diff --git a/core/modules/media_library/src/Form/FileUploadForm.php b/core/modules/media_library/src/Form/FileUploadForm.php
index df3e84286d..dfd2f01ed8 100644
--- a/core/modules/media_library/src/Form/FileUploadForm.php
+++ b/core/modules/media_library/src/Form/FileUploadForm.php
@@ -142,7 +142,7 @@ protected function buildInputElement(array $form, FormStateInterface $form_state
 
     $file_upload_help = [
       '#theme' => 'file_upload_help',
-      '#upload_validators' => $form['upload']['#upload_validators'],
+      '#upload_validators' => $form['container']['upload']['#upload_validators'],
       '#cardinality' => $slots,
     ];
 
diff --git a/core/modules/media_library/tests/src/Kernel/MediaLibraryAddFormTest.php b/core/modules/media_library/tests/src/Kernel/MediaLibraryAddFormTest.php
index 0d180bb880..833ede9a65 100644
--- a/core/modules/media_library/tests/src/Kernel/MediaLibraryAddFormTest.php
+++ b/core/modules/media_library/tests/src/Kernel/MediaLibraryAddFormTest.php
@@ -87,7 +87,7 @@ public function testMediaTypeAddForm() {
     ]));
     // Assert the media library UI only contains the add form for the image
     // media type.
-    $this->assertSame('managed_file', $this->buildLibraryUi('image')['content']['form']['upload']['#type']);
+    $this->assertSame('managed_file', $this->buildLibraryUi('image')['content']['form']['container']['upload']['#type']);
     $this->assertEmpty($this->buildLibraryUi('remote_video')['content']['form']);
 
     // Create a user that has access to create both media types.
@@ -97,7 +97,7 @@ public function testMediaTypeAddForm() {
     ]));
     // Assert the media library UI only contains the add form for both media
     // types.
-    $this->assertSame('managed_file', $this->buildLibraryUi('image')['content']['form']['upload']['#type']);
+    $this->assertSame('managed_file', $this->buildLibraryUi('image')['content']['form']['container']['upload']['#type']);
     $this->assertSame('url', $this->buildLibraryUi('remote_video')['content']['form']['container']['url']['#type']);
   }