPNsense\Core\Config;
 
 class VirtualIPFieldTest extends Field_Framework_TestCase
@@ -47,7 +47,7 @@ class VirtualIPFieldTest extends Field_Framework_TestCase
     {
         $this->assertInstanceOf('\OPNsense\Base\FieldTypes\VirtualIPField', new VirtualIPField());
         // switch config to test set for this type
-        FactoryDefault::getDefault()->get('config')->globals->config_path = __DIR__ . '/VirtualIPFieldTest/';
+        (new AppConfig())->update('globals.config_path',  __DIR__ . '/VirtualIPFieldTest/');
         Config::getInstance()->forceReload();
     }