diff --git a/src/Api/Upload/UploadTrait.php b/src/Api/Upload/UploadTrait.php
index e4cc5022..fa421ca9 100644
--- a/src/Api/Upload/UploadTrait.php
+++ b/src/Api/Upload/UploadTrait.php
@@ -56,6 +56,7 @@ public static function buildUploadParams($options)
             'eager_async',
             'eager_notification_url',
             'eval',
+            'on_success',
             'exif',
             'faces',
             'filename_override',
diff --git a/tests/Integration/IntegrationTestCase.php b/tests/Integration/IntegrationTestCase.php
index f3144d97..33390236 100644
--- a/tests/Integration/IntegrationTestCase.php
+++ b/tests/Integration/IntegrationTestCase.php
@@ -44,10 +44,11 @@ abstract class IntegrationTestCase extends CloudinaryTestCase
     const TEST_DOCX_PATH      = self::TEST_ASSETS_DIR . AssetTestCase::DOCX_NAME;
     const TEST_VIDEO_PATH     = self::TEST_ASSETS_DIR . AssetTestCase::VIDEO_NAME;
     const TEST_LOGGING        = ['logging' => ['test' => ['level' => 'debug']]];
-    const TEST_EVAL_STR
-                              = 'if (resource_info["width"] < 450) { upload_options["quality_analysis"] = true }; ' .
+    const TEST_EVAL_STR       = 'if (resource_info["width"] < 450) { upload_options["quality_analysis"] = true }; ' .
                                 'upload_options["context"] = "width=" + resource_info["width"]';
 
+    const TEST_ON_SUCCESS_STR = 'current_asset.update({tags: ["autocaption"]});';
+
     private static $TEST_ASSETS = [];
 
     protected static $UNIQUE_UPLOAD_PRESET;
diff --git a/tests/Unit/Upload/UploadApiTest.php b/tests/Unit/Upload/UploadApiTest.php
index 34ce8dc2..6063095f 100644
--- a/tests/Unit/Upload/UploadApiTest.php
+++ b/tests/Unit/Upload/UploadApiTest.php
@@ -15,6 +15,7 @@
 use Cloudinary\Configuration\Configuration;
 use Cloudinary\Test\Helpers\MockUploadApi;
 use Cloudinary\Test\Helpers\RequestAssertionsTrait;
+use Cloudinary\Test\Integration\IntegrationTestCase;
 use Cloudinary\Test\Unit\Asset\AssetTestCase;
 
 /**
@@ -38,6 +39,7 @@ public function testVariousUploadParams()
             'cinemagraph_analysis'   => true,
             'media_metadata'         => true,
             'visual_search'          => true,
+            'on_success'             => IntegrationTestCase::TEST_ON_SUCCESS_STR,
         ];
 
         $mockUploadApi = new MockUploadApi();
@@ -49,7 +51,7 @@ public function testVariousUploadParams()
         $lastOptions = $mockUploadApi->getApiClient()->getRequestMultipartOptions();
 
         foreach ($params as $param => $value) {
-            self::assertEquals($value ? '1' : '0', $lastOptions[$param]);
+            self::assertEquals(is_bool($value) ? $value ? '1' : '0': $value, $lastOptions[$param]);
         }
     }