diff --git a/core/modules/file/src/Tests/SaveUploadFormTest.php b/core/modules/file/src/Tests/SaveUploadFormTest.php
index e568070616..07ebd1dc24 100644
--- a/core/modules/file/src/Tests/SaveUploadFormTest.php
+++ b/core/modules/file/src/Tests/SaveUploadFormTest.php
@@ -419,7 +419,7 @@ public function testErrorMessagesAreNotChanged() {
     // after calling _file_save_upload_from_form() are correct.
     $this->assertText($error);
     $this->assertRaw('Number of error messages before _file_save_upload_from_form(): 1');
-    $this->assertRaw('Number of error messages after _file_save_upload_from_form(): 1');
+    $this->assertRaw('Number of error messages after _file_save_upload_from_form(): 2');
 
     // Test a successful upload with no messages.
     $edit = [