diff --git a/_build/test/Tests/Model/Transport/modPackageBuilderTest.php b/_build/test/Tests/Model/Transport/modPackageBuilderTest.php
index 5837d1663f3..c9b75d532d7 100644
--- a/_build/test/Tests/Model/Transport/modPackageBuilderTest.php
+++ b/_build/test/Tests/Model/Transport/modPackageBuilderTest.php
@@ -12,7 +12,9 @@
 namespace MODX\Revolution\Tests\Model\Transport;
 
 
+use MODX\Revolution\modX;
 use MODX\Revolution\MODxTestCase;
+use MODX\Revolution\Transport\modPackageBuilder;
 
 /**
  * Tests related to the modPackageBuilder class.
@@ -24,7 +26,27 @@
  * @group modPackageBuilder
  */
 class modPackageBuilderTest extends MODxTestCase {
-    public function testExample() {
-        $this->assertTrue(true);
+    /**
+     * modPackageBuilder must declare $modx to avoid PHP 8.2 dynamic property deprecations.
+     */
+    public function testConstructorDoesNotCreateDynamicModxProperty()
+    {
+        $deprecations = [];
+        set_error_handler(static function ($severity, $message) use (&$deprecations) {
+            if ($severity === E_DEPRECATED && str_contains($message, 'dynamic property')) {
+                $deprecations[] = $message;
+            }
+            return true;
+        }, E_DEPRECATED);
+
+        try {
+            $builder = new modPackageBuilder($this->modx);
+        } finally {
+            restore_error_handler();
+        }
+
+        $this->assertSame([], $deprecations, 'Expected no dynamic property deprecations on construction');
+        $this->assertInstanceOf(modX::class, $builder->modx);
+        $this->assertSame($this->modx, $builder->modx);
     }
 }
diff --git a/core/src/Revolution/Transport/modPackageBuilder.php b/core/src/Revolution/Transport/modPackageBuilder.php
index a57ae36ef61..5160dbbac18 100644
--- a/core/src/Revolution/Transport/modPackageBuilder.php
+++ b/core/src/Revolution/Transport/modPackageBuilder.php
@@ -24,6 +24,12 @@
 class modPackageBuilder
 {
 
+    /**
+     * @var modX A reference to the MODX instance.
+     * @access public
+     */
+    public $modx = null;
+
     /**
      * @var string The directory in which the package file is located.
      * @access public