diff --git a/tests/functional/fileupload_form_test.php b/tests/functional/fileupload_form_test.php
index f7267fa659..99afcfdc3d 100644
--- a/tests/functional/fileupload_form_test.php
+++ b/tests/functional/fileupload_form_test.php
@@ -64,6 +64,9 @@ class phpbb_functional_fileupload_form_test extends phpbb_functional_test_case
 	public function test_valid_file()
 	{
 		$crawler = $this->upload_file('valid.jpg', 'image/jpeg');
+		$this->assert_response_success();
+		// ensure there was no error message rendered
+		$this->assertNotContains('<h2>' . $this->lang('INFORMATION') . '</h2>', $this->client->getResponse()->getContent());
 		$this->assertContains($this->lang('POSTED_ATTACHMENTS'), $crawler->filter('#postform h3')->eq(1)->text());
 	}
 }