diff --git a/lib/galaxy_test/api/test_tools_upload.py b/lib/galaxy_test/api/test_tools_upload.py
index 51df9ab4adc..ef35eecf6de 100644
--- a/lib/galaxy_test/api/test_tools_upload.py
+++ b/lib/galaxy_test/api/test_tools_upload.py
@@ -990,6 +990,7 @@ class TestToolsUpload(ApiTestCase):
             # Upload a file to a tus server.
             uploader = my_client.uploader(path, metadata=metadata)
             uploader.upload()
+            assert uploader.url
             return uploader.url.rsplit("/", 1)[1]
 
         with self.dataset_populator.test_history() as history_id: